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

这项研究的重点是对日本高温和超高温变质地体(日达卡变质带、HIGO变质地体和黑河带)以及冈瓦那碎屑(南极、斯里兰卡和印度)的岛弧和陆地型下地壳之间的变质形成过程进行详细的研究。对于国内高温和超高温变质地体，重新研究了来自日达卡和东吴地体的石榴石斜方辉石麻粒岩和含蓝宝石麻粒岩的形成过程。特别是在HIGO地体中，通过地质、岩石学和年代学研究，将高级变质岩与东亚区域变质岩进行了对比。另外还对九州黑河带进行了变质作用和年代学研究。结果表明，超高温镁铁质麻粒岩的发现可达950℃和1000 Mpa…。More和泛非540 Ma采用Um-ND全岩等时线。南极洲、斯里兰卡和印度作为冈瓦那的碎片也进行了处理。在东南极纳皮尔杂岩的托纳岛完成了对太古宙高级变质地体最详细的地质填图。地质填图完成后，还对斯里兰卡YHT变质岩的变质过程进行了详细的研究，包括P-T-t轨迹分析和蓝宝石麻粒岩成因的变化，新发现了尖晶石-石英共生的特征。通过对Sm-ND地质年代学的研究，揭示了斯里兰卡基底岩石的演化。在印度东高止高级变质岩部分熔融过程的研究中，发现了新的岩浆辉绿岩(C型)及其同位素年龄。部分成果以31篇期刊论文和37篇口头和海报形式发表，不仅在国内，还在国际会议上发表。较少

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