【引用本文】 戴婕, 徐金沙, 杜谷, 等. 利用扫描电镜-电子探针研究四川杨柳坪镍铜硫化物矿床铂钯的赋存状态及沉淀机制[J]. 岩矿测试, 2015, 34(2): 161-168. doi: 10.15898/j.cnki.11-2131/td.2015.02.002
DAI Jie, XU Jin-sha, DU Gu, et al. Analysis of the Occurrence of Platinum-Palladium and Precipitation Mechanism by SEM and EPMA in the Ni-Cu Sulphide Deposits from Yangliupin, Sichuan Province, China[J]. Rock and Mineral Analysis, 2015, 34(2): 161-168. doi: 10.15898/j.cnki.11-2131/td.2015.02.002

利用扫描电镜-电子探针研究四川杨柳坪镍铜硫化物矿床铂钯的赋存状态及沉淀机制

1. 

成都理工大学, 四川 成都 610059

2. 

中国地质调查局成都地质调查中心, 四川 成都 610081

3. 

国土资源部沉积盆地与岩相古地理重点实验室, 四川 成都 610081

收稿日期: 2014-05-14  修回日期: 2014-12-28  接受日期: 2015-01-08

基金项目: 铂族元素赋存状态的系统分析与研究方法(1212011120273);西藏大型矿床成矿专属性研究(1212011221073)

作者简介: 戴婕, 博士研究生, 从事微区分析、矿物学、矿床地球化学及实验地球化学研究.E-mail:daijiegirl@163.com。

Analysis of the Occurrence of Platinum-Palladium and Precipitation Mechanism by SEM and EPMA in the Ni-Cu Sulphide Deposits from Yangliupin, Sichuan Province, China

1. 

Chengdu University of Technology, Chengdu 610059, China

2. 

Chengdu Geological Survey Center, China Geological Survey, Chengdu 610081, China

3. 

Key Laboratory of Sedimentary Basin and Paleogeography & Lithofacies, Chengdu 610081, China

Received Date: 2014-05-14
Revised Date: 2014-12-28
Accepted Date: 2015-01-08

摘要:本文利用电子探针和配备能谱分析功能的扫描电镜对四川杨柳坪镍-铜硫化物矿床中铂钯的赋存状态进行了研究。结果表明, 铂以独立矿物相砷铂矿和自然铂存在; 钯以碲化物、碲铋化物、碲锑化物、锑化物及自然钯独立矿物相存在, 也以类质同象形式分布在碲镍矿中(钯含量约10%), 另外还以锑铋钯碲矿、六方锑碲钯矿、碲钯矿独立矿物相存, 并以类质同象形式分布在Vavrinite(钯含量5%)和砷铂矿(钯含量1%~5%)中。杨柳坪矿床中铂钯元素沉淀与贱金属矿物(BMS)及晚期热液蚀变矿物蛇纹石、方解石密切相关, 其沉淀经历了3个阶段:① 早期高温阶段(1200~900℃), 铂钯元素沉淀并包裹在BMS中; ② 中期中高温阶段(650~250℃), 分离结晶作用使铂钯元素沉淀并分布BMS矿物的边部, 同时该阶段热液来源的铂钯元素沉淀于BMS粒间; ③ 晚期热液蚀变阶段(500~300℃), 热液蚀变作用引起铂钯元素沉淀在蚀变矿物中或嵌布在BMS裂隙。本文研究成果为认识该矿床及同类型镍-铜硫化物矿床的铂钯成矿过程提供了新的依据。

关键词: 扫描电镜, 电子探针, 杨柳坪, 镍-铜硫化物矿床, , , 赋存状态, 沉淀机制

Analysis of the Occurrence of Platinum-Palladium and Precipitation Mechanism by SEM and EPMA in the Ni-Cu Sulphide Deposits from Yangliupin, Sichuan Province, China

KEY WORDS: Scanning Electron Microscope (SEM), Electron Probe Microscope Analysis (EPMA), Yangliuping Ni-Cu sulfide PGEs deposit, Pt-Pd elements, occurrence, precipitation mechanism,  ,  

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利用扫描电镜-电子探针研究四川杨柳坪镍铜硫化物矿床铂钯的赋存状态及沉淀机制

戴婕, 徐金沙, 杜谷, 王坤阳