扬子地台周缘铅锌矿成矿特征及成矿规律  

Metallogenic Characteristic and Regularity of Lead-zinc Deposits around Yangtze Platform

作　　者：陈超[1,2] 曹晓峰[1,2] 王玉奇[1,2] 李鹏[1] 

机构地区：[1]中国地质大学(武汉)资源学院,湖北武汉430074 [2]中国地质大学(武汉)地质过程与矿产资源国家重点实验室,湖北武汉430074

出　　处：《资源环境与工程》2010年第4期333-340,共8页Resources Environment & Engineering

摘　　要：扬子地台周缘是中国重要的金属矿产成矿区。受不同时期大地构造演化的影响及不同地层建造的控制,其周缘形成了一系列成矿时代、赋矿层位、形成机制各异的铅锌矿床,但亦表现出一定的规律性。在对扬子地台周缘各铅锌矿化集中区成矿特征进行简要总结的基础上,结合前人研究,对扬子地台周缘铅锌矿成矿规律进行了初步的总结,认为扬子地台周缘铅锌矿受地层、构造、岩浆岩等多因素控制,成矿类型包括沉积型、MVT型、SEDEX型、VMS型等;赋矿层位从晚元古界延续至晚古生界,地台周缘盖层碳酸盐岩为主要的赋矿层位;从含矿层位的垂向分布来看,各矿化集中区含矿地层有自地台边缘由外向内逐渐变新的趋势,这可能与局部边缘地壳抬升及大洋海盆向古扬子地台内收缩有关;成矿时代从晚震旦世持续至中侏罗世,显示了扬子地台周缘复杂的构造演化事件对成矿的响应,印支—燕山期的构造岩浆活动对铅锌矿化的影响应引起重视。The margin of yangtze platform is a significant metallogenic area in China,where series of lead-zinc deposit formed with different metallogenic epoch,ore bearing stratum and formation mechanism controlled by the geotectonic evolution in various periods and different stratigraphic formation,however,revealing some regularitis.In this paper,we briefly summarize the metallogenic characteristics of lead-zinc mineralization concentration area and then primarily discuss the metallogenic regularity of lead-zinc deposit around Yangtze Platform.These deposits are controlled by stratums,structures,magmatites.etc in the area,including sedimentary,MVT,SEDEX,VMS metallogenic types and so on.The ore-bearing strata extend from late proterozoic to late paleozoic and the carbonate is the main ore-bearing strata.The age of ore-bearing stratas in different metallogenic area gradually become new from outside to inside edge of the platform,this may be related to local crustal uplift and the ocean basin＇s shrink along yangtze platform.The metallogenic epoch continued from late sinian to middle Jurassic,revealing the metallogenic response of complex tectonic evolution at the margin of yangtze platform.In additional,the effect of ectonic-magmatic activities to the lead-zinc mineralization in Indo-Yanshan period should cause the attention.

关 键 词：扬子地台 铅锌矿床 成矿特征 成矿规律 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]