| 陕西陶湾群北侧剪切混杂带的确定及其地质意义 |
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| 引用本文： | 韩志勇,张寿广.陕西陶湾群北侧剪切混杂带的确定及其地质意义[J].地质论评,1995,41(3):221-228. |
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| 作者姓名： | 韩志勇 张寿广 |
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| 作者单位： | 中国地质科学院地质研究所 北京
(韩志勇)，中国地质科学院地质研究所 北京(张寿广) |
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| 基金项目： | 国家自然科学基金 (编号49290100)，地质矿产部“八五”攻关项目85-01-018-01课题 |
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| 摘 要： | 陕西境内的陶湾群和大片出露的寒牙纪地层之间，发育一套以千枚岩夹白云岩透镜体为主的复杂岩系。这套岩系实际上构成一个剪切混杂带，成为秦岭造山带和华北地台的界线，该带不是一个沉积地层单位，而应视为岩石－构造组合体，带内发育一系列冲断层，在洛南柏峪寺地区，从中可以分出３个构造岩片，其中的白云岩岩块为构造岩块。根据显微，小构造分析及岩性对比，认为冲断层由北向南逆冲，带内至少卷入有晚元古代大庄组，震旦纪罗圈组
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| 关 键 词： | 剪切混杂带 陶湾群 陕西 地层 寒武纪 |
CONFIRMATION AND IMPLICATION OF A SHEAR-MELANGE BELT TO THE NORTH OF THE TAOWAN GROUP IN SHAANXI |
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| Han Zhiyong and Zhang Shouguang.CONFIRMATION AND IMPLICATION OF A SHEAR-MELANGE BELT TO THE NORTH OF THE TAOWAN GROUP IN SHAANXI[J].Geological Review,1995,41(3):221-228. |
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| Authors: | Han Zhiyong and Zhang Shouguang |
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| Abstract: | In Shaanxi province there outcrops a complex rock series composed mainly of phyllite intercalated with lens -shaped dolomitite between Taowan Group and the Cambrian System. This rock series actually forms a shear-melange belt (SMB) the boundary between Qinling orogenic belt and North China Platform. The belt is not stratigraphic but tectonic unit. In Baiyushi area the belt can be divided into three tectonic slices separated by a series of thrusts. The tectogenetic dolomitite blocks occurring in the belt also can be regarded as secondary slices. According to analyses of microstructure, small -scale structure and lithologic comparison, the thrusts are believed to be moved southward and at least late Proterozoic Dazhuang Formation, Sinian Luoquan Formation and Middle - Lower Cambrian series and some of the Taowan Group were involved in the belt. Strong tectonic deformation resulted in fragmentation of the original strata and great changes in the sequence of strata. The shear-melange belt originated mainly in the Yanshanian Stage. |
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| Keywords: | north of the Taowan Group shear-melange belt (SMB) Shaanxi Province |
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