铜陵矿集区成矿流体系统时限的初步厘定  

Tentative Temporal Constraints of Ore-forming Fluid Systems in Tongling Metallogenic Province

作　　者：蒙义峰[1] 杨竹森[1] 曾普胜[1] 徐文艺[1] 王训成[2] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]安徽省地勘局三二一地质队,安徽铜陵244033

出　　处：《矿床地质》2004年第3期271-280,共10页Mineral Deposits

基　　金：国土资源部科技司专项研究计划 (B0 0 0 2_3 );国家地质调查局地质调查项目 (2 0 0 110 0 0 0 0 0 4)的联合资助

摘　　要：文章在铜陵矿集区成矿流体系统划分的基础上 ,对其中的部分流体系统的流体记录采集了 13件样品 ,分别用Re_Os法 (辉钼矿、黄铁矿 )、Ar_Ar和K_Ar法 (铬云母、闪长岩等 )进行了同位素年龄精确测定 ,结合野外对不同流体记录的产出层位、切割交叉关系的研究 ,厘定了铜陵矿集区 4套流体系统的时限。初步界定了矿集区部分流体系统的时间界限 ,为流体系统的划分和成矿流体的研究提供了重要的基础。Based on division of fluid systems in Tongling metallogenic province, the authors collected thirteen samples from various fluid systems. Molybdenite,pyrite,sericite and diorite were precisely determined by Re_Os,Ar_Ar and K_Ar isotopic dating methods. These data, combined with the host strata and the cross_cutting relationship of fluid records, led the authors to determine the time limits of four fluid systems in Tongling ore concentration area: Yanshanian low_to_moderate temperature (epithermal) fluid system〔(118.36±1.96) Ma〕, Yanshanian volcanic fluid system(Early Cretaceous), Yanshanian magmatic fluid system(Late Jurassic_Early Cretaceous 〔(144.93 ±0.44)～(133.59±0.55) Ma〕 and Hercynian eruptive sedimentary fluid system〔early stage of Late Carboniferous (303±33) Ma～late stage of Late Permian〕. On such a basis, the tentative temporal constraints of fluid systems in Tongling metallogenic province are established, and hence an important basis for fluid system division and metallogenic fluid study is provided.

关 键 词：地质学 流体系统 时限 初步厘定 铜陵矿集区 

分 类 号：P597.3[天文地球—地球化学]