滇西北羊拉铜矿床里农—路农接合段构造地球化学与找矿预测  

Tectono-Geochemical Features and Orientation Prognosis of Concealed Ores of Yangla Cu Deposit, Yunnan Province, SW China

作　　者：杜丽娟[1,2] 黄智龙[1] 李波[3] 周家喜[1] 邹国富 严再飞[1] 孙海瑞[5] DU Li-juan HUANG Zhi-long LI Bo ZHOU Jia-xil ZOU Guo-fu YAN Zai-fei Sun Hai-rui(State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China University of Chinese Academy of Sciences, Beijing 100049, China Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China Yunnan Copper Group, Kunming Prospecting Design Inst China Nonferrous, Kunming 650051, China Development Research Center of China Geological Survey, Beijing 100037, China)

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳550081 [2]中国科学院大学,北京100049 [3]昆明理工大学国土资源工程学院,云南昆明650093 [4]中国有色金属工业昆明勘察设计研究院,云南昆明650051 [5]中国地质调查局发展研究中心,北京100037

出　　处：《矿物学报》2017年第4期434-442,共9页Acta Mineralogica Sinica

基　　金：中国科学院矿床地球化学国家重点实验室第12个五年计划项目(批准号:SKLODG-ZY125-02);国家自然科学基金项目(批准号:41402072);昆明理工大学重点学科建设项目(批准号:14078384)

摘　　要：羊拉铜矿床是金沙江构造带内的代表性铜矿床,其矿体产出明显受到断裂及层间破碎带控制。本文重点对羊拉矿床里农—路农接合段的3450 m中段进行了构造地球化学研究,R型聚类分析和因子分析表明:该中段断裂构造岩微量元素主要表现为地层岩石微量元素组合(Nb、Hf、Ta、Zr、Rb、V、Sc、Th、Cs、Be、Ga、Li、REE、Ba、Cr、U、Co、Tl、Ge、(Ag、In、Sn、Cu)),中-高温成矿元素组合(Cd、Pb、Bi、Ag、As、Sn、In、Sb、Cu、Zn、Ge、Tl、Mo、U、(Co、Ga))和地质意义不明元素组合(Ni、Sr),揭示羊拉矿床的形成可能经历了成矿前期成矿元素的初步富集和成矿期退夕卡岩化过程中成矿元素的沉淀成矿。构造地球化学异常的分布则指示了找矿预测靶区。Yangla Cu deposit is the most representative deposit in Jinshajiang tectonic belt. Its orebodies are obviously controlled by fault and interformational fracture zones. This study focuses on the tectono-geochemistry of the junction area between Linong and Lunong ore sections, and shows three element associations, i.e., the strata rock elements （Nb, Hf, Ta, Zr, Rb, V, Sc, Th, Cs, Be, Ga, Li, REE, Ba, Cr, U, Co, T1, Ge and （Ag, In, Sn, Cu））, medium-high temperature ore-forming elements （Cd, Pb, Bi, Ag, As, Sn, In, Sb, Cu, Zn, Ge, Tl, Mo, U and （Co, Ga）） and elements with unclear geological implication （Ni and Sr）, based on cluster and factor analyses. This result indicates that Yangla orebodies formed mainly by retrograde skam alteration in the ore stage, and the ore-forming elements probably enriched in the pre-ore stage. Besides, the distribution of tectonic geochemical anomalies provides a target for further exploration engineering.

关 键 词：构造地球化学 找矿预测 羊拉铜矿床 滇西北 

分 类 号：P612[天文地球—矿床学] P618.41[天文地球—地质学]