云南香格里拉麻花坪钨铍矿床地球化学特征及其成因意义  

Geochemistry and its Genesis Implications of Beryllium and Tungsten Deposit in Mahuaping of Shangri-La,Yunnan

作　　者：冉明佳 钟康惠[2] 杨建功 罗明非[3] 

机构地区：[1]中色地科矿产勘查股份有限公司,北京100012 [2]成都理工大学,四川成都610059 [3]中国地质大学,北京100083

出　　处：《四川有色金属》2015年第2期42-45,70,共5页Sichuan Nonferrous Metals

基　　金：国家科技攻关(962914201203);四川省级重点学科建设基金资助项目(SZD0407)

摘　　要：麻花坪矿床位于扬子地块西缘盐源-丽江陆架裂陷褶皱带,三江口-剑川深断裂东侧,是一个大型的钨铍矿床。自该矿床发现以来,有关其地球化学特征未见有报道,本文通过两件矿石样和两件围岩样的稀土、微量元素、铅同位素地球化学特征分析,认为麻花坪钨铍矿床的物质来源具明显的"多源性"特征,以深源为主,围岩亦提供了矿质;矿石的气-液包体测温显示成矿流体温度为350°-151°,结合流体性质的讨论,认为麻花坪矿床属后成深源为主的混源中高温热液型钨铍矿床。Mahuaping deposit which is located in the western margin of the Yangtze block Yanyuan-Lijiang rift shelf fold belt and the east of Sanjiangkou-Jianchuan deep fault is abundant in beryllium and tungsten. Since the deposit has been discovered, there is no report on the geochemistry. In this paper, based on the study of geochemistry characteristics of two pieces of ore samples and two pieces of wall rock samples in HREE and the isotopes of Lead, the author concludes that the material sources of Mahuaping beryllium and tungsten deposit have obvious characteristic of diversity, however, the dominant sources are very deep. By the way, the wall rocks also provide the material sources. The ore-forming fluid temperature of ore＇s gas-liquid inclusions is 350° to 151° Combining with the discussion of the fluid nature, the author concludes that Mahuaping is a mixed source of deep source-based and a medium to high-temperature hydrothermal tungsten and beryllium deposit.

关 键 词：麻花坪 钨铍矿 地球化学 矿床成因 

分 类 号：P618[天文地球—矿床学]