| 桂东南云开变质地区的大地构造特征 |
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| 引用本文： | 蔡贺清,康云骥.桂东南云开变质地区的大地构造特征[J].南方国土资源,2002,15(2):1-6. |
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| 作者姓名： | 蔡贺清 康云骥 |
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| 作者单位： | 广西地勘总院基础地质调查院,广西,桂林,541003 |
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| 摘 要： | 桂东南云开地区的基底主要由前寒武纪变质表壳岩与变形变质花岗岩组成 ,晚古生代、中生代盖层相当薄。该地块形成于晚前寒武纪 ,它在古生代向北运移并同时发生左旋旋转。这一事件奠定了该区的构造格局。在中二叠世末的东吴运动期间 ,该地块作为一个变质地体最终与钦州沉积地体拼合。文章重新对云开地区的大地构造特征进行了认识 ,认为该区的变质基底中存在晋宁期甚至前晋宁期地质体及相应的地质事件
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| 关 键 词： | 变质岩 韧性剪切带 灵山构造带 桂东 |
| 文章编号： | 1003-7861(2002)02-0001-06 |
| 修稿时间： | 2002年1月23日 |
TECTONIC FEATURE OF THE YUNKAI METAMORPHIC AREA, SOUTHEAST GUANGXI |
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| Authors: | CAI He-qing KANG yun-ji |
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| Abstract: | The base of Yunkai block in Southeast Guangxi is mainly composed of Pre-Cambrian metamorphic crust-rock and deformed-metamorphic granite. Its late-Paleaozoic and Mesozoic cover is very thin. After it formed in late Pre-Cambrian, Yunkai block had been moving northwards in Paleaozoic while rotating counterclockwise. This event got the structural pattern of this block. And as a metamorphic terrane, the Yunkai block amalgamated to Qingzhou sedimental terrane in the period of Dongwu movement in the end of middle Permian. Here we recognize the tectonic feature of Yunkai area and conclude that there are Jingning (maybe Pre-Jingning) geological bodies and geological event in the metamorphic base of Yunkai area. |
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| Keywords: | metamorphic rock ductile shear zone Lingshan structure zone Southeast Guangxi |
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