Magmatism in Kyushu : Geochemistry for the mantle wedge and tectonics
九州的岩浆作用:地幔楔和构造的地球化学
基本信息
- 批准号:13640483
- 负责人:
- 金额:$ 2.11万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2001
- 资助国家:日本
- 起止时间:2001 至 2003
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1.In order to explore origin of silicic magmas related to large caldera formation in southern Kyushu, field survey and petrological investigation have been undertaken at the Kikai Caldera volcano, one of the large calderas in south Kyushu. The magmatism is characterized by bimodal (basaltic and rhyolitic) composition. The silicic magmas were originated by partial melting of underplated basaltic magmas.2.For comparison with south Kyushu magmatism, submarine survey in the southern Ryukyu arc-Okinawa Trough system have been done, and petrochemical analyses were also performed. The regional east-west chemical variation with boundary at 123E have been revealed, which is related with the development stage of the Okinawa Trough.3.Across-arc regional variation in chemistry of mantle wedge under the north-central Kyushu was investigated. The source mantle for back-arc side magmas is inferred to be Ocean island basalt (OIB) type, while mantle for volcanic front magmas is depleted MORB-like.4.New analytical technique, using ‘Double spike' method, for Pb isotopic measurement has been developed. Using this method, accurate Pb isotope data have been obtained for many volcanic rocks.5.To evaluate the nature of plate, the Philippine Sea Plate (the West Philippine Basin, WPB), subducting beneath the Kyushu to Ryukyu arc, submarine survey including topography and ROV dives have been undertaken. It is concluded that magmas at the western part of WPB were derived from enriched-OIB like source mantle.
1.为了探讨九州南部大火山口形成过程中硅质岩浆的成因,对九州南部大火山口之一的Kikai火山口进行了野外调查和岩石学调查。岩浆活动具有双峰(玄武岩和流纹岩)的特征。硅质岩浆起源于下镀玄武岩岩浆的部分熔融作用。为了与南九州岩浆活动进行对比,在琉球弧-冲绳海槽体系南部进行了海底测量,并进行了石油化学分析。揭示了以123E为界的区域东西向化学变化,这与冲绳海槽发育阶段有关。研究了九州中北部地幔楔的弧跨区域化学变化。3 .推断弧后侧岩浆源幔为洋岛玄武岩(OIB)型,火山前岩浆源幔为贫化morb型。提出了一种新的测定铅同位素的“双尖峰”分析技术。利用这种方法,已获得了许多火山岩精确的铅同位素资料。为了评估板块的性质,菲律宾海板块(西菲律宾盆地,WPB),俯冲在九州至琉球弧之下,进行了海底调查,包括地形和ROV潜水。认为西段岩浆来源于类oib富集源幔。
项目成果
期刊论文数量(49)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Petrochemical evidence far diversity of magma compositions at the northwestern Ethiopian volcanic province
埃塞俄比亚西北部火山省岩浆成分的石化证据显示其多样性
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:Meshesha;A.D.
- 通讯作者:A.D.
松本 剛: "沖縄トラフ西端部における火山・熱水活動と中軸の「セグメント化」-「よこすか」・「しんかい6500」による"Lequios"航海成果速報-"JAMSTEC深海研究. 19. 95-107 (2001)
松本刚:《冲绳海槽西端的火山和热液活动以及中轴的‘分割’——‘横须贺’号和‘新海6500’号‘Lequios’航行结果的最新报告——》JAMSTEC Deep海洋研究。19。95-107(2001)
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Fluid bubbles in melt inclusions and pillow-rim glasses: high-temperature precursors to hydrothermal fluids?
- DOI:10.1016/s0009-2541(01)00383-7
- 发表时间:2002-03
- 期刊:
- 影响因子:3.9
- 作者:Vadim Kamenetsky;P. Davidson;T. Mernagh;A. Crawford;J. Gemmell;M. Portnyagin;R. Shinjo
- 通讯作者:Vadim Kamenetsky;P. Davidson;T. Mernagh;A. Crawford;J. Gemmell;M. Portnyagin;R. Shinjo
Petrology and petrogenesis of volcanic rocks from the Uegusukudake Formation in Kume-jima, central Ryukyu Arc.
琉球弧中部久米岛上岳岳组火山岩的岩石学和岩石成因。
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:Kitagawa;H. et al.
- 通讯作者:H. et al.
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SHINJO Ryuichi其他文献
SHINJO Ryuichi的其他文献
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{{ truncateString('SHINJO Ryuichi', 18)}}的其他基金
In situ boron isotopic analysis of subduction-related volcanic rocks and quantitative evaluation of subduction component
俯冲相关火山岩硼同位素原位分析及俯冲成分定量评价
- 批准号:
25400519 - 财政年份:2013
- 资助金额:
$ 2.11万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Boron and lithium isotopic compositions of phenocrysts in basalts: insight into heterogeneity of mantle wedge beneath South Kyushu, SW Japan
玄武岩中斑晶的硼和锂同位素组成:深入了解日本西南部九州南部下方地幔楔的异质性
- 批准号:
21540496 - 财政年份:2009
- 资助金额:
$ 2.11万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Geotectonic evolution of the West Philippine Basin: Petrological and geochemical characterization and interaction of spreading ridge with mantle plume upwelling
西菲律宾盆地的大地构造演化:岩石学和地球化学特征以及扩张脊与地幔柱上升流的相互作用
- 批准号:
17540458 - 财政年份:2005
- 资助金额:
$ 2.11万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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