Petrography of the Manu'a Islands, Samoa

Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samp...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Stice, Gary D. [verfasserIn]

Format:	Artikel
Sprache:	Englisch

Erschienen:	1968

Schlagwörter:	Olivine Picrite Olivine Basalt Olivine Gabbro Lapillus Tuff

Systematik:	TE 1000

Anmerkung:	© Springer-Verlag 1968

Übergeordnetes Werk:	Enthalten in: Contributions to mineralogy and petrology - Springer-Verlag, 1966, 19(1968), 4 vom: Nov., Seite 343-357
Übergeordnetes Werk:	volume:19 ; year:1968 ; number:4 ; month:11 ; pages:343-357

Links:	Volltext

DOI / URN:	10.1007/BF00389417

Katalog-ID:	OLC207047979X

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520			\|a Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase.
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allfields	10.1007/BF00389417 doi (DE-627)OLC207047979X (DE-He213)BF00389417-p DE-627 ger DE-627 rakwb eng 550 VZ 13 ssgn TE 1000 VZ rvk Stice, Gary D. verfasserin aut Petrography of the Manu'a Islands, Samoa 1968 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1968 Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase. Olivine Picrite Olivine Basalt Olivine Gabbro Lapillus Tuff Enthalten in Contributions to mineralogy and petrology Springer-Verlag, 1966 19(1968), 4 vom: Nov., Seite 343-357 (DE-627)129068721 (DE-600)1616-0 (DE-576)014400367 0010-7999 nnns volume:19 year:1968 number:4 month:11 pages:343-357 https://doi.org/10.1007/BF00389417 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4028 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4319 GBV_ILN_4320 GBV_ILN_4323 TE 1000 AR 19 1968 4 11 343-357
spelling	10.1007/BF00389417 doi (DE-627)OLC207047979X (DE-He213)BF00389417-p DE-627 ger DE-627 rakwb eng 550 VZ 13 ssgn TE 1000 VZ rvk Stice, Gary D. verfasserin aut Petrography of the Manu'a Islands, Samoa 1968 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1968 Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase. Olivine Picrite Olivine Basalt Olivine Gabbro Lapillus Tuff Enthalten in Contributions to mineralogy and petrology Springer-Verlag, 1966 19(1968), 4 vom: Nov., Seite 343-357 (DE-627)129068721 (DE-600)1616-0 (DE-576)014400367 0010-7999 nnns volume:19 year:1968 number:4 month:11 pages:343-357 https://doi.org/10.1007/BF00389417 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4028 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4319 GBV_ILN_4320 GBV_ILN_4323 TE 1000 AR 19 1968 4 11 343-357
allfields_unstemmed	10.1007/BF00389417 doi (DE-627)OLC207047979X (DE-He213)BF00389417-p DE-627 ger DE-627 rakwb eng 550 VZ 13 ssgn TE 1000 VZ rvk Stice, Gary D. verfasserin aut Petrography of the Manu'a Islands, Samoa 1968 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1968 Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase. Olivine Picrite Olivine Basalt Olivine Gabbro Lapillus Tuff Enthalten in Contributions to mineralogy and petrology Springer-Verlag, 1966 19(1968), 4 vom: Nov., Seite 343-357 (DE-627)129068721 (DE-600)1616-0 (DE-576)014400367 0010-7999 nnns volume:19 year:1968 number:4 month:11 pages:343-357 https://doi.org/10.1007/BF00389417 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4028 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4319 GBV_ILN_4320 GBV_ILN_4323 TE 1000 AR 19 1968 4 11 343-357
allfieldsGer	10.1007/BF00389417 doi (DE-627)OLC207047979X (DE-He213)BF00389417-p DE-627 ger DE-627 rakwb eng 550 VZ 13 ssgn TE 1000 VZ rvk Stice, Gary D. verfasserin aut Petrography of the Manu'a Islands, Samoa 1968 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1968 Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase. Olivine Picrite Olivine Basalt Olivine Gabbro Lapillus Tuff Enthalten in Contributions to mineralogy and petrology Springer-Verlag, 1966 19(1968), 4 vom: Nov., Seite 343-357 (DE-627)129068721 (DE-600)1616-0 (DE-576)014400367 0010-7999 nnns volume:19 year:1968 number:4 month:11 pages:343-357 https://doi.org/10.1007/BF00389417 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4028 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4319 GBV_ILN_4320 GBV_ILN_4323 TE 1000 AR 19 1968 4 11 343-357
