Minute examination of metamorphic and restite-formation processes in the Island-arc and continental lower crusts

岛弧和大陆下地壳变质和复位矿形成过程的详细检查

• 批准号: 09440176
• 负责人: OSANAI Yasuhito
• 金额: $ 9.34万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09440176/
• 关键词: Ultrahigh-T metamorphism; Partial melting; Restite; Isotopic age; Spinel + Quartz; Sapphirine granulite; Gondwana supercontinent; Napier Complex; 肥後変成帯; 黒瀬川帯; スリランカ; サフィリン+石英; 斜方輝石+珪線石; 日高変成帯; High-T netrinorphic rock; Partial Melting; Gra

The main focus of this research program was the minute study of metamorphic and restiteformation processes among the island-arc and continental type lower crusts as seen the high-and ultrahigh-temperature metamorphic terrane in Japan (Hidaka metamorphic belt, Higo metamorphic terrane and Kurosegawa belt) and in Gondwana fragments (Antarctica, Sri Lanka and India).For the domestic high-and ultrahigh-temperature metamorphic terranes, garnet-orthopyroxene granulite and sapphirine-bearing granulite from the Hidaka and Higo terranes were re-examined to understand the process of restitic natures and related granitic magma genesis. Especially in the Higo terrane, the high-grade metamorphic rocks compared with East Asian regional metamorphic rocks through the geological, petrological and geochronological investigations. Another metamorphic and chronological studies also carried out for the Kurosegawa belt in Kyushu. The results include the finding of UHT-mafic granulite up to 950℃ and 1000MPa … More and Pan African age of 540Ma using Um-Nd whole rock isochron.Antarctica, Sri Lanka, and India as the Gondwana fragments were also treated. The most detailed geological mapping for the Archean high-grade metamorphic terrane have done at Tonagh Island in the Napier Complex, East Antarctica. After the completion of the geological map, detailed investigations of metamorphic process of YHT-metamorphic rocks including P-T-t path analyses and variety on the origin of sapphirine granulites were also carried our In Sri Lanka, characteristic spinel+quartz coexistence was newly found. It shed a light on the evolution of Sri Lankan basement rocks with studies of Sm-Nd geo chronology. And during the examination of partial melting process of high-grade metamorphic rocks in Eastern Ghats, India, new magmatic charnockites (C-type) and their isotopic ages were clearly identified.A part of the results were published as 31 articles of journal papers and 37 oral and poster presentations, not only domestic but also international meetings. Less

该研究计划的主要重点是对日本的高和超高的变质地块（Hidaka Metamorphic腰带，Higo Metamorphic Metamorphic teramorphic terrane and Kurosegawa belt）的高度和超高的变质地层，对岛 - 阿拉伯和连续类型之间的变质和重复形成过程进行了少量研究。来自Hidaka和Higo Terranes的超高年代的变质层，石榴石 - 非拷贝颗粒和含Sapphirine的颗粒颗粒是重新检查的，以了解可恢复性质和相关的花岗岩岩浆生殖的过程。尤其是在希戈尔地座上，高级变质岩与东亚区域变态岩石相比，通过地质，岩石学和年代学研究。另一项变质和年代学研究也针对九州的Kurosegawa带进行了。结果包括使用UM-nd全岩等岩，Antarctica，Sri Lanka和India的UHT-MAFIC颗粒含量高达950℃和1000MPA…540mA的泛非年龄和泛非年龄。大将高级变质地层最详细的地质地图是在南极洲东部纳皮尔综合体的托纳岛（Tonagh Island）所做的。完成地质图后，还对我们在斯里兰卡（Sri Lanka）进行了对sapphirine颗粒的YHT超态岩石的变质过程的详细研究。它通过SM-ND地质学研究来阐明斯里兰卡地下岩石的演变。在检查东高止山脉高级变质岩石的部分熔化过程中，清楚地鉴定出了31篇期刊论文和37篇口头和海报的陈述，但不仅在国内开会，但还清楚地确定了结果的一部分结果。较少的

项目成果

Osanai,Y.et al.: "Geological fieldwork of the southwestern and central part of the Highland Complex, Sri Lanka during 1998-1999, with special reference to the highest-grade metamorphic rock"Jour.Geosci.Osaka City Univ.. 43(印刷中). (2000)

Osanai,Y.et al.：“1998-1999 年斯里兰卡高原杂岩体西南和中部的地质实地考察，特别提到最高品位的变质岩”Jour.Geosci.Osaka City Univ.. 43 （正在出版）。

Osanai,Y.et al.: "The Higo high-grade metamorphic rocks in Japan as a part of the collisional terrane between the Sino-Korean and Yangtze cratons"Gondwana Research. 2. 599-601 (1999)

Osanai，Y.et al.：“日本肥后高级变质岩是中朝克拉通和扬子克拉通碰撞地体的一部分”冈瓦纳古陆研究。

Owada, M.: "Special and temporal variations for the Mesozoic granitic rocks in the Kyushu, southwest Japan"Tectonic Evolution of Ease Asia (eds. H.J. Koh and B.J. Lee). 89-94 (1998)

Owada, M.：“日本西南部九州中生代花岗岩的特殊和时间变化”东亚构造演化（H.J. Koh 和 B.J. Lee 编辑）。

小山内 康人: "肥後変成帯の帰属はなにか?-東アジアの広域変成岩との関連性についての予察-"九州テクトニクスワーキンググループ連絡誌. 1. 11-18 (1997)

小山内泰人：“肥后变质带的归属是什么？-其与东亚广域变质岩关系的预测-”九州构造工作组杂志1. 11-18 (1997)。

Yoshida,M.et al.: "Field studies of Proterozoic terrains in peninsular India and Sri Lanka during 1997-1998"Jour.Geosci.Osaka City Univ.. 42. 179-203 (1999)

Yoshida,M.et al.：“1997-1998 年印度半岛和斯里兰卡元古代地形的实地研究”Jour.Geosci.Osaka City Univ.. 42. 179-203 (1999)