福建省顺昌县山后铅锌矿床地质特征及找矿标志  

Geological Characteristics and Prospecting Indicators of the Shanhou Lead-zinc Deposit in Shunchang County,Fujian Province

作　　者：刘乃忠[1,2] 

机构地区：[1]中国地质大学(武汉),湖北武汉430074 [2]福建省地质调查研究院,福建福州350001

出　　处：《地质与勘探》2012年第3期570-579,共10页Geology and Exploration

基　　金：中国地质调查局大调查项目"福建建瓯八外洋-南平后坪铅锌矿评价"项目(200110200033)资助

摘　　要：山后铅锌矿床位于福建省顺昌县高阳乡境内,目前已发现12个铅锌矿体和3个低品位矿体,矿体呈层状、似层状、透镜状产于F13、F14断裂之间的东岩组透辉(透闪)石岩中,铅+锌品位7.21×10-2,求得铅+锌(332)+(333)金属量12.46万吨,矿床达中型规模。通过对山后铅锌矿的地层、构造、岩体以及围岩蚀变等地质特征分析,认为铅锌矿体受东岩组绿片岩层位控制,并受热液叠加改造,属海底火山喷发-沉积变质(热液改造)块状硫化物型矿床;总结出中-晚元古代东岩组绿片岩层、地表矿体氧化后常见有黑色的褐铁矿斑点、围岩常伴有绿泥石化、绿帘石化、黄铁矿化、硅化等蚀变以及物化探异常等找矿标志,其对省内乃至华南地区寻找同类型矿床具重要意义。The Shanhou lead-zinc deposit is located in Gaoyang Township of Shunchang County, Fujian Province. It occurs in green schist of the Dongyan Fomaation. Presently, 12 Pb-Zn orebodies and 3 low-grade Pb-Zn ore-bodies have been found there. The ore-bodies occur as stratified or stra- told beds and lentieular type in diopside or tremollte of the Dongyan Formation between faults FI3 and FI4. The grade of Pb plus Zn is 7.21% , and the amount of 332 and 333 reserve is 124.6 thousand tons, reaching the medium-sized deposit. The study indicates that the lead-zinc deposit is controlled by greensehist association of the Dongyan Formation, subjected to superimposed reformation of hydrothen＇nal solution. It belongs to submarine volcano - sedimenta17 metamorphic （hydrothermal modification） massive sulfide deposit. And we summarize the prospecting indicators, including the greenschist association of the middle-late Proterozoie Dongyan Formation, henomenon of black limonite spots that are often seen after oxidation of ground orebodies, chloritization, epidotization, pyritized and silieification alteration of Surrounding rock, and geophysical and geochemical anomalies by the studies of the stratum, structure, rock mass and surrounding rock alteration on the Shanhou deposit. This study may have guiding significance for the similar deposits in Fujian Province and South China.

关 键 词：铅锌矿床 地质特征 矿床成因 找矿标志 

分 类 号：P614[天文地球—矿床学] P611.3[天文地球—地质学]