| 伏明珠,凌亚军,李俊.四川盐边高家村岩体地质特征及铂族元素地球化学特征[J].地质找矿论丛,2025,40(1):9-17 |
| 四川盐边高家村岩体地质特征及铂族元素地球化学特征 |
| Geological and PGE geochemical characteristics of Gaojiacun complex in Yanbian county, Sichuan province |
| 投稿时间：2024-10-22 修订日期：2025-01-10 |
| DOI：10.6053/j.issn.1001-1412.2025.01.002 |
| 中文关键词: 高家村杂岩体 铂族元素 地球化学特征 盐边 |
| 英文关键词:Gaojiacun complex PGE geochemical characteristics Yanbian county |
| 基金项目:四川省地质局专项项目"四川省盐边县冷水箐地区镍矿靶区优选"(编号:SCDZ-DZKC202404)资助。 |
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| 中文摘要: |
| 高家村杂岩体位于川滇SN向构造带与南岭EW向构造带的西延复合部位,赋矿岩体为橄榄岩,矿石类型为硫化铜镍型。通过对高家村岩体铂族元素特征研究,结果显示:岩体w(Ni)/w(Cu)=0.37~51.4,w(Pd)/w(Ir)=2.18~51.31,w(Pt+Pd)/w(Os+Ir+Ru)=1.86~10.03,w(Pt)/w(Pt+Pd)=0.02~0.73,说明高家村岩体原始岩浆为高镁玄武质岩浆。高家村岩体w(Ir)=0.005×10-9~1.44×10-9,w(Pd)/w(Ir)=2.18~51.31,平均为15.62,高于原始地幔值;w(Ni)/w(Cu)=0.37~51.4,平均为10.22,说明高家村岩体部分熔融程度较低。高家村岩体w(Cu)/w(Pd)=3.03~622.98,平均为59.66,平均值大于原始地幔w(Cu)/w(Pd)值,推测高家村岩体经历过深部的硫化物熔离,之后剩余岩浆继续上升到浅部形成现在的高家村岩体。 |
| 英文摘要: |
| Gaojiacun complex is located at section where the NS Chuan (Sichuan province)-Dian (Yunnan province) structural belt and westward extension of EW Nanling structural belt are compounded. Peridotite is the ore-hosted rock. The ore is Cu-Ni-sulfide type. Geochemistry of the complex is that w(Ni)/w(Cu)=0.37~51.4, w(Pd)/w(Ir)=2.18~51.31, w(Pt+pd)/w(Os+Ir+Ru)=1.86~10.03, w(Pt)/w(Pt+Pd)=0.02~0.73 and indicates that the magma is orignaly high magnisium basaltic magma. w(Ir) value of the complex is 0.005×10-9~1.44×10-9, w(Pd)/w(Ir)=2.18~51.31(averagely 15.12) higher than that primitive mantle, w(Ni)/w(Cu)=0.37~51.4 (averagely 10.22) indicate poor patial melting of the complex. w(Cu)/w(Pd)=3.03~622.98 (averagely 59.66), higher than w(Cu)/w(Pd) of the pritive mantle suggesting deep sulfide melting partition of the magma then the remainder magma upward to be the complex. |
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