Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies
Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experim...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Mishra, B. [verfasserIn] |
|---|
| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
1999 |
|---|
| Schlagwörter: |
|---|
| Systematik: |
|
|---|
| Anmerkung: |
© Springer-Verlag Berlin Heidelberg 1999 |
|---|
| Übergeordnetes Werk: |
Enthalten in: Mineralium deposita - Springer-Verlag, 1966, 34(1999), 2 vom: Jan., Seite 173-181 |
|---|---|
| Übergeordnetes Werk: |
volume:34 ; year:1999 ; number:2 ; month:01 ; pages:173-181 |
| Links: |
|---|
| DOI / URN: |
10.1007/s001260050194 |
|---|
| Katalog-ID: |
OLC2058249305 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | OLC2058249305 | ||
| 003 | DE-627 | ||
| 005 | 20230401050212.0 | ||
| 007 | tu | ||
| 008 | 200820s1999 xx ||||| 00| ||eng c | ||
| 024 | 7 | |a 10.1007/s001260050194 |2 doi | |
| 035 | |a (DE-627)OLC2058249305 | ||
| 035 | |a (DE-He213)s001260050194-p | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 082 | 0 | 4 | |a 550 |q VZ |
| 082 | 0 | 4 | |a 550 |q VZ |
| 084 | |a 13 |2 ssgn | ||
| 084 | |a TE 1000 |q VZ |2 rvk | ||
| 100 | 1 | |a Mishra, B. |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies |
| 264 | 1 | |c 1999 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 500 | |a © Springer-Verlag Berlin Heidelberg 1999 | ||
| 520 | |a Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. | ||
| 650 | 4 | |a Fluid Inclusion | |
| 650 | 4 | |a Halite | |
| 650 | 4 | |a Dharwar Craton | |
| 650 | 4 | |a Fluid Inclusion Study | |
| 650 | 4 | |a Schist Belt | |
| 700 | 1 | |a Panigrahi, M. K. |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Mineralium deposita |d Springer-Verlag, 1966 |g 34(1999), 2 vom: Jan., Seite 173-181 |w (DE-627)12906906X |w (DE-600)1679-2 |w (DE-576)01440074X |x 0026-4598 |7 nnns |
| 773 | 1 | 8 | |g volume:34 |g year:1999 |g number:2 |g month:01 |g pages:173-181 |
| 856 | 4 | 1 | |u https://doi.org/10.1007/s001260050194 |z lizenzpflichtig |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a SYSFLAG_A | ||
| 912 | |a GBV_OLC | ||
| 912 | |a SSG-OLC-GEO | ||
| 912 | |a SSG-OPC-GGO | ||
| 912 | |a GBV_ILN_11 | ||
| 912 | |a GBV_ILN_22 | ||
| 912 | |a GBV_ILN_30 | ||
| 912 | |a GBV_ILN_31 | ||
| 912 | |a GBV_ILN_40 | ||
| 912 | |a GBV_ILN_65 | ||
| 912 | |a GBV_ILN_70 | ||
| 912 | |a GBV_ILN_285 | ||
| 912 | |a GBV_ILN_2010 | ||
| 912 | |a GBV_ILN_2015 | ||
| 912 | |a GBV_ILN_2018 | ||
| 912 | |a GBV_ILN_2027 | ||
| 912 | |a GBV_ILN_4112 | ||
| 912 | |a GBV_ILN_4125 | ||
| 912 | |a GBV_ILN_4277 | ||
| 912 | |a GBV_ILN_4305 | ||
| 912 | |a GBV_ILN_4306 | ||
| 912 | |a GBV_ILN_4307 | ||
| 912 | |a GBV_ILN_4319 | ||
| 936 | r | v | |a TE 1000 |
| 951 | |a AR | ||
| 952 | |d 34 |j 1999 |e 2 |c 01 |h 173-181 | ||
| author_variant |
b m bm m k p mk mkp |
|---|---|
| matchkey_str |
article:00264598:1999----::lieouinnhklrodileiecfofu |
| hierarchy_sort_str |
1999 |
| publishDate |
1999 |
| allfields |
10.1007/s001260050194 doi (DE-627)OLC2058249305 (DE-He213)s001260050194-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn TE 1000 VZ rvk Mishra, B. verfasserin aut Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies 1999 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 1999 Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. Fluid Inclusion Halite Dharwar Craton Fluid Inclusion Study Schist Belt Panigrahi, M. K. aut Enthalten in Mineralium deposita Springer-Verlag, 1966 34(1999), 2 vom: Jan., Seite 173-181 (DE-627)12906906X (DE-600)1679-2 (DE-576)01440074X 0026-4598 nnns volume:34 year:1999 number:2 month:01 pages:173-181 https://doi.org/10.1007/s001260050194 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 TE 1000 AR 34 1999 2 01 173-181 |
| spelling |
10.1007/s001260050194 doi (DE-627)OLC2058249305 (DE-He213)s001260050194-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn TE 1000 VZ rvk Mishra, B. verfasserin aut Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies 1999 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 1999 Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. Fluid Inclusion Halite Dharwar Craton Fluid Inclusion Study Schist Belt Panigrahi, M. K. aut Enthalten in Mineralium deposita Springer-Verlag, 1966 34(1999), 2 vom: Jan., Seite 173-181 (DE-627)12906906X (DE-600)1679-2 (DE-576)01440074X 0026-4598 nnns volume:34 year:1999 number:2 month:01 pages:173-181 https://doi.org/10.1007/s001260050194 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 TE 1000 AR 34 1999 2 01 173-181 |
| allfields_unstemmed |
