本文選題：地球化學(xué)　切入點：同位素組成　出處：《礦床地質(zhì)》2016年05期

【摘要】：文章通過研究滇東北火德紅鉛鋅礦床巖石地球化學(xué)和S、Pb同位素地球化學(xué)特征,分析其成礦金屬和成礦流體來源,進(jìn)而對其成礦機制進(jìn)行探討。圍巖主量與微量元素分析結(jié)果表明,火德紅鉛鋅礦床為后生熱液礦床,鉛鋅等成礦金屬物質(zhì)隨熱液進(jìn)入賦礦圍巖,結(jié)合圍巖蝕變特征判斷,其應(yīng)屬中_低溫?zé)嵋撼梢?閃鋅礦與黃鐵礦的δ34S主要分布在-17‰~-11.4‰,其S源極可能來自生物成因硫酸鹽還原,與川滇黔地區(qū)鉛鋅礦的S同位素來源(總體來自海水硫酸鹽熱化學(xué)還原)有著明顯的不同;礦石硫化物的Pb同位素比值變化范圍較窄,均為正常Pb;Pb同位素主要來自于上地殼,有少量巖漿物質(zhì)混入。上述特征表明火德紅鉛鋅礦床為構(gòu)造和巖性共同控制的后生熱液型礦床,其成礦機制與典型MVT型鉛鋅礦相似。
[Abstract]:Based on the study of the geochemistry of rocks and the isotopic geochemical characteristics of Sch Pb in the Huode Red Pb-Zn deposit in northeastern Yunnan, the source of metallogenic metals and ore-forming fluids is analyzed in this paper. The main amount of surrounding rock and trace element analysis results show that the Huode red lead-zinc deposit is a epigenetic hydrothermal deposit, and the ore-forming metal materials such as lead and zinc enter the ore-bearing surrounding rock with hydrothermal solution, and judge the alteration characteristics of surrounding rock. The 未 34s of sphalerite and pyrite are mainly distributed in -17 鈥，

本文編號：1665104