Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies
Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation da...
Ausführliche Beschreibung
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| Autor*in: |
Kazahaya, Ryunosuke [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Rechteinformationen: |
Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Journal of geophysical research / B - Washington, DC : Union, 1978, 120(2015), 5, Seite 2961-2973 |
|---|---|
| Übergeordnetes Werk: |
volume:120 ; year:2015 ; number:5 ; pages:2961-2973 |
| Links: |
|---|
| DOI / URN: |
10.1002/2014JB011715 |
|---|
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OLC1968739238 |
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| 245 | 1 | 0 | |a Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies |
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| 520 | |a Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation | ||
| 540 | |a Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. | ||
| 650 | 4 | |a volumetric balance | |
| 650 | 4 | |a volcanic gases | |
| 650 | 4 | |a magma transportation | |
| 650 | 4 | |a ground deformation | |
| 650 | 4 | |a magma convection in conduit | |
| 650 | 4 | |a Volcanoes | |
| 650 | 4 | |a Sulfuric acid | |
| 650 | 4 | |a Methane | |
| 650 | 4 | |a Lava | |
| 650 | 4 | |a Magma | |
| 700 | 1 | |a Aoki, Yosuke |4 oth | |
| 700 | 1 | |a Shinohara, Hiroshi |4 oth | |
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| 856 | 4 | 2 | |u http://onlinelibrary.wiley.com/doi/10.1002/2014JB011715/abstract |
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10.1002/2014JB011715 doi PQ20160617 (DE-627)OLC1968739238 (DE-599)GBVOLC1968739238 (PRQ)p2081-84ea193472e355a6d73e2e7a2dc5817767f0ba2ece7bd292dcad0f7689cb75ef0 (KEY)0108436420150000120000502961budgetofshallowmagmaplumbingsystematasamavolcanoja DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Kazahaya, Ryunosuke verfasserin aut Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. volumetric balance volcanic gases magma transportation ground deformation magma convection in conduit Volcanoes Sulfuric acid Methane Lava Magma Aoki, Yosuke oth Shinohara, Hiroshi oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 120(2015), 5, Seite 2961-2973 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:120 year:2015 number:5 pages:2961-2973 http://dx.doi.org/10.1002/2014JB011715 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JB011715/abstract http://search.proquest.com/docview/1689552248 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 120 2015 5 2961-2973 |
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10.1002/2014JB011715 doi PQ20160617 (DE-627)OLC1968739238 (DE-599)GBVOLC1968739238 (PRQ)p2081-84ea193472e355a6d73e2e7a2dc5817767f0ba2ece7bd292dcad0f7689cb75ef0 (KEY)0108436420150000120000502961budgetofshallowmagmaplumbingsystematasamavolcanoja DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Kazahaya, Ryunosuke verfasserin aut Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. volumetric balance volcanic gases magma transportation ground deformation magma convection in conduit Volcanoes Sulfuric acid Methane Lava Magma Aoki, Yosuke oth Shinohara, Hiroshi oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 120(2015), 5, Seite 2961-2973 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:120 year:2015 number:5 pages:2961-2973 http://dx.doi.org/10.1002/2014JB011715 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JB011715/abstract http://search.proquest.com/docview/1689552248 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 120 2015 5 2961-2973 |
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10.1002/2014JB011715 doi PQ20160617 (DE-627)OLC1968739238 (DE-599)GBVOLC1968739238 (PRQ)p2081-84ea193472e355a6d73e2e7a2dc5817767f0ba2ece7bd292dcad0f7689cb75ef0 (KEY)0108436420150000120000502961budgetofshallowmagmaplumbingsystematasamavolcanoja DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Kazahaya, Ryunosuke verfasserin aut Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. volumetric balance volcanic gases magma transportation ground deformation magma convection in conduit Volcanoes Sulfuric acid Methane Lava Magma Aoki, Yosuke oth Shinohara, Hiroshi oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 120(2015), 5, Seite 2961-2973 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:120 year:2015 number:5 pages:2961-2973 http://dx.doi.org/10.1002/2014JB011715 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JB011715/abstract http://search.proquest.com/docview/1689552248 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 120 2015 5 2961-2973 |
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10.1002/2014JB011715 doi PQ20160617 (DE-627)OLC1968739238 (DE-599)GBVOLC1968739238 (PRQ)p2081-84ea193472e355a6d73e2e7a2dc5817767f0ba2ece7bd292dcad0f7689cb75ef0 (KEY)0108436420150000120000502961budgetofshallowmagmaplumbingsystematasamavolcanoja DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Kazahaya, Ryunosuke verfasserin aut Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. volumetric balance volcanic gases magma transportation ground deformation magma convection in conduit Volcanoes Sulfuric acid Methane Lava Magma Aoki, Yosuke oth Shinohara, Hiroshi oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 120(2015), 5, Seite 2961-2973 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:120 year:2015 number:5 pages:2961-2973 http://dx.doi.org/10.1002/2014JB011715 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JB011715/abstract http://search.proquest.com/docview/1689552248 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 120 2015 5 2961-2973 |
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10.1002/2014JB011715 doi PQ20160617 (DE-627)OLC1968739238 (DE-599)GBVOLC1968739238 (PRQ)p2081-84ea193472e355a6d73e2e7a2dc5817767f0ba2ece7bd292dcad0f7689cb75ef0 (KEY)0108436420150000120000502961budgetofshallowmagmaplumbingsystematasamavolcanoja DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Kazahaya, Ryunosuke verfasserin aut Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved. volumetric balance volcanic gases magma transportation ground deformation magma convection in conduit Volcanoes Sulfuric acid Methane Lava Magma Aoki, Yosuke oth Shinohara, Hiroshi oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 120(2015), 5, Seite 2961-2973 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:120 year:2015 number:5 pages:2961-2973 http://dx.doi.org/10.1002/2014JB011715 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2014JB011715/abstract http://search.proquest.com/docview/1689552248 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 120 2015 5 2961-2973 |
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Kazahaya, Ryunosuke |
