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Research on Formation Environment of Metamorphic Volcanic of Maotang Group
Author(s): 
Pages: 301-309
Year: Issue:  4
Journal: Journal of East China Institute of Technology

Keyword:  扬子陆块 毛堂群 Rodinia超大陆 裂谷环境;
Abstract: 扬子陆块北缘毛堂群记录了Rodinia裂解事件的重要地质信息。从四个方面分析论证了毛堂群火山岩形成于新元古代中晚期大陆板内裂谷环境:(1)火山岩的地球化学特征,主要通过稀土及多元素配分模式体现;(2)火山岩的成岩年龄;(3)火山碎屑岩的特点;(4)基性火山岩构造环境判别图解。毛堂群裂谷火山活动是一次全球性的由地幔柱活动引发的裂谷火山事件群的组成部分,是南秦岭前寒武纪大陆裂解的先兆。
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