10.1007/s001260050194 doi (DE-627)OLC2058249305 (DE-He213)s001260050194-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn TE 1000 VZ rvk Mishra, B. verfasserin aut Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies 1999 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 1999 Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. Fluid Inclusion Halite Dharwar Craton Fluid Inclusion Study Schist Belt Panigrahi, M. K. aut Enthalten in Mineralium deposita Springer-Verlag, 1966 34(1999), 2 vom: Jan., Seite 173-181 (DE-627)12906906X (DE-600)1679-2 (DE-576)01440074X 0026-4598 nnns volume:34 year:1999 number:2 month:01 pages:173-181 https://doi.org/10.1007/s001260050194 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 TE 1000 AR 34 1999 2 01 173-181 |
| allfieldsGer |
10.1007/s001260050194 doi (DE-627)OLC2058249305 (DE-He213)s001260050194-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn TE 1000 VZ rvk Mishra, B. verfasserin aut Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies 1999 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 1999 Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. Fluid Inclusion Halite Dharwar Craton Fluid Inclusion Study Schist Belt Panigrahi, M. K. aut Enthalten in Mineralium deposita Springer-Verlag, 1966 34(1999), 2 vom: Jan., Seite 173-181 (DE-627)12906906X (DE-600)1679-2 (DE-576)01440074X 0026-4598 nnns volume:34 year:1999 number:2 month:01 pages:173-181 https://doi.org/10.1007/s001260050194 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 TE 1000 AR 34 1999 2 01 173-181 |
| allfieldsSound |
10.1007/s001260050194 doi (DE-627)OLC2058249305 (DE-He213)s001260050194-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 13 ssgn TE 1000 VZ rvk Mishra, B. verfasserin aut Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies 1999 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 1999 Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. Fluid Inclusion Halite Dharwar Craton Fluid Inclusion Study Schist Belt Panigrahi, M. K. aut Enthalten in Mineralium deposita Springer-Verlag, 1966 34(1999), 2 vom: Jan., Seite 173-181 (DE-627)12906906X (DE-600)1679-2 (DE-576)01440074X 0026-4598 nnns volume:34 year:1999 number:2 month:01 pages:173-181 https://doi.org/10.1007/s001260050194 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 TE 1000 AR 34 1999 2 01 173-181 |
| language |
English |
| source |
Enthalten in Mineralium deposita 34(1999), 2 vom: Jan., Seite 173-181 volume:34 year:1999 number:2 month:01 pages:173-181 |
| sourceStr |
Enthalten in Mineralium deposita 34(1999), 2 vom: Jan., Seite 173-181 volume:34 year:1999 number:2 month:01 pages:173-181 |
| format_phy_str_mv |
Article |
| institution |
findex.gbv.de |
| topic_facet |
Fluid Inclusion Halite Dharwar Craton Fluid Inclusion Study Schist Belt |
| dewey-raw |
550 |
| isfreeaccess_bool |
false |
| container_title |
Mineralium deposita |
| authorswithroles_txt_mv |
Mishra, B. @@aut@@ Panigrahi, M. K. @@aut@@ |
| publishDateDaySort_date |
1999-01-01T00:00:00Z |
| hierarchy_top_id |
12906906X |
| dewey-sort |
3550 |
| id |
OLC2058249305 |
| language_de |
englisch |
| fullrecord |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">OLC2058249305</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230401050212.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">200820s1999 xx ||||| 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s001260050194</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC2058249305</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-He213)s001260050194-p</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">13</subfield><subfield code="2">ssgn</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">TE 1000</subfield><subfield code="q">VZ</subfield><subfield code="2">rvk</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Mishra, B.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1999</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Springer-Verlag Berlin Heidelberg 1999</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Fluid Inclusion</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Halite</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Dharwar Craton</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Fluid Inclusion Study</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Schist Belt</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Panigrahi, M. K.</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Mineralium deposita</subfield><subfield code="d">Springer-Verlag, 1966</subfield><subfield code="g">34(1999), 2 vom: Jan., Seite 173-181</subfield><subfield code="w">(DE-627)12906906X</subfield><subfield code="w">(DE-600)1679-2</subfield><subfield code="w">(DE-576)01440074X</subfield><subfield code="x">0026-4598</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:34</subfield><subfield code="g">year:1999</subfield><subfield code="g">number:2</subfield><subfield code="g">month:01</subfield><subfield code="g">pages:173-181</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">https://doi.org/10.1007/s001260050194</subfield><subfield