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Quantitative study on the volume of granitic melt, evolved by partial melting of pelitic metamorphic rocks

泥质变质岩部分熔融演化的花岗岩熔体体积定量研究

基本信息

批准号：
12640441
负责人：
SHIMURA Toshiaki
金额：
$ 2.37万
依托单位：
NIIGATA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640441/
关键词：
pelitic metamorphic rocks partial melting granite migmatite UHT metamorphic rock spinel + quartz rock crush Sタイプ花崗岩高温高圧実験グラニュライト

项目摘要

The aim of this research project is, to make clear about the volume of granitic melt that evolved by partial melting of pelitic metamorphic rocks. Therefore it is important to connect the metamorphic petrology with the igneous petrology.In the first year of the term on this project, I provide "the low contamination rock crushing laboratory". Therefore I bought a jaw-crusher and other rock-crushing equipments. This preparation is as good as done. But it had remained as a problem, that contamination of Cr from the jaw metal to some sample is not negligible, in case of such as acidic rocks.Scientific research has been done on the Hidaka Metamorphic Belt and on the Uetsu area. Especially, spinel + quartz assemblage is found from the Uetsu area, is one of the important results. It is the first finding from the Japanese Island. I revealed that such as the ultrahigh temperature metamorphism could be occur in the island-arc condition (Shimura et al., 2002 in press). Then we could describe the relation, such as the crustal materials and igneous rocks (Kagashima and Shimura, 2001). In the Hidaka Metamorphic Belt, corundum-andalusite-tourmaline pegmatite vein is fined out. It is important thing for the future study on the heat history of the Hidaka Crust.

这项研究的目的是弄清泥质变质岩部分熔融形成的花岗岩熔体的体积。因此，将变质岩石学和火成岩岩石学联系起来是非常重要的。在这个项目的第一年，我提供了“低污染岩石破碎实验室”。因此，我买了一台颌骨破碎机和其他碎石设备。这项准备工作已经差不多完成了。但它仍然是一个问题，在酸性岩石等情况下，颌骨金属对某些样品的铬污染是不可忽视的。已经在东高变质带和Uetsu地区进行了科学研究。特别是在Uetsu地区发现的尖晶石+石英组合，是其中的重要成果之一。这是日本岛屿上的第一次发现。我揭示了在岛弧条件下可以发生这样的超高温变质作用(Shimura等人，2002年出版)。然后我们可以描述这种关系，比如地壳物质和火成岩(Kagashima and Shimura，2001)。在东高变质带中，刚玉-红柱石-电气石伟晶岩脉被磨碎。这对进一步研究东高地壳的热史具有重要意义。