云南个旧锡矿的成矿时代  

METALLOGENIC AGES OF GEJIU TIN ORE DEPOSIT IN YUNNAN PROVINCE

作　　者：秦德先[1] 黎应书[1] 谈树成[1] 陈爱兵[1] 薛传东[1] 范柱国[1] 党玉涛 童祥 武俊德 李玉新 王海云 

机构地区：[1]昆明理工大学矿产地质研究所,昆明650093 [2]云南锡业公司,云南个旧661400

出　　处：《地质科学》2006年第1期122-132,共11页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：云南省省院省校科技合作项目"个旧锡矿深部和外围成矿预测及矿山增储研究"(2000YK05);云南锡业集团有限责任公司委托项目"个旧锡矿区和外围玄武岩及其成矿作用研究";国家十五科技攻关项目(2004BA615A03);云南省自然科学基金(2003D0008Q)资助研究。

摘　　要：云南个旧锡矿经历了印支期海底基性火山—沉积成矿、海底喷流—沉积成矿和燕山晚期的花岗岩叠加改造成矿的作用。用ArAr、KAr和PbPb法分析了3个成矿系列的成矿年龄,结果表明,成矿系列Ⅰ的ArAr法坪年龄和等时线年龄为95.93±5.41～123.91±15.41Ma,KAr法表观年龄为112.50±2.25Ma,普通铅法年龄为210～240Ma;成矿系列Ⅱ的ArAr法坪年龄和等时线年龄为191.81±2.26～205.11±4.38Ma,KAr法表观年龄为186.01±3.72Ma,普通铅法年龄为200～230Ma;成矿系列Ⅲ的ArAr法坪年龄和等时线年龄为83.23±2.07～85.22±2.38Ma,KAr法表观年龄为43.49±0.87Ma,普通铅法年龄为83～116Ma。The formation of the Gejiu tin ore deposits experienced three generation mineralizations, which were, in an ascending order, the seabed basic volcano-sedimentary mineralization in the Indosinian epoch （metallogenetic series Ⅰ ）, the seabed exhalative hydrothermal sedimentary mineralization in the Indosinian epoch （metallogenetic series Ⅱ ） and the superimposed granitism-reformed mineralization in the Yanshanian epoch （ metallogenetic series Ⅲ ）. The paper analyzed metallogenetic ages of the above-mentioned metallogenetic series by means of Ar-Ar, K-Ar and Pb-Pb methods. The dating results showed that the ages of metallogenetic series Ⅰ by Ar-Ar, K-Ar and Pb-Pb methods yielded from 95.93 ±5.41 to 123.91 ± 15.41 Ma, 112. 50 ±2.25 Ma and from 210 to 240 Ma respectively. The ages of metallogenetic series Ⅱ yielded from 191.81 ± 2.26 to 205.11 ± 4.38 Ma, 186.01 ± 3.72 Ma and from 200 to 230 Ma respectively. The ages of metallogenetic series Ⅲ yielded from 83.23 ± 2.07 to 85.22 ± 2.38 Ma, 43.49 ±0.87 Ma and from 83 to 116 Ma respectively. In other words, the Gejiu tin ore deposit should be a mine with multiple phases of mineralization.

关 键 词：成矿时代 多期成矿 个旧锡矿 云南 

分 类 号：P534[天文地球—古生物学与地层学]