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1. 中国地质调查局昆明自然资源综合调查中心
2. 中国地质学会热液型金铜多金属矿成矿规律与有效勘查技术创新基地
3. 中国地质大学(北京)地球科学与资源学院
4. 中国地质调查局地球物理调查中心
5. 中国地质调查局廊坊自然资源综合调查中心
Published:2026
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管继云, 张七道, 曹毅, et al. 滇东南那能金矿矿床成因:来自硫化物原位微量元素和同位素的证据[J]. Bulletin of Geological Science and Technology, 2026, 45(2): 33-47.
管继云, 张七道, 曹毅, et al. 滇东南那能金矿矿床成因:来自硫化物原位微量元素和同位素的证据[J]. Bulletin of Geological Science and Technology, 2026, 45(2): 33-47. DOI: 10.19509/j.cnki.dzkq.tb20240520.
那能金矿床是滇东南地区一个重要的中型卡林型金矿,野外调研和室内岩相学观察表明该金矿发育2期黄铁矿(PyⅠ和PyⅡ),利用激光剥蚀电感耦合等离子体质谱法(LA-ICP-MS)对载金矿物黄铁矿和毒砂开展了原位微量元素分析,并结合硫同位素分析,探讨了成矿物质来源和矿床成因。LA-ICP-MS分析结果显示PyⅠ含有一定量的Au(质量分数均值6.37×10
-6
),主要富集Co、Ni、Se、W等元素;与PyⅠ相比,PyⅡ微量元素分布特征相似,但Au质量分数(均值68.02×10
-6
)偏高,相对富集Au、As、Sb、Cu等元素;毒砂中Au质量分数均值为36.02×10
-6
,主要富集As、Ni、Sb、Se、Au等元素,Zn、Ag、Hg、Tl元素含量较低。载金矿物δ
34
S值分布范围较为一致,主要集中在13.7‰~16.5‰,暗示载金矿物的S可能主要来自于围岩。初步分析表明,那能金矿形成过程中,富含Au、As、Sb等微量元素的中低温热液流体,在相对稳定的成矿环境中形成PyⅠ黄铁矿,少量Au以固溶体(Au
+
)形式与PyⅠ同时沉淀,在PyⅡ阶段,区内强烈的构造活动使得成矿流体沿断裂上涌,与围岩发生硫化反应后,流体中H
2
S浓度降低,Au-HS络合物失稳,Au过饱和沉淀后以纳米级包裹体(Au
0
)形式在PyⅡ黄铁矿中大量富集。研究成果对滇东南地区卡林型金矿床勘探与成矿规律研究具有重要指导意义。
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