本文關(guān)鍵詞： 銀礦床 S-Pb-C-O同位素 硫化物 方解石 東昆侖　出處：《礦物學報》2017年06期 　論文類型：期刊論文

【摘要】：那更康切爾銀礦床位于東昆侖成礦帶中部,緊鄰昆中構(gòu)造帶。礦體主要以脈狀產(chǎn)出于古元古代金水口群片麻巖以及晚古生代花崗閃長巖和二長花崗巖中。本文在礦床地質(zhì)特征研究基礎(chǔ)上,采集12件樣品對其硫化物(黃鐵礦、方鉛礦、閃鋅礦)和方解石分別開展了S-Pb和C-O同位素研究。結(jié)果表明,礦床硫同位素組成穩(wěn)定,δ~(34)S主要集中于-3.4‰~0.6‰之間,主要來源于巖漿作用;硫化物~(206)Pb/~(204)Pb值介于18.28~18.62,平均值為18.37,~(207)Pb/~(204)Pb值介于15.60~15.73,平均值為15.65,~(208)Pb/~(204)Pb值介于38.38~39.10,平均值為38.63,鉛同位素組成穩(wěn)定,礦石鉛主要來源于地殼;方解石δ~(13)C值介于-6.0‰~-2.8‰,平均值為-4.25‰,δ~(18)O值介于6.1‰~20.5‰,平均值為12.49‰,表明C可能主要由巖漿作用提供。綜合礦床地質(zhì)特征和區(qū)域成礦背景認為該礦床應屬于巖漿期后熱液礦床,受構(gòu)造和巖漿作用的雙重控制。
[Abstract]:The Nagan Kangchell silver deposit is located in the middle of the East Kunlun metallogenic belt. The orebody mainly occurs in the ancient gold mouth group gneiss of Gu Yuan and in the late Paleozoic granodiorite and monzomorphic granite. Based on the study of geological characteristics of the deposit, the orebody is located in the middle Kun tectonic belt. S-Pb and C-O isotopic studies on sulphide (pyrite, galena, sphalerite) and calcite were carried out in 12 samples. The results show that the sulfur isotopic composition of the deposit is stable, and 未 ~ (34) ~ (34) S is mainly concentrated in the range of -3.4 鈥，

本文編號：1552971