code="z">lizenzpflichtig</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_11</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_30</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_31</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_65</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_285</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2010</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2015</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2018</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2027</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4125</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4277</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4305</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4306</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4307</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4319</subfield></datafield><datafield tag="936" ind1="r" ind2="v"><subfield code="a">TE 1000</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">34</subfield><subfield code="j">1999</subfield><subfield code="e">2</subfield><subfield code="c">01</subfield><subfield code="h">173-181</subfield></datafield></record></collection>
|
| author |
Mishra, B. |
| spellingShingle |
Mishra, B. ddc 550 ssgn 13 rvk TE 1000 misc Fluid Inclusion misc Halite misc Dharwar Craton misc Fluid Inclusion Study misc Schist Belt Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies |
| authorStr |
Mishra, B. |
| ppnlink_with_tag_str_mv |
@@773@@(DE-627)12906906X |
| format |
Article |
| dewey-ones |
550 - Earth sciences |
| delete_txt_mv |
keep |
| author_role |
aut aut |
| collection |
OLC |
| remote_str |
false |
| illustrated |
Not Illustrated |
| issn |
0026-4598 |
| topic_title |
550 VZ 13 ssgn TE 1000 VZ rvk Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies Fluid Inclusion Halite Dharwar Craton Fluid Inclusion Study Schist Belt |
| topic |
ddc 550 ssgn 13 rvk TE 1000 misc Fluid Inclusion misc Halite misc Dharwar Craton misc Fluid Inclusion Study misc Schist Belt |
| topic_unstemmed |
ddc 550 ssgn 13 rvk TE 1000 misc Fluid Inclusion misc Halite misc Dharwar Craton misc Fluid Inclusion Study misc Schist Belt |
| topic_browse |
ddc 550 ssgn 13 rvk TE 1000 misc Fluid Inclusion misc Halite misc Dharwar Craton misc Fluid Inclusion Study misc Schist Belt |
| format_facet |
Aufsätze Gedruckte Aufsätze |
| format_main_str_mv |
Text Zeitschrift/Artikel |
| carriertype_str_mv |
nc |
| hierarchy_parent_title |
Mineralium deposita |
| hierarchy_parent_id |
12906906X |
| dewey-tens |
550 - Earth sciences & geology |
| hierarchy_top_title |
Mineralium deposita |
| isfreeaccess_txt |
false |
| familylinks_str_mv |
(DE-627)12906906X (DE-600)1679-2 (DE-576)01440074X |
| title |
Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies |
| ctrlnum |
(DE-627)OLC2058249305 (DE-He213)s001260050194-p |
| title_full |
Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies |
| author_sort |
Mishra, B. |
| journal |
Mineralium deposita |
| journalStr |
Mineralium deposita |
| lang_code |
eng |
| isOA_bool |
false |
| dewey-hundreds |
500 - Science |
| recordtype |
marc |
| publishDateSort |
1999 |
| contenttype_str_mv |
txt |
| container_start_page |
173 |
| author_browse |
Mishra, B. Panigrahi, M. K. |
| container_volume |
34 |
| class |
550 VZ 13 ssgn TE 1000 VZ rvk |
| format_se |
Aufsätze |
| author-letter |
Mishra, B. |
| doi_str_mv |
10.1007/s001260050194 |
| dewey-full |
550 |
| title_sort |
fluid evolution in the kolar gold field: evidence from fluid inclusion studies |
| title_auth |
Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies |
| abstract |
Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. © Springer-Verlag Berlin Heidelberg 1999 |
| abstractGer |
Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. © Springer-Verlag Berlin Heidelberg 1999 |
| abstract_unstemmed |
Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing. © Springer-Verlag Berlin Heidelberg 1999 |
| collection_details |
GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 |
| container_issue |
2 |
| title_short |
Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies |
| url |
https://doi.org/10.1007/s001260050194 |
| remote_bool |
false |
| author2 |
Panigrahi, M. K. |
| author2Str |
Panigrahi, M. K. |
| ppnlink |
12906906X |
| mediatype_str_mv |
n |
| isOA_txt |
false |
| hochschulschrift_bool |
false |
| doi_str |
10.1007/s001260050194 |
| up_date |
2024-07-03T18:14:59.370Z |
| _version_ |
1803582700910542848 |
