| 胶东半岛中生代构造演化的几何学和运动学 |
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| 引用本文： | 林伟,Michel Faure,王清晨.胶东半岛中生代构造演化的几何学和运动学[J].地质科学,2003,38(4):495-505,518. |
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| 作者姓名： | 林伟 Michel Faure 王清晨 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所岩石圈构造演化开放实验室 北京 100029;2. Dept. des Sciences de la Terre Université d’ Orléans UMR 6530 Orléans, France |
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| 基金项目： | 国家重点基础研究发展规划 (G1 9990 43 3 0 3 )，中国科学院留学经费择优支持回国工作基金，教育部的留学回国人员启动基金，国家自然科学基金项目 ( 4 0 1 73 0 0 1 )的资助 |
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| 摘 要： | 据岩石的变质相及变形特征可把胶东半岛分为5个地质单元,其构造几何关系由高至低为:1)板岩——砂岩单元;2)高压片麻岩——石英岩单元;3)大理岩——角闪岩单元;4)超高压变质单元,它经历了超过150km的深俯冲作用并快速折返至地表;5)片理化的混合岩穹隆单元,其为超高压变质单元叠加了混合岩化作用。这些构造单元均经历了相同的变形,具有NW指向的剪切特征。对比大别山构造学的研究结果,这种变形特征代表了超高压变质地体在折返过程中的运动学表现。混合岩穹隆中所残余含柯石英榴辉岩表明了胶东半岛和苏鲁地区具有相同的构造演化过程,烟台——青岛——五莲断裂不是华南板块与华北板块间的缝合带。
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| 关 键 词： | 几何学 运动学 中生代构造演化 混合岩穹隆 胶东半岛 |
| 文章编号： | 0563-5020(2003)04-0495-11 |
| 收稿时间： | 2002-01-23 |
| 修稿时间： | 2002-01-23; |
MESOZOIC GEOMETRY AND KINEMATICS IN THE JIAODONG PENINSULA AND ITS TECTONIC EVOLUTION |
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| Michel Faure.MESOZOIC GEOMETRY AND KINEMATICS IN THE JIAODONG PENINSULA AND ITS TECTONIC EVOLUTION[J].Chinese Journal of Geology,2003,38(4):495-505,518. |
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| Authors: | Michel Faure |
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| Institution: | 1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029;2. Dept. des Sciences de la Terre, Université d’Orléans, UMR 6530, Orléans, France |
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| Abstract: | The extensional tectonics in the Jiaodong Peninsula consisted of several stacked units, which were: according to the metamorphic facies and the deformation and from the top to the bottom, 1) a weakly metamorphosed slate sandstone unit in age of Neoprotozoic Paleozoic, 2) a gneiss quartzite unit metamorphosed under high pressure conditions, 3) a marble amphibolite unit, 4) an ultrahigh pressure unit that was very deeply subducted more than 150 km and then exhumated, and 5) a migmatite dome resulting from the melting of ultrahigh pressure rocks. All of these units underwent the same deformation, which was characterized by a top to the northwest extensional ductile shearing, during their exhumation. Granulite facies restites in the migmatite were not significantly different from granulitized eclogites derived from the ultrahigh pressure rocks. The migmatite exhibited the same structural and petrologic evolution as that determined for the other units. The Yantai Qingdao Wulian fault was not a suture between the North China and South China Blocks. |
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| Keywords: | Geometry Kinematics Mesozoic tectonic evolution Migmatite dome The Jiaodong Peninsula |
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