| 关于华南推覆构造的商榷 |
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| 引用本文： | 陈江峰,周泰禧,邢凤鸣,徐祥,K.A.Foland.关于华南推覆构造的商榷[J].中国科学技术大学学报,1991(3). |
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| 作者姓名： | 陈江峰 周泰禧 邢凤鸣 徐祥 K.A.Foland |
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| 作者单位： | 中国科学技术大学
(陈江峰，周泰禧)，安徽省地质科学研究所
(邢凤鸣，徐祥)，美国俄亥俄州州立大学(K.A.Foland) |
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| 摘 要： | 根据前寒武纪花岗岩以及青白口纪火山岩与上(板)溪群之间的侵入接触关系,确定上溪群形成年龄为中元古代。皖南与赣东北蛇绿岩套的Sm-Nd定年结果为约1.0Ga。因此华南地块于中生代推覆到扬子地块上的模式不符合基本的地质事实。现有资料支持华夏和扬子两地块在晚元古代碰撞拼合的解释。
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| 关 键 词： | 大地构造学 蛇绿岩 板溪群 皖南 赣东北 |
A Discussion on Mesozoic Overthrust in South China |
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| Chen Jiangfeng Zhou Taixi.A Discussion on Mesozoic Overthrust in South China[J].Journal of University of Science and Technology of China,1991(3). |
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| Authors: | Chen Jiangfeng Zhou Taixi |
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| Abstract: | Precambrian granodiorite aged about 900 Ma from southern Anhui and northeastern Jiangxi provinces is intruded into Banxi group low grade metamorphic rocks. The Banxi group rocks are found in the Puling formation (Qingbeikou series) volcanics as xenoliths. Therefore, the Banxi group is older than 900 Ma. Based on the Sm-Nd mineral isochron, it is found that Fuchuan ophiolite from southern Anhui is about 935 Ma old and Zhangshudung ophiolite from northeastern Jiangxi about 1034 Ma old. Proterozoic ophiolite and Banxi rocks cannot be explained by a mesozoic collision. Geologic observations and Sm-Nd isotopic dates presented in this paper and by others do not support the south China overthrust model.The data offered here favor that the collision between the Yangtze and Cathysia blocks happened in the late Proterozoic era. |
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| Keywords: | tectonics ophiolite Banxi group southern Anhui northeastern Jiangxi |
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