国外陆壳岩石缺乏流体熔融实验和模拟的主要成果

doi:10.11867/j.issn.1001-8166.1997.02.0144

地球科学进展 ›› 1997, Vol. 12 ›› Issue (2): 144 -151. doi: 10.11867/j.issn.1001-8166.1997.02.0144

徐启东

中国地质大学武汉 430074

收稿日期:1996-06-28 修回日期:1996-10-23 出版日期:1997-04-01
通讯作者: 徐启东,男,1957年3月出生,副教授,主要从事区域地球化学、矿床学和流体地质学方面的研究。

FLUID-ABSENT MELTING EXPERIMENT AND MODELING OF CRUSTAL ROCKS:MAJOR RESULTS AND IMPLICATION FOR STUDY OF GRANITOIDS

XU Qidong

China University Of Geosciences,Wuhan 430074

Received:1996-06-28 Revised:1996-10-23 Online:1997-04-01 Published:1997-04-01

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近20年来人们越来越认识到,陆壳岩石缺乏流体熔融(fluid-absent melting)是花岗岩类岩石形成的重要机制。近10年来国外有关花岗岩类的实验模拟大多集中于研究在大陆中下部地壳深度内,主要陆壳岩石类型发生缺乏流体熔融所涉及的熔融反应类型、反应形成的熔融数量及有利条件等问题。综述了实验模拟研究的主要成果和对花岗岩类研究提供的某些限制和意义。强调对具体地区花岗岩类的成因研究要充分考虑不同源岩缺乏流体熔融可能产生的熔体数量、区域
岩石圈物质和能量调整能否导致高热状态的限制等因素。

关键词: 花岗岩类, 缺乏流体熔融, 熔融实验和模拟, 陆壳岩石, 矿化度, 变质系数, 断面压力, 封闭性, 断裂

Fluid-absent melting of crustal rocks as an important mechanism of genesis of granitoids has been known for twenty years. During recent ten years experimental melting and modeling associated with granitoids mainly were focused on melting reactions, melt fraction produced and favourable conditions in fluid-absent melting of crustal rocks. This paper summarizes the major results from fluid-absent melting experiment and modeling and those results constrain on the genesis of granitoids. It is suggested that study of genesis of granitoids in a special area must consider the melt fraction produced by fluid-absent melting of different rocks, if high-heat state can be retained by mass and energy transport in the regional lithosphere, and considered that simple applications of general criteria of I-and S-type granitoids to identifying the relations between genetic classifications and source rocks is not suitable.

Key words: Granitoids, Fluid-absent melting, Melting experiment and modeling, Continental crust rocks.

中图分类号:

P588.11

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