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滇西北雪鸡坪斑岩铜矿S,Pb同位素组成及对成矿物质来源的示踪
冷成彪; 张兴春; 王守旭; 王外全; 秦朝建; 吴孔文; 任涛
Corresponding Author张兴春
2008
Source Publication矿物岩石
Issue4Pages:80-88
metadata_24其它
Abstract雪鸡坪斑岩铜矿位于西南三江构造火成岩带义敦岛孤带,其成矿斑岩为印支期石英闪长玢岩和石英二长宽岩。研究对该矿区安山岩、矿化斑岩和矿石矿物系统进行S,Pb同位素分析结果表明:金属硫化物的δ34S值为-3.1‰~+0.7‰,平均值为-1.1‰,与矿化斑岩的硫同位素组成(-1.4‰和-1.5‰)一致,均落入幔源硫范围,表明硫主要来自岩浆;δ34S黄铁矿(-1.8‰~+0.7‰,平均0.5‰)〉δ34S黄铜矿(-2.2‰~0.0‰,平均-1.2‰)〉δ34S方铅矿(-3.1‰~1.3‰,平均-2.4‰),硫同位素分馏基本达到平衡。矿石矿物(208Pb/204Pb=37.917~38.230,平均值38.075;207Pb/204Pb-15.528~15.614,平均值15.571;206Pb/204Pb=17.929~18.082,平均值17.981)与矿化斑岩(208Pb/204Pb=37.832、37.883,207Pb/204Pb=15.529、15.538,206Pb/204Pb=17.906、17.910)以及安山岩(208Pb/204Pb=37.816~37.884,207Pb/204Pb-15.549~15.562,206Pb/204Pb=17.845~17.919)的初始铅组成基本一致,变化范围较小,表明三者具有相同的来源;在铅构造模式图上,所有样品铅同位素均位于造山带演化线上或附近,在铅同位素源区判别图中,均落入造山带和下地壳区域,这表明Pb主要来源于壳幔混合。雪鸡坪铜矿S,Pb同位素组成共同指示成矿物质主要来自于深部岩浆,这种岩浆可能主要起源于俯冲洋壳板片的部分熔融并受到少量地壳物质的混染。
KeywordS同位素
Subject Area中国典型特殊区带大规模成矿作用及其动力学
Funding Organization国家自然科学基金(编号为40372049和40873039)
Indexed ByCSCD
Language中文
CSCD IDCSCD:3448311
Citation statistics
Cited Times:21[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/306
Collection矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
Corresponding Author张兴春
Recommended Citation
GB/T 7714
冷成彪,张兴春,王守旭,等. 滇西北雪鸡坪斑岩铜矿S,Pb同位素组成及对成矿物质来源的示踪[J]. 矿物岩石,2008(4):80-88.
APA 冷成彪.,张兴春.,王守旭.,王外全.,秦朝建.,...&任涛.(2008).滇西北雪鸡坪斑岩铜矿S,Pb同位素组成及对成矿物质来源的示踪.矿物岩石(4),80-88.
MLA 冷成彪,et al."滇西北雪鸡坪斑岩铜矿S,Pb同位素组成及对成矿物质来源的示踪".矿物岩石 .4(2008):80-88.
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