摘要
通过详细的野外地质构造调查和对前人大量资料的综合研究,在辽东半岛南部共识别出4个变质核杂岩体,分别为金州变质核杂岩、万福变质核杂岩、新房变质核杂岩和栗子房变质核杂岩.其中新房变质核杂岩和栗子房变质核杂岩是本次首次发现并提出的.它们在形成时间和运动学特征上既具有相似性,又有一定的差异.宏、微观运动学特征表明,金州、新房变质核杂岩总体为上盘相对下盘由东向西剪切滑移,万福、栗子房变质核杂岩总体由西向东剪切滑移.通过对辽东半岛南部变质核杂岩的演化过程、形成模式及形成机制综合分析得出,金州变质核杂岩、新房变质核杂岩、万福变质核杂岩和栗子房变质核杂岩均形成于早白垩世华北克拉通破坏峰期,Izanagi板块与欧亚板块之间的交互作用是其形成的重要因素.
Through detailed geological structure survey and comprehensive study on large amounts of previous data,4 metamorphic core complexes(MCC)are identified in the southern Liaodong Peninsula,namely Jinzhou MCC,Wanfu MCC,Xinfang MCC and Lizifang MCC,among which the latter two are newly discovered.They have both similarities and differences in formation time and kinematic characteristics.The macro and micro kinematic characteristics show that the relative movement of hanging wall to footwall of Jinzhou MCC and Xinxin MCC is generally shearing slide from east to west,while that of Wanfu MCC and Lizifang MCC is shearing slide from west to east.By comprehensively analyzing the evolution process,formation model and formation mechanism of the MCCs in southern Liaodong Peninsula,it is concluded that they were all formed in the Early Cretaceous destructive peak of North China Craton,with the interaction between Izanagi Plate and Eurasian Plate as one of the important factors for their formation.
作者
仲米山
张国仁
杨中柱
高福亮
吴子杰
潘玉啟
高永钊
王煊
王然
ZHONG Mi-shan;ZHANG Guo-ren;YANG Zhong-zhu;GAO Fu-liang;WU Zi-jie;PAN Yu-qi;GAO Yong-zhao;WANG Xuan;WANG Ran(Liaoning Institute of Geological Exploration Co.,Ltd.,Dalian 116100,Liaoning Province,China;Shenyang Center of China Geological Survey,Shenyang 110034,China)
出处
《地质与资源》
CAS
2020年第5期411-418,共8页
Geology and Resources
基金
辽宁省地质矿产勘查局项目“辽宁变质核杂岩及控矿规律研究”(辽地矿2016-01).
关键词
辽东半岛
早白垩世
变质核杂岩
拆离断层
动力学特征
华北克拉通
Liaodong Peninsula
Early Cretaceous
metamorphic core complex
detachment fault
dynamics
North China Craton
