| 大兴安岭南段敖仑花斑岩钼(铜)矿床成矿流体来源与成矿作用:稳定同位素C、H、O、S和放射性Pb同位素约束 |
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| 引用本文： | 马星华,陈斌.大兴安岭南段敖仑花斑岩钼(铜)矿床成矿流体来源与成矿作用:稳定同位素C、H、O、S和放射性Pb同位素约束[J].吉林大学学报(地球科学版),2011,41(6):1770-1783. |
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| 作者姓名： | 马星华 陈斌 |
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| 作者单位： | 北京大学地球与空间科学学院/造山带与地壳演化教育部重点实验室,北京,100871;北京大学地球与空间科学学院/造山带与地壳演化教育部重点实验室,北京 100871;新疆大学地质与勘查工程学院,乌鲁木齐830046 |
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| 基金项目： | 国家自然科学基金项目(40625005,40821002) |
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| 摘 要： | 基于稳定同位素C、H、O、S和放射性Pb同位素的测试和分析,对大兴安岭南段敖仑花斑岩钼(铜)矿床成矿流体的来源进行了示踪,探讨了流体演化与成矿作用过程。新的稳定同位素数据显示:敖仑花矿床成矿热液具有混合来源性质;脉石矿物石英中流体的C、H、O同位素和矿石硫化物的S同位素组成指示成矿络合剂主要来自地幔,同时在热液期经历了地壳流体参与的过程;辉钼矿中放射性成因的Pb同位素组成表明,成矿物质(Mo)主要来自造山带物质,部分来自深部幔源。根据H、O同位素组成变化和已有流体包裹体资料,认为敖仑花矿床早、中阶段两次矿化的成矿机制不同:早阶段金属矿化主要与岩浆水和大气降水的流体混合有关,而中阶段大规模成矿作用主要是由流体沸腾所致。综合区域地质演化认为:敖仑花矿床是大兴安岭南段在晚侏罗世—早白垩世时期演化为弧后伸展背景、陆内造山带物质重新活化、壳幔岩浆-热液相互作用的产物,同时暗示壳幔作用强烈的地区利于内生金属矿床成矿。
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| 关 键 词： | 同位素示踪 流体演化 成矿机制 敖仑花矿床 大兴安岭南段 |
The Source of Hydrothermal Fluids and Mineralization in the Aolunhua Porphyry Mo-Cu Deposit,Southern Da Hinggan Mountains:Constraints from Stable(C,H,O and S) and Radiogenic(Pb) Isotopes |
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| MA Xing-hua,CHEN Bin.The Source of Hydrothermal Fluids and Mineralization in the Aolunhua Porphyry Mo-Cu Deposit,Southern Da Hinggan Mountains:Constraints from Stable(C,H,O and S) and Radiogenic(Pb) Isotopes[J].Journal of Jilin Unviersity:Earth Science Edition,2011,41(6):1770-1783. |
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| Authors: | MA Xing-hua CHEN Bin |
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| Institution: | MA Xing-hua1,CHEN Bin1,2 1.School of Earth and Space Sciences/Key Laboratory of Orogenic Belts and Crustal Evolution of Ministry of Education,Peking University,Beijing 100871,China 2.Institute of Geology and Exploration Engineering,Xinjiang University,Urumqi 830046,China |
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| Abstract: | Stable(C,H,O and S) and radiogenic(Pb) isotopes of hydrothermal solutions from the Aolunhua Mo-Cu deposit in southern Da Hinggan Mountains were analyzed with the purpose of determining the source of the ore-forming fluids and tracing the ore-forming process.New isotopic data indicate that the hydrothermal solutions were not from a single source.C,H,O and S isotopic compositions of the ore-forming fluids show that the metallogenic complexing agent had a hybrid origin,derived mainly from the mantle and subord... |
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| Keywords: | isotope determination fluids evolution ore-forming mechanism Aolunhua ore deposit southern Da Hinggan Mountains |
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