allfieldsSound	10.1007/BF00389417 doi (DE-627)OLC207047979X (DE-He213)BF00389417-p DE-627 ger DE-627 rakwb eng 550 VZ 13 ssgn TE 1000 VZ rvk Stice, Gary D. verfasserin aut Petrography of the Manu'a Islands, Samoa 1968 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1968 Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase. Olivine Picrite Olivine Basalt Olivine Gabbro Lapillus Tuff Enthalten in Contributions to mineralogy and petrology Springer-Verlag, 1966 19(1968), 4 vom: Nov., Seite 343-357 (DE-627)129068721 (DE-600)1616-0 (DE-576)014400367 0010-7999 nnns volume:19 year:1968 number:4 month:11 pages:343-357 https://doi.org/10.1007/BF00389417 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_40 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4028 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4319 GBV_ILN_4320 GBV_ILN_4323 TE 1000 AR 19 1968 4 11 343-357
language	English
source	Enthalten in Contributions to mineralogy and petrology 19(1968), 4 vom: Nov., Seite 343-357 volume:19 year:1968 number:4 month:11 pages:343-357
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topic_facet	Olivine Picrite Olivine Basalt Olivine Gabbro Lapillus Tuff
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author	Stice, Gary D.
spellingShingle	Stice, Gary D. ddc 550 ssgn 13 rvk TE 1000 misc Olivine misc Picrite misc Olivine Basalt misc Olivine Gabbro misc Lapillus Tuff Petrography of the Manu'a Islands, Samoa
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topic_title	550 VZ 13 ssgn TE 1000 VZ rvk Petrography of the Manu'a Islands, Samoa Olivine Picrite Olivine Basalt Olivine Gabbro Lapillus Tuff
topic	ddc 550 ssgn 13 rvk TE 1000 misc Olivine misc Picrite misc Olivine Basalt misc Olivine Gabbro misc Lapillus Tuff
topic_unstemmed	ddc 550 ssgn 13 rvk TE 1000 misc Olivine misc Picrite misc Olivine Basalt misc Olivine Gabbro misc Lapillus Tuff
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title	Petrography of the Manu'a Islands, Samoa
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title_full	Petrography of the Manu'a Islands, Samoa
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title_sort	petrography of the manu'a islands, samoa
title_auth	Petrography of the Manu'a Islands, Samoa
abstract	Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase. © Springer-Verlag 1968
abstractGer	Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase. © Springer-Verlag 1968
abstract_unstemmed	Abstract The rocks of the Manu'a Islands are predominantly olivine basalt with lesser amounts of picrite basalt (both ankaramite and oceanite), basalt, hawaiite, olivine gabbro, basaltic lapilli tuff, and ash. Alkali ∶ silica ratios obtained from chemical analyses of twenty widely selected samples place the rocks in the alkali basalt suite. All of the samples are also high in titanium. Plots of the chemical analyses, including samples from nearby Tutuila Island, show a progressive enrichment in alkalis. The occurrence of hawaiite and picrite basalt indicates that a primitive alkalic olivine basalt magma was undergoing differentiation. The most important factor in this process was crystal settling, especially of olivine. The dunite xenoliths in the late-stage rocks of Ta'u Island probably came from a residual olivine layer near the bottom of the magma chamber. The magma did not become sufficiently silicic to produce the trachytic end-member of the series, which probably would have contained normative and possibly some modal quartz, as on Tutuila Island. With increasing silica content, iron and titanium generally decrease slightly, whereas alkalis increase. © Springer-Verlag 1968
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title_short	Petrography of the Manu'a Islands, Samoa
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