Sulfur supplies of arc volcanoes from frontal to back-arc-sulfur contents of melt inclusions in phenocrysts

弧火山从锋到弧后的硫供应量——斑晶中熔体包裹体的硫含量

• 批准号: 15540433
• 负责人: YAMAGUCHI Yoshiaki
• 金额: $ 2.37万
• 依托单位: Shinshu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15540433/
• 关键词: melt inclusion; Sulfer content; arc volcanics; volcanic front; back-arc; mafic magma; subduction zone; 火山フロント; 沈み込み帯; イオウ供給; 斑晶メルト包有物; マフィックマグマ; 浅間火山; 富士火山; 背弧火山

Our research project revealed that subduction related magmas of island arc volcanoes have high sulfur concentrations. Mafic magmas are expected to supply large amounts of sulfur to the volcanic magma system, and the sulfur is released during eruptions. We investigated the characteristics of major components and estimate sulfur supplies in the magma systems of volcanics from the volcanic front to back-arc, based on melt inclusion studies.1)we performed microprobe analyses of sulfur as well as major components of melt inclusions trapped in olivine phenocrysts from many volcanoes along the volcanic front from southwest Hokkaido through Tohoku to Chubu areas. Mafic magmas injected into the felsic chamber beneath the volcanoes is indicated to be hidrous and have large sulfur concentration. The mafic magmas were vesiculated before the melt entrapment in olivine phenocrysts.2)In the back-arc areas, on the other hand, melt inclusions in olivine phenocrysts have relatively low sulfur concentration, and phenocrysts (olivine and pyroxene) trapped high-K_2O melt inclusions.3)We performed microprobe analysis for sulfur, FTIR analysis for H2O, determine Sulfur-Xray peak shift of the melt inclusions trapped in olivine phenocrysts, and tried to develop some methods in the melt inclusion study.

我们的研究项目表明，岛弧火山俯冲相关的岩浆具有高硫浓度。镁铁质岩浆预计将为火山岩浆系统提供大量硫，并且硫在喷发过程中释放出来。基于熔体包裹体研究，研究了从火山前缘到弧后的火山岩浆系统中主要成分的特征，并估算了硫的供应量。1）对硫以及熔体包裹体中捕获的熔体包裹体的主要成分进行了微探针分析。橄榄石斑晶来自北海道西南部、东北地区和中部地区火山前缘的许多火山。注入火山下方长英岩室的镁铁质岩浆显示出多水且硫浓度高。镁铁质岩浆在熔体被橄榄石斑晶包裹之前就已经形成了泡状结构。2)而在弧后区域,橄榄石斑晶中的熔体包裹体硫浓度相对较低,斑晶(橄榄石和辉石)包裹着高K_2O熔体。 3)我们对硫进行了微探针分析，对H2O进行了FTIR分析，确定研究了橄榄石斑晶中捕获的熔体包裹体的硫X射线峰移，并尝试开发一些熔体包裹体研究的方法。

项目成果

Synthetic silica glass for trace aluminum analysis in quartz by electron microprobe.

用于通过电子微探针分析石英中痕量铝的合成石英玻璃。

• 发表时间: 2003
• 期刊: The Journal of Geostandards and Geoanalysis 27
• 作者: Miyoshi;N.;Satoh;H.;Yamaguchi;Y.;Masuda;H.
• 通讯作者: H.

Sulfur source for the 1991-1995 Unzen eruption : Evidence from melt inclusions in pyroxenes.

1991-1995 年云仙喷发的硫源：辉石中熔体包裹体的证据。

• 发表时间: 2003
• 期刊: Geophysical Research Letters 30, 20
• 作者: Satoh;H.;Saito;G.;Shinohara;H.;Yamaguchi;Y.
• 通讯作者: Y.

Mafic enclaves densely concentrated in the upper part of the vertically zoned felsic magma chamber : The Kurobegawa Granitic Pluton, Hida Mountain Range, central Japan

镁铁质包体密集地集中在垂直分区的长英质岩浆房的上部：日本中部飞驒山脉的黑部川花岗岩岩体

• 发表时间: 2004
• 期刊: The Geological Society of America Bulletin 116
• 作者: Wada;H.;Harayama;S.;Yamaguchi;Y.
• 通讯作者: Y.

Mafic enclaves densely concentrated in the upper part of the vertically zoned felsic magma chamber : The Kurobegawa Granitic Pluton, Hida Mountain Range, central Japan.

镁铁质包体密集地集中在垂直分区的长英质岩浆房的上部：日本中部飞驒山脉的黑部川花岗岩岩体。

• 发表时间: 2004
• 期刊: The Geological Society of America Bulletin 116
• 作者: Wada;H.;Harayama;S.;Yamaguchi;Y.
• 通讯作者: Y.

Synthetic silica glass for trace aluminum analysis in quartz by electron microprobe

用于电子微探针分析石英中痕量铝的合成石英玻璃

• 发表时间: 2003
• 期刊: The Journal of Geostandards and Geoanalysis 27
• 作者: Miyoshi;N.;Satoh;H.;Yamaguchi;Y.;Masuda;H.
• 通讯作者: H.