Progressive change of mineral composition in metabasite along low- to high-P/T metamorphic facies series

变碱岩中矿物成分沿低至高P/T变质相系列的渐进变化

• 批准号: 61540588
• 负责人: MARUYAMA Shigenori
• 金额: $ 1.34万
• 依托单位: Toyama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61540588/
• 关键词: Metamorphic facies; metamorphic facies series; metabasite; progressive change of mineral; composition; geothermobarometry; tectonics; Asia; 変成反応; 鉱物組合せ; 固溶体組成

It has long been well-known since late 1950s' that metabasite is more sensitive than metapelite to the change of metamorphic grade at t lower than 400 ゜C. However, such characters of metabasite and itsmineral composition have been clarified after 1980 by the extensive use of microprobe. This Project belongs to this flow of study, and is composed of three parts; experimental petrolgy, study of metamorphic belt, and related tectonics.In part I, petrogenetic grid of metamorphic facies was determined at P<10kb, and T>500 ゜C at Stanford University. The facies boundaries bewteen zeolite and prehnite-pumpellyite(PP) facies, PP and pumpellyite-actinolite(PA) facies, PA and greenschist(GS) facies, prehnite-actinolite facies and GS facies, and blueschist and GS facies. In addition, the thermodynamic calculation of the sliding equilibria by the introduction of ferric iron for such transition was achieved.In part II, the progressive change of mineral composition with increasing metamorphic grade along the lowest P/T facies series(Karmutsen, Vancouver island, Canada), high-pressure intermediate facies series(Sanbagawa belt, Japan), and highest-P/T of Franciscan, California, were studied. A comprehensive summary was also achieved.In part III(application of this study), the uplifting tectonics of the deep-seated accretionary complex, orgeny, tectonic development of the Japanese lslands, and tectonics of Asia were given, following metamorphic aspects of particular rock units.All of these results are arranged following the year published. Only abstracts of papers presented in 1988 and 1989 are shown in the last part of this report.

自20世纪50年代末以来，人们早就知道，在低于400℃时，变质岩比变质长岩对变质品位的变化更敏感。1980年以后，显微探针的广泛应用澄清了变质岩的这些特征及其矿物组成。本项目属于这一研究流程，由三个部分组成；实验岩石学，变质带及相关构造学研究。第一部分，在斯坦福大学（Stanford University）的P<10kb和T < 500c处确定了变质相的成岩网格。沸石与前亚硝酸盐-泵质岩（PP）相、PP与泵质岩-放光石（PA）相、PA与绿片岩（GS）相、前亚硝酸盐-放光石相与GS相、蓝片岩与GS相的相界。此外，还对引入三铁后的滑移平衡进行了热力学计算。第二部分研究了最低P/T相系列（加拿大温哥华岛karmusen）、高压中间相系列（日本Sanbagawa带）和最高P/T相系列（美国加利福尼亚州Franciscan）的矿物组成随变质等级的逐渐变化。还进行了全面的总结。第三部分（本研究的应用）给出了深埋增生杂岩的隆升构造、成因、日本列岛的构造发育和亚洲构造，以及特定岩石单元的变质作用。所有这些结果都是按照出版年份排列的。本报告的最后一部分只列出1988年和1989年提交的论文摘要。

项目成果

Maruyama,S.;Liou,J.G.;Coleman,R.G.Dobretsov,N.: J.Geology.

Maruyama，S.；Liou，J.G.；Coleman，R.G.Dobretsov，N.：地质学杂志。

Tatsumi,Y.;Maruyama,S.: "Boninites"Boninites and high-magnesian andesites:Tectonics and petrogenesis" Elsevier, (1989)

Tatsumi，Y.；Maruyama，S.：“Boninites”Boninites 和高镁安山岩：构造和岩石成因”Elsevier，（1989）

Tatsumi,Y.;Maruyama,S.: "Boninites(ed.by Crawford,A.L.),"Boninites, and high-magnesian andesites:Tectonics, and petrogenesis" Elsveier, (1989)

Tatsumi，Y.；Maruyama，S.：“Boninites（由 Crawford，A.L. 编辑）”，“Boninites 和高镁质安山岩：构造和岩石成因”Elsveier，（1989）

Cho,M.;Liou,J.G.;Maruyama,S.: Contributions to Mineralogy and Petrology. (1987)

Cho,M.；Liou,J.G.；Maruyama,S.：对矿物学和岩石学的贡献。

Maruyama,S.;Liou,J.G.: Tectonophysics. (1988)

Maruyama，S.；Liou，J.G.：构造物理学。