长江中下游成矿带深部找矿思路探讨  

DISCUSSION ON DEEP ORE PROSPECTING IN THE MIDDLE AND LOWER REACHES OF YANGTZE RIVER MINERALIZATION BELT

作　　者：真允庆 丁梅花[1,2] 戴宝章[4] 袁杰[1,2] 花林宝[1,4,5] 李忠华[1,2,4] 赵理芳[1,2] 郝红蕾[1,2] 陈国衡 

机构地区：[1]江苏省有色金属华东地质勘查局,南京210093 [2]江苏省有色金属华东地质勘查局814队,江苏镇江212005 [3]中国冶金地质勘查工程局三局,太原030002 [4]南京大学地球科学系,南京210093 [5]江苏华东有色矿业发展有限公司,南京210007

出　　处：《地质找矿论丛》2009年第3期179-188,共10页Contributions to Geology and Mineral Resources Research

基　　金：江苏省自然科学基金项目"长江中下游地区铁;铜;硫;金矿床成矿规律与成矿预测研究"(项目编号:BK2008026)资助

摘　　要：长江中下游成矿带的探明资源已开采殆尽,深部找矿(-500^-2000 m)应是当务之急。根据勘查与开采资料的综合研究,该区的控矿条件可概括为:岩石圈减薄事件是成矿作用的重要前提,燕山期强烈的构造-岩浆活动是区域成矿的主要关键,地表断裂构造样式是深部构造的响应,前陆盆地沉积建造是成矿作用的优越围岩条件,铁、铜矿床的岩浆岩蚀变特点明显不同,埃达克质岩可视为找铜矿床的间接标志。对于今后深部找矿提出4个思路:①火山岩盆地下部的深部找矿思路;②目标地层的深部找矿思路;③复合类型矿床的深部找矿思路;④接触带"多台阶"的深部找矿思路。The proven mineral resources above elevation of -500--2000m at the ore belt of middle and lower Yangtze river have almost been exhausted and is urgent the ore prospecting to depth in the belt. Comprehensive study on geological exploration and mining for more than latest half century shows that the ore control factors are as follows： lithosphere thinning that is the prerequisite of mineralization; strong Yanshanian （J3-K2-3） tectonic-magmatic activities that are the key to regional mineralization; surfacial fractural pattern that is expression of the deep structural activity; sedimentary formations in foreland basin that is favorable host rocks of ore deposit; various wall rock alteration patterns of Fe, Cu ore deposits of which adakite is the indirect mark for Cu ore prospecting. Four philosophical ideas for further prospecting target depth are pointed out： （1） to depth beneath of volcanic basins, （2） to depth of the target strata, （3） to depth of the complex ore deposits, （4） to depth of the multi-stepped contact zones.

关 键 词：燕山期构造-岩浆活动 铁 铜夕卡岩-斑岩型矿床 深部找矿 长江中下游成矿带 

分 类 号：P612[天文地球—矿床学] P618.4[天文地球—地质学]