| 华南东段加里东期花岗岩类形成构造背景探讨 |
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| 引用本文： | 张芳荣,舒良树,王德滋,于津海,沈渭洲.华南东段加里东期花岗岩类形成构造背景探讨[J].地学前缘,2009,16(1):248. |
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| 作者姓名： | 张芳荣 舒良树 王德滋 于津海 沈渭洲 |
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| 作者单位： | 南京大学地球科学与工程学院;江西省地质调查研究院; |
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| 基金项目： | 国家自然科学基金项目(40634022,40572118);;教育部博士点基金项目(20060284008) |
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| 摘 要： | 根据近年对区域地质调查取得的认识和前人的研究成果,研究了华南东段加里东期花岗岩类的地质产状、分布规律、形成时代以及Nd、Sr同位素特征;结合研究区超镁铁质-镁铁质岩及火山岩的形成时代、震旦纪—奥陶纪的沉积环境、加里东期构造事件的构造变形特征,对加里东期花岗岩类的形成背景进行了探讨。结果表明,加里东期花岗岩类形成于410～460Ma,大部分岩体属于S型花岗岩,岩浆来源于地壳物质的部分熔融;极少数为I型花岗岩,有幔源物质参与。研究区在早古生代不存在与俯冲有关的弧火山岩,也不存在大面积的早古生代I型花岗岩,震旦纪—奥陶纪地层主要形成于浅海环境。研究提出,加里东期花岗岩类主体形成于板内构造环境。
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| 关 键 词： | 花岗岩类 地质特征 构造背景 加里东期 华南东段 |
Discussions on the tectonic setting of Caledonian granitoids in the eastern segment of South China |
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| Zhang Fangrong,Shu Liangshu,Wang Dezi,Yu Jinhai,Shen Weizhou .School of Earth Sciences , Engineering,Nanjing University,Nanjing ,China.Geological Inquiry , Investigation Institute of Jiangxi Province,Nanchang ,China.Discussions on the tectonic setting of Caledonian granitoids in the eastern segment of South China[J].Earth Science Frontiers,2009,16(1):248. |
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| Authors: | Zhang Fangrong Shu Liangshu Wang Dezi Yu Jinhai Shen Weizhou School of Earth Sciences Engineering Nanjing University Nanjing ChinaGeological Inquiry Investigation Institute of Jiangxi Province Nanchang China |
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| Institution: | Zhang Fangrong1,2,Shu Liangshu1,Wang Dezi1,Yu Jinhai1,Shen Weizhou1 1.School of Earth Sciences , Engineering,Nanjing University,Nanjing 210093,China2.Geological Inquiry , Investigation Institute of Jiangxi Province,Nanchang 330030,China |
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| Abstract: | Based on our newly first-hand data obtained recently from regional geological survey and previous research results, we have analyzed in detail the geological features, distribution, forming ages and Nd-Sr isotopic characteristics of Caledonian granitoids in the eastern segment of South China.The tectonic setting forming Caledonian granitoids were discussed, which includes the ages of ultramafic-mafic rocks and volcanic rocks that outcrop in the study areas, the deposited environment of sedimentary rocks dur... |
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| Keywords: | granitoids geological features tectonic setting Caledonian period eastern segment of South China |
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