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引用本文:戴圣潜1,2 邓晋福1 吴宗絮3 赵海玲1 陈江峰4 杜建国2. 大别造山带燕山期造山作用的岩浆岩石学证据[J]. 中国地质, 2003, 30(2): 159-165.
DAI Sheng-qian1,2,DENG Jin-fu1,WU Zong-xu3,ZHAO Hai-ling1,CHEN Jiang-feng4,DU Jian-guo2. Evidence of magmatic petrology for the Yanshanian orogeny in the Dabie orogen[J]. Geology in China, 2003, 30(2): 159-165(in Chinese with English abstract).
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大别造山带燕山期造山作用的岩浆岩石学证据
戴圣潜1,2 邓晋福1 吴宗絮3 赵海玲1 陈江峰4 杜建国21,2,3,4
1.中国地质大学,北京 100083;2.安徽省地质调查院,安徽 合肥 230001;3.国家地震局地质研究所,北京,100029;4.中国科技大学,安徽 合肥 230026
摘要:
提要:在区域地质填图基础上研究了大别地区燕山期岩浆岩,重新划分了该区燕山期岩浆作用期次,发现大别地区在燕山期存在一个完整的造山岩浆旋回。首次提出本区燕山晚期岩浆岩为双峰式组合,与燕山早期岩浆岩属高钾钙(碱)性-钾玄岩组合一起构成一个从挤压到伸展的造山岩浆旋回,成为燕山期造山的重要佐证。岩浆岩成因特点揭示出本区的岩石圈结构在燕山期存在一个从双倍陆壳到正常陆壳的过程,深部地质过程则是底侵作用和拆沉作用的继续。
关键词:  大别造山带  燕山期  岩浆岩  造山作用  钾玄岩
DOI:
分类号:
基金项目:国家自然科学基金项目(49772155);原地质矿产部“九五”重大科技项目(9501102-03); 中国地质调查局综合研究项目(200113900018)资助。
Evidence of magmatic petrology for the Yanshanian orogeny in the Dabie orogen
DAI Sheng-qian1,2,DENG Jin-fu1,WU Zong-xu3,ZHAO Hai-ling1,CHEN Jiang-feng4,DU Jian-guo21,2,3,4
1.China University of Geosciences, Beijing 100083, China;2.Anhui Institute of Geological Survey, Hefei 230001, Anhui, China;3.Institute of Geology, State Seismological Bureau, Beijing 100029, China;4.University of Science and Technology of China, Hefei 230026, China
Abstract:
Abstract:On the basis of regional geological mapping, the authors studied Yanshanian rocks in the Dabie area, re-determined the phases of Yanshanian magmatism and found the existence of a complete orogenic magmatic cycle in the area. They for the first time propose that the late Yanshanian magmatic rocks in the area constitute a bimodal association, which combines with the early Yanshanian magmatic rocks (belonging to high-K calc-alkaline-shoshonitic association) to form a compressional to extensional orogenic magmatic cycle. This is important evidence of Yanshanian orogeny. The features of origin of magmatic rocks have revealed that the lithosphere structure in the area experienced a process from double continental crust to normal continental crust in the Yanshanian stage. The deep geological process was the continuation of underplating and delamination.
Key words:  Dabie orogenic belt  Yanshanian stage  magmatic rock  orogeny  shoshonite