Exhumation path of metamorphic rocks and the development of the orogenic belt

变质岩折返路径与造山带的发育

• 批准号: 11640477
• 负责人: HIRAJIMA Takao
• 金额: $ 2.3万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640477/
• 关键词: Schreinemakers'bundle; petrogenetic grid; computer program; ultra-high pressure rocks; Schreinemakersの束; 超高圧変成作用; 三波川変成帯

1) Improvement of computer program for making petrogenetic grids based on Schreinemakers' bundle, which can draw grids automatically in the system with more than (C+4) phases for DOS-V machine, as the previous computer program has disadvantage for drawing the grid in the system with more than (C+4) phases. We corded the new program and opened it (Yoshida and Hirajima, 1999).2) Improvement of observation method for macroscopic textures mainly composed of cmsize crystal, of which observation method was not established. Newly improved digital scanner system was introduced for this purpose. This system can improve them acroscopic observation with large crystal.3) Investigation of PTH path of metamorphic rocks combining with newly constructed software based on Schreinemakers' method, the software based on comprehensive thermodynamic data base and macroscopic texture observation system.a) Petrogenetic grid defining the stability field of talc-phengite assemblage based on the petrological study of the Sanbagawa schists (Izadyar et al., 2000).b) Identification of the regional scale isothermal decompression path from the Su-Lu UHP belt (publication ; Nakamura ＆ Hirajima, 2000 ; Banno et al., 2000 : oral presentation ; Hirajima et al., 2000 at Western Pacific Geophysical Meeting, Tokyo) c) Precise determination of the prograde path of Italian UHP rocks using the inclusion assemblages and model petrogenetic grids (Compagnoni ＆ Hirajima, in press).

1)对基于Schreinemakers束的成岩网格生成程序进行了改进，针对原程序在绘制多相系统网格时存在的不足，在DOS-V机上实现了多相系统网格的自动绘制。我们编写了新的程序并将其打开（Yoshida and Hirajima，1999）。2）改进了以厘米级晶体为主的宏观织构的观测方法，这种织构的观测方法尚未建立。为此，引进了新改进的数字扫描仪系统。3）结合新开发的基于Schreinemakers方法的软件、基于综合热力学数据库的软件和宏观结构观测系统，对变质岩的PTH轨迹进行了研究。a）在对三坝川片岩（Izadyar等，2000）。B）苏鲁超高压带区域尺度等温减压路径的识别（出版物;中村和平岛，2000年; Banno等人，2000年：口头报告; Hirajima等人，c）使用包体组合和模型岩石成因网格精确确定意大利超高压岩石的俯冲路径（Compagnoni & Hirajima，出版中）。

项目成果

Izadyar,J.,Hirajima,T.,and Nakamura,D.,: "Talc-phengite-albite assemblage in piemontite quartz schist of the Sanbagawa metamorphic belt in central Shikoku, Japan."The Island Arc,9,145-158.. 9. 145-158. (2000)

Izadyar, J.、Hirajima, T. 和 Nakamura, D.，：“日本四国中部三波川变质带的皮蒙特岩石英片岩中的滑石-多硅白云母-钠长石组合。”岛弧，9,145-158.. 9

Yoshida, D., and Hirajima, T.: "The argorithm for drawing petrogenetic grids with Schreinemakers' method."Jour.Min.Pet.Econ.Geol. 94 (in Japanese with English Abstract). 254-260 (1999)

Yoshida, D. 和 Hirajima, T.：“用 Schreinemakers 方法绘制成岩网格的算法。”Jour.Min.Pet.Econ.Geol。

Matsumoto N.and Hirajima T.: "Garnet in pelitic schists from a quartz eclogite unit of the southern Dora-Maira massif"western Alps. Schweizerische Mineralogische und Petrographische Mitteilungen. 80. 53-62 (2000)

Matsumoto N. 和 Hirajima T.：“来自 Dora-Maira 地块南部石英榴辉岩单元的泥质片岩中的石榴石”西阿尔卑斯山。

Banno,S.,Enami,M.,Hirajima,T.,and others: "Decompression P-T path of coesite eclogite to granulite from Weihai, easterm China."Lithos. 52. 97-108 (2000)

Banno，S.，Enami，M.，Hirajima，T.，等人：“中国东部威海柯石英榴辉岩到麻粒岩的减压 P-T 路径。”Lithos。

Matsumoto N.and Hirajima T.,: "Garnet in pelitic schists from a quartz eclogite unit of the southern Dora-Maira massif, western Alps."Schweizerische Mineralogische und Petrographische Mitteilungen.. 80. 53-62 (2000)

Matsumoto N. 和 Hirajima T.，：“来自阿尔卑斯山西部 Dora-Maira 地块南部石英榴辉岩单元的泥质片岩中的石榴石。”Schweizerische Mineralogische und Petrographische Mitteilungen.. 80. 53-62 (2000)