云南白马寨铜镍硫化物矿床Re-Os同位素定年及其地质意义

石贵勇 孙晓明 王生伟 熊德信 屈文俊 杜安道. 云南白马寨铜镍硫化物矿床Re-Os同位素定年及其地质意义[J]. 岩石学报, 2006, 22(10): 2451-2456.
引用本文: 石贵勇 孙晓明 王生伟 熊德信 屈文俊 杜安道. 云南白马寨铜镍硫化物矿床Re-Os同位素定年及其地质意义[J]. 岩石学报, 2006, 22(10): 2451-2456.
Re-Os isotopic dating and its geological implication of Baimazhai Cu-Ni sulphide deposit, Yunnan province, China.[J]. Acta Petrologica Sinica, 2006, 22(10): 2451-2456.
Citation: Re-Os isotopic dating and its geological implication of Baimazhai Cu-Ni sulphide deposit, Yunnan province, China.[J]. Acta Petrologica Sinica, 2006, 22(10): 2451-2456.

云南白马寨铜镍硫化物矿床Re-Os同位素定年及其地质意义

  • 基金项目:

    本研究得到国家重点基础研究发展规划(973)项目(No.2002CB412610)、国家自然科学基金(编号:40173025)、国家教育部跨世纪优秀人才培养计划基金和南京大学成矿作用国家重点实验室开放基金的资助. 致谢野外工作中,白马寨铜镍矿山领导及技术科李春保工程师给予了大力支持和热情协助,并提供了宝贵资料,在此特表谢忱!

Re-Os isotopic dating and its geological implication of Baimazhai Cu-Ni sulphide deposit, Yunnan province, China.

  • 采用Carius管溶矿、蒸馏法分离Os、丙酮萃取Re和电感耦合等离子体质谱(ICP-MS)联合测定法,对云南白马寨岩浆岩型铜镍硫化物矿硫化物矿石进行了Re-Os同位素精确定年,得出其等时线年龄为259±18Ma(MSWD=0.028),187Os/188Os初始值为0.455±0.024,相当于γ(Os(t)为+263.硫化物矿石Re/Os比值为11.56~21.04.研究结果显示,白马寨铜镍硫化物矿床成矿时代与峨眉大火山岩省主喷发期基本同时,其物质来源属壳-幔混合来源,壳源Os的加入量约为30%左右.
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收稿日期:  2006-08-01
修回日期:  2006-08-15
刊出日期:  2006-10-31

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