内蒙古黄岗梁铁锡矿床闪锌矿LA-ICP-MS微量元素组成及其指示意义

发布时间：2018-02-21 08:33

本文关键词： 闪锌矿微量元素 LA-ICP-MS 黄岗梁铁锡矿床　出处：《岩石矿物学杂志》2017年03期 　论文类型：期刊论文

【摘要】：黄岗梁铁锡矿床位于大兴安岭中南段晚古生代增生造山带。矿区内闪锌矿产于矽卡岩中,可分为浸染状和层纹状闪锌矿。本文对两种闪锌矿进行了高精度LA-ICP-MS元素含量测试,结果表明矿区两种闪锌矿具有相同成因特征,闪锌矿中Mn、Cu、As、In较富集,Ga、Ge、Cd含量较低,而As、Sn、Bi、Pb含量变化较大。Cu、Sn、Bi、Pb等元素在闪锌矿中以独立矿物赋存,Mn、Fe、Ga、Ge、Cd、In、Sb以类质同像形式赋存在闪锌矿晶格中。In/Ga、In/Ge比值较低,Zn/Cd比值为233~250,指示闪锌矿形成于中高温环境。Cd/Fe、Cd/Mn比值分别小于0.1和0.5,指示闪锌矿成因与岩浆活动有关,In Ge特征图解也指示其矽卡岩成因。通过与国内外典型矿床闪锌矿微量元素特征对比,结合矿床地质特征认为黄岗梁铁锡矿床中闪锌矿属于与燕山期岩浆作用有关的中高温矽卡型闪锌矿。
[Abstract]:The Huanggangliang iron tin deposit is located in the late Paleozoic accretionary orogenic belt in the central and southern part of Daxinganling. The sphalerite occurs in skarn and can be divided into disseminated and laminated sphalerite. In this paper, the content of LA-ICP-MS elements in two kinds of sphalerite has been measured with high precision. The results show that the two kinds of sphalerite have the same genetic characteristics, and the content of mn, Cu, Asn and CD in sphalerite is relatively low. However, the content of aspergite in the sphalerite varies greatly. The content of the elements, such as Cu, SnC, Bi, Pb and so on, are deposited in sphalerite as independent minerals in the form of homograph. The ratio of. In- / GaGe / Ge is lower than that of ZnR. 250, indicating that the sphalerite is formed in a medium high temperature environment. CdFe- / mn / mn ratio is smaller, respectively, in the sphalerite lattice in the form of isomorphism. The results show that the Zn / CD / CD / CD / CD / CD ratio is lower than that in the sphalerite crystal lattice. At 0. 1 and 0. 5, the characteristic diagrams indicating that the sphalerite genesis is related to magmatic activity, and the skarn genesis of the sphalerite are also indicated. The trace element characteristics of sphalerite are compared with those of typical ore deposits at home and abroad. According to the geological characteristics of the deposit, the sphalerite in the Huanggangliang iron and tin deposit belongs to the middle and high temperature skarn sphalerite related to the Yanshanian magmatism.
【作者单位】：中南大学有色金属成矿预测与地质环境监测教育部重点实验室;中南大学地球科学与信息物理学院;有色金属矿产地质调查中心;内蒙古黄岗矿业有限责任公司;
【基金】：中南大学中央高校基本科研业务费专项资金资助(2016zzts442)~~
【分类号】：P618.31;P618.4

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