| fullrecord_marcxml |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">OLC2058249305</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230401050212.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">200820s1999 xx ||||| 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s001260050194</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC2058249305</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-He213)s001260050194-p</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">13</subfield><subfield code="2">ssgn</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">TE 1000</subfield><subfield code="q">VZ</subfield><subfield code="2">rvk</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Mishra, B.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Fluid evolution in the Kolar Gold Field: evidence from fluid inclusion studies</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1999</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Springer-Verlag Berlin Heidelberg 1999</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Gold mineralization in the Kolar schist belt of the Dharwar craton occurs dominantly in the form of a sulfide-poor Au-quartz lode (the Champion lode exposed in the Mysore and other mines) and sulfide-rich auriferous lodes (from the Nundydroog mine). Fluid inclusion microthermometric experiments were conducted on primary inclusions in quartz intimately associated with Au-mineralization. Homogenization studies on aqueous-biphase (L + V), aqueous polyphase (L + V+ halite) and aqueous-carbonic ($ L_{CO2} $± $ V_{CO2} $ + $ L_{aq} $) inclusions from the Champion lode furnish a temperature range of 120 to 420 °C. Freezing of aqueous biphase inclusions and dissolution of halite in the aqueous polyphase inclusions provide salinity of 5 to 50 wt.% NaCl equivalent. Fluid inclusion thermobarometry from the total homogenization of aqueous-carbonic inclusions and from intersecting isochores of coeval pure-carbonic ($ L_{CO2} $± $ V_{CO2} $) and pure-aqueous inclusions constrain the P-T path of evolution of the fluid in the Champion lode. Gold precipitation was likely to have been brought about in response to a sharp fall in pressure with attendant unmixing of liquid-$ CO_{2} $ from the parent $ H_{2} $O-$ CO_{2} $ fluid of possible metamorphic origin. This would imply transportation of gold by some pressure-sensitive complex such as the Au-carbonyl. Fluid characteristics are different in the sulfide-rich auriferous lodes, as indicated by the virtual absence of the $ CO_{2} $-bearing and the halite-bearing inclusions. The fluid evolution path, as evident from the crude positive colinearity of temperature and salinity, is due to mixing of a low (≤200 °C) temperature-low saline (≤7 wt.% NaCl equivalent) fluid with a high temperature (≥400 °C)-high saline (≥50 wt.% NaCl equivalent) fluid. The lack of $ CO_{2} $ and association of Au with sulfides indicate a different mode of gold transport, as chloride or bisulfide complexing, deposition of which was possibly brought about by fluid mixing.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Fluid Inclusion</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Halite</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Dharwar Craton</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Fluid Inclusion Study</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Schist Belt</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Panigrahi, M. K.</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Mineralium deposita</subfield><subfield code="d">Springer-Verlag, 1966</subfield><subfield code="g">34(1999), 2 vom: Jan., Seite 173-181</subfield><subfield code="w">(DE-627)12906906X</subfield><subfield code="w">(DE-600)1679-2</subfield><subfield code="w">(DE-576)01440074X</subfield><subfield code="x">0026-4598</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:34</subfield><subfield code="g">year:1999</subfield><subfield code="g">number:2</subfield><subfield code="g">month:01</subfield><subfield code="g">pages:173-181</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">https://doi.org/10.1007/s001260050194</subfield><subfield code="z">lizenzpflichtig</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_11</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_30</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_31</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_65</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_285</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2010</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2015</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2018</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2027</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4125</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4277</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4305</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4306</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4307</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4319</subfield></datafield><datafield tag="936" ind1="r" ind2="v"><subfield code="a">TE 1000</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">34</subfield><subfield code="j">1999</subfield><subfield code="e">2</subfield><subfield code="c">01</subfield><subfield code="h">173-181</subfield></datafield></record></collection>
|
| score |
7.402501 |