浅议沂沭断裂系及其邻区金矿成矿作用演化  

A DISCUSSION ON METALIZATIONAL PATTERN OF GOLD ORE IN YISHU FAULT SYSTEM

作　　者：邹为雷[1] 沈远超[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029

出　　处：《地质与勘探》2001年第1期20-26,共7页Geology and Exploration

基　　金：中国科学院创新工程"金矿战略资源接替基地若干靶区预测!(项目编号 :KZCX1-Y -0 3)";中国科学院资源与生态环境研究重大项目"我国金

摘　　要：沂沭断裂系在晚侏罗世—早白垩世早期期间的挤压作用造成了胶东地区钙碱性岩浆的侵入 ,同时形成了相应的金矿化。早白垩世期间沂沭断裂系及其邻区进入拉张应力环境 ,在形成胶莱走滑拉分盆地的过程中 ,于盆地边缘产生层间滑动断层带 ,造成层间滑动角砾岩型金矿的形成。燕山中期板块俯冲运动和地幔上涌等因素引起的区域性拉张作用使沂沭断裂继续向下深切张裂 ,向裂谷性质演化 ,造成沂南、临沂等地区较大规模中性偏碱性次火山岩型小岩体的侵入和火山喷发 ,在火山机构内或围绕次火山岩小岩体形成与中性偏碱性次火山岩有关的次火山岩型金矿化。The Yishu fault system is the mainly active fault in the China East, which pression movement happened in the late Jurassic caused the invasion of the cala-alkaline magma and the relevant gold mineralization in the Jiaodong area. The interstratified glide faults are formed in the margin of the Jiaolai pull apart basin in the condition of extensional stress from the early Cretaceous period, which causes the interstratified glide breccia type gold deposits, for example the Pengjiakuang gold deposit, etc. After that the territorial extensional stress field caused by the plates movement and the mantle upheave etc. makes the Yishu fault system keep on cutting downward tend to form rift valley. The tectonism causes the fairly large-scale invasion of the small neutral-partial alkaline rock-bodies and the gold mineralization in the Linyi area. The tectogenesis and magmatism and the relevant gold mineralization in the Yishu fault system in the Mesozoic period are closely relevant to the coaction of the Eurasia Plate and the Izanagi Plate.

关 键 词：沂沭断裂系 成矿作用 中生代 金矿床 挤压作用 层间滑动断层 

分 类 号：P618.510.1[天文地球—矿床学]