| 中国桐柏大别构造带变质演化的岩石学证迹 |
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| 关键词:Tongbai-Dabie tectonic belt metamorphic and deformational history PTt path post orogenic uplift reequilibrium texture |
| 基金项目:本文是国家自然科学基金重大项目49290100和面上项目49172090和国家计委国土司30届国际地质大会96-30-07专项成果之一，成文过程中与索书田、韩郁善、桑隆康、钟增球等进行了有益交流 |
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| The Petrology Evidence of Metamorphic Evolution in Tongbai-Dabie Tectonic Belt |
| Tongbai-Dabie tectonic belt, eastern extension of Qinling orogenic belt, experi-enced multistage evolutions under different tectonic regimes. The present Tongbai-Dabie area is composed of a collage of metamorphic terranes. The faults of ductile shear zones delimit these metamorphic terranes. Although each terrane has its own metamorphic and deformational history and unique PTt path, All terrane undergo common postorogenic up-lift in collison orogenic belt.
The paper presents the features of retrogressive metamorphism reeguilibrinm textures from coesite eclogite, kyanite gedrite schist and hypersthene garnet biotite gneiss in Suixi-an Group, Hongan Guroup and Dabie complex. Recent zircon U-Pb dating of the granulitic rock is 1699±128Ma
Reequilbrium textures in above rocks suggest a prominant post orogenic uplift in the Tongbai-Dabie tectonic-metamorphic belt. |
| You Zhendong,Chen Nengsong,Zhang Zeming.1996.The Petrology Evidence of Metamorphic Evolution in Tongbai-Dabie Tectonic Belt[J].Acta Geoscientica Sinica,17(z1):16-22. |
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