首页|The Formation of Yanshanian Granitic Magma in Dabie Mountains:Dehydration or Aquifer Melting with Tiantangzhai and Jiuzihe Granites as Examples

The Formation of Yanshanian Granitic Magma in Dabie Mountains:Dehydration or Aquifer Melting with Tiantangzhai and Jiuzihe Granites as Examples

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There are large-areas of late Yanshanian granites in the Dabie Orogen, but the formation mode of the relevant granitic magma is still under discussion. Taking the typical Yanshanian granites in the North Dabie Block The TG and JG as examples, the Writers endeavor to discuss contain aspects of the formation mode of the granitic magma by studying the characteristics of the chemical compositions of biotite and amphibole of the granites and petrological features of enclaves in the intrusions, in the light of recent results of experimental petrology on dehydration melting and aquifer melting. It is suggested that: (1) Some biotites in the Tiantangzhai and the JGs and their enclaves were residual minerals; (2) Some of the amphiboles could be new-born minerals, and others, residual ones.(3) the banded bodies in granites were residuals of anatexis. (4) The TG and JG were formed by aquifer melting, and the South Dabie Block could be the important source region of water.

petrogenesis of granitedehydration meltingaquifer meltingenclaves characteristicsaquifer fluidthe Dabie Orogen

WANG Qiang、ZHAO Zhenhua、QIU Jiaxiang、WANG Renjing、XU Jifeng

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Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, P.R.C, 510640

China University of Geosciences, Wuhan , P.R.C, 430074

This research was the Knowledge Innovation Program of Chinese Academy of Sciences国家重点基础研究发展计划(973计划)国家攀登计划

KZCX2-102G199904320295-Y-25

2001

大陆动力学(英文版)

大陆动力学(英文版)

ISSN：1006-7825
年,卷(期)：2001.6(2)
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