| 大别造山带东部燕山晚期区域变质－岩浆活动与区域构造抬升的同位素地质年代学证据 |
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| 引用本文： | 简平,马昌前,杨坤光.大别造山带东部燕山晚期区域变质－岩浆活动与区域构造抬升的同位素地质年代学证据[J].地球科学,1996(5). |
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| 作者姓名： | 简平 马昌前 杨坤光 |
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| 作者单位： | 宜昌地质矿产研究所，地球科学学院 |
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| 摘 要： | 应用Ｒｂ－Ｓｒ同位素地质年代学方法，系统地研究了大别山东部两类不同构造环境（同构造花岗岩和非构造花岗岩）成因的花岗岩及大别杂岩混合二长片麻岩的冷却就位和构造－变质时代．结合区域上大别杂岩和花岗岩已有的同位素地质年代学成果分析，结果表明：（１）大别山东部燕山晚期区域变质－混合岩化－岩浆活动是同一构造－热事件的产物；（２）大别杂岩与中生代花岗岩具有相似的热历史，中下地壳大别杂岩的出露是燕山晚期区域构造抬升的结果
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| 关 键 词： | 大别山，燕山晚期，同位素地质年代学 |
GEOCHRONOLOGIC EVIDENCES OF YANSHANIAN METAMORPHISM- MAGMATISM-TECTONIC UPLIFTING IN THE EASTERN DABIE AREA,CENTRAL CHINA |
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| Jian Ping.GEOCHRONOLOGIC EVIDENCES OF YANSHANIAN METAMORPHISM- MAGMATISM-TECTONIC UPLIFTING IN THE EASTERN DABIE AREA,CENTRAL CHINA[J].Earth Science-Journal of China University of Geosciences,1996(5). |
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| Authors: | Jian Ping |
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| Abstract: | Rb-Sr dating has been made for granites and migmatic gneiss from eastern Dabiecomplex,central China.These results and previous geochronologic evidences from Dabie area show that:(1)regional metamorphism-migmatism and granitic magmatism occurred contemporaneously due to same tectonothermal event in the area.(2) The thermal histories of Dabie complex and granites are similar,indicating the exhumation of Dabie terrane caused by rapid tectonic uplifting during Late Yanshanian episode. |
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| Keywords: | Dabie Mountains Late Yanshanian episode isotopic geochronology |
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