南京大学学报（自然科学版）Issue(2)：181-191,11.DOI:10.13232/j.cnki.jnju.2014.02.010
南京大平山铜矿砷的赋存状态及矿石S、Pb同位素
Mode of occurrence of arsenic and S,Pb isotope in the Dapingshan copper deposit,Nanj ing
摘要
Abstract
The detection of Arsenic,under the microscope,appeared chiefly in the form of sulphide from the Dapingshan Copper deposit using electron microprobe analysis,with the appearance of arsenopyrite and a small amount of tennatite independently distributed in the ore.Arsenopyrites are mainly found in the form of automorphic-hypidiomorphic granular texture and xenomorphic granular texture.Its mode of occurrence are as follows:firstly,it acts as an independent sparsity disseminated mineral with partial strip and medium dense dissemination distributed in ore;secondly,it replaces the paragenic chalcopyrite and pyrite in ore after their formation;finally,small amounts of arsenopyrites are often wrapped with late crystal form of chalcopyrite and pyrite.The content of tennantite in ore is modest,and the paragenesis of xenomorphic granular texture with chalcopyrite,pyrite and arsenopyrite often leads to the replacement of chalcopyrite and pyrite.The current Sulfur isotope analysis revealed the derivation of arsenic from the late-magmatic hydrothermal or the late-volcanic hydrothermal fluids,whereas the Lead isotope analysis indicated the derivation of arsenic from the upper earth crust.关键词
砷/赋存状态/同位素/大平山铜矿/江苏南京Key words
Arsenic/mode of occurrence/isotope/Dapingshan copper deposit/Nanjing city/Jiangsu Province引用本文复制引用
王少华,徐兆文,陆现彩,王汝成,王浩,陈锰,朱翔宇..南京大平山铜矿砷的赋存状态及矿石S、Pb同位素[J].南京大学学报（自然科学版）,2014,(2):181-191,11.基金项目
江苏省国土资源厅资源补偿项目“大平山铜矿砷赋存状态研究”,国家自然科学基金(40973030)项目 （40973030）
