四川理塘脚根玛锡锌矿床成因与成矿模式  

Genesis and Metallogenetic Model of the Jiaogenma Sn-Zn Deposit in Litang,Sichuan

作　　者：曾毅夫 梁鹏飞 徐勇 谢伟 曾杰 袁宵 杨魁 赵久军 ZENG Yi-fu;LIANG Peng-fei;XU Yong;XIE Wei;ZENG Jie;YUAN Xiao;YANG Kui;ZHAO Jiu-jun(Geophysical Exploration Team,SBGEEMR,Chengdu610071)

机构地区：[1]四川省地质矿产勘查开发局物探队,成都610071

出　　处：《四川地质学报》2021年第4期604-608,共5页Acta Geologica Sichuan

摘　　要：脚根玛锡锌矿床位于昌多阔-格聂Sn-Ag-Pb-Zn-Cu构造岩浆成矿带,燕山晚期绒依措黑云母二长花岗岩体北东缘,矿体赋存于中三叠世列衣组组变质砂岩夹板岩的北北西向构造破碎带中,初步圈定锡锌多金属矿带6条,脉状、透镜状锡锌矿体20个。自岩体方向由内向外,围岩蚀变由近外接触带的角岩化、矽卡岩化过渡为远外接触带的硅化、碳酸盐化、绢云母化、绿泥石化;主成矿元素出现Sn→SnZn→PbZnAg组合分带趋势。矿床形成大致可划分为矽卡岩成矿期、石英硫化物成矿期和表生期,矿物生成顺序为:锡石→黄铁矿-磁黄铁矿→(铁)闪锌矿→方铅矿→黄铜矿。矿床成因为岩浆热液型。The Jiaogenma Sn-Zn deposit lies on the northeastern margin of the Late Yanshanian Rongyi Co biotite monzogranite in the Changduokuo-Genie Sn-Ag-Pb-Zn-Cu tectonomagmatic metallogenic belt.6 Sn-Zn-polymetallic ore zones consisting of 20 veined and lenticular Sn-Zn orebodies are delineated.Hornfelsization,skarnization,silicification,carbonatization,sericitization and chloritization are developed from the intrusive to the surrounding rock.Zoning of major ore-forming element associations is Sn→Sn-Zn→Pb-Zn-Ag.The ore-formation may be divided into skarn mineralization stage,quartz-sulfide mineralization stage and supergene mineralization stage.The mineralogenic sequence is cassiterite→pyrite→pyrrhotite→marmatite→galena→chalcopyrite.The deposit is magmatic hydrothermal one.

关 键 词：锡锌矿 岩浆热液型 成矿模式 四川理塘脚根玛 

分 类 号：P612[天文地球—矿床学]