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Kazahaya, Ryunosuke ddc 550 bkl 38.70 misc volumetric balance misc volcanic gases misc magma transportation misc ground deformation misc magma convection in conduit misc Volcanoes misc Sulfuric acid misc Methane misc Lava misc Magma Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies |
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550 DNB 38.70 bkl Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies volumetric balance volcanic gases magma transportation ground deformation magma convection in conduit Volcanoes Sulfuric acid Methane Lava Magma |
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ddc 550 bkl 38.70 misc volumetric balance misc volcanic gases misc magma transportation misc ground deformation misc magma convection in conduit misc Volcanoes misc Sulfuric acid misc Methane misc Lava misc Magma |
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ddc 550 bkl 38.70 misc volumetric balance misc volcanic gases misc magma transportation misc ground deformation misc magma convection in conduit misc Volcanoes misc Sulfuric acid misc Methane misc Lava misc Magma |
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budget of shallow magma plumbing system at asama volcano, japan, revealed by ground deformation and volcanic gas studies |
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Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies |
| abstract |
Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation |
| abstractGer |
Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation |
| abstract_unstemmed |
Multiple cycles of the intensive volcanic gas discharge and ground deformation (inflation and deflation) were observed at Asama Volcano, Japan, from 2000 to 2011. Magma budget of the shallow magma plumbing system was estimated on the basis of the volcanic gas emission rates and ground deformation data. Recent inflations observed in 2004 and 2008 were modeled as a dike intrusion to 2–3 km west of Asama Volcano. Previous studies proposed that magma ascends from a midcrustal magma reservoir to the dike and reaches the surface via a sinuous conduit which connects the dike to the summit. The intensive volcanic sulfur dioxide discharge of up to 4600 t/d at the volcano was modeled by magma convective degassing through this magma pathway. The volcano deflates as shrinkage of the magma in a reservoir by volcanic gas discharge. We estimated the volume change of the dike modeled based on the GPS observations, the volume decrease of the magma by the volcanic gas discharge, and the amount of degassed magma produced to calculate the magma budget. The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation |
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Budget of shallow magma plumbing system at Asama Volcano, Japan, revealed by ground deformation and volcanic gas studies |
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The results show that the volume decrease of the magma by the volcanic gas discharge was larger than the volume change of the dike during the inflation periods. This indicates that a significant volume of magma at least more than 2 times larger than the volume change of the dike was supplied from the midcrustal magma reservoir to the dike. The volume decrease of the dike was comparable with the volume decrease of the magma by the volcanic gas discharge during the deflation periods. The long‐term deflation trend of the dike and the volume of degassed magma (10 8–9 m 3 ) suggest that the degassed magma produced is not stored in the dike and the magma is mainly supplied from the midcrustal magma reservoir. In both periods, the volume of degassed magma produced was 1 order of magnitude larger than the volume change of the dike. This indicates that the actual volume of the magma supplied from the midcrustal magma reservoir is up to 1 order of magnitude larger than the volume change of the dike. These results strongly suggest that an amount of magma moved through a magma reservoir is possible to be significantly larger than volume change of the magma reservoir estimated by the geodetic observations. Volume decrease of magma in a reservoir by volcanic gas discharge is estimated The volume decrease is larger than deformation of reservoir inferred by geodesy Volcanic gas discharge is one of the main mechanisms to cause ground deformation</subfield></datafield><datafield tag="540" ind1=" " ind2=" "><subfield code="a">Nutzungsrecht: © 2015. American Geophysical Union. All Rights Reserved.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">volumetric balance</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">volcanic gases</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">magma transportation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">ground deformation</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">magma convection in conduit</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Volcanoes</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Sulfuric acid</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Methane</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Lava</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Magma</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Aoki, Yosuke</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Shinohara, Hiroshi</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Journal of geophysical research / B</subfield><subfield code="d">Washington, DC : Union, 1978</subfield><subfield code="g">120(2015), 5, Seite 2961-2973</subfield><subfield code="w">(DE-627)129366382</subfield><subfield code="w">(DE-600)161666-3</subfield><subfield code="w">(DE-576)014740451</subfield><subfield code="x">0148-0227</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:120</subfield><subfield code="g">year:2015</subfield><subfield code="g">number:5</subfield><subfield code="g">pages:2961-2973</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">http://dx.doi.org/10.1002/2014JB011715</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">http://onlinelibrary.wiley.com/doi/10.1002/2014JB011715/abstract</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">http://search.proquest.com/docview/1689552248</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-PHY</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">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_62</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_2279</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">38.70</subfield><subfield code="q">AVZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">120</subfield><subfield code="j">2015</subfield><subfield code="e">5</subfield><subfield code="h">2961-2973</subfield></datafield></record></collection>
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