| 王春林.云南郎都铜矿地质特征与矿床成因分析[J].地质与勘探,2018,54(2):264-273 |
| 云南郎都铜矿地质特征与矿床成因分析 |
| Geological characteristics and 0re genesis of the Langdu copper deposit in Yunnan Province |
| 投稿时间：2017-08-22 修订日期：2017-10-30 |
| DOI：10.12134/j.dzykt.2018.02.005 |
| 中文关键词: 郎都铜矿 矽卡岩矿床 地质特征 矿床成因 云南 |
| 英文关键词: Langdu copper deposit, skarn deposit, geological characteristics, ore genesis, Yunnan |
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| 中文摘要: |
| 郎都铜矿位于义敦-中甸岛弧带南段，红山复式背斜北东翼。矿体主要赋存于张性破碎带、层间破碎带、褶皱的转折端以及外接触带。矿床的形成与围岩性质、构造破碎带和围岩蚀变类型有较为直接的联系。矿床类型属接触交代热液型铜矿床，与成矿有密切关系的岩体为石英二长斑岩，围岩为碳酸盐岩类中的灰岩类，典型的矽卡岩矿物为透辉石，其次为石榴子石，其中透辉石矽卡岩含矿性明显高于石榴子石矽卡岩。根据同位素研究成果,郎都铜矿的成矿年龄大致为214.8±3.8 Ma；成矿的大地构造环境属于造山带环境。成矿物质主要来源为下地壳，次为地幔，具备壳幔混合和深源-浅源混合的特征。矿床的形成是多期次交代作用叠加的结果，具典型的矽卡岩型铜矿床基本特征。 |
| 英文摘要: |
| The Langdu copper deposit is at the located northeast wing of Hongshan duplex anticline in the south section of the Yidun-Zhongdian island arc belt. Its ore bodies were deposited in tensile fracture zones, interlayer fracture zones, or at fold turning ends and outer contact belts. Formation of this copper deposit is related to the properties of surrounding rocks, structural fracture zones and the alteration types of host rocks, belonging to the contact metasomatic hydrothermal copper deposits. The rock mass closely related with mineralization is quartz diporphyry. The surrounding rock is limestone of carbonate rocks. The typical skarn minerals include diopside, followed by garnet, and the ore-bearing potential of diopside skarn is obviously higher than garnet skarn. According to the isotopic study, the mineralization age of the Langdu copper deposit is 214.8±3.8Ma, which formed in an orogenic environment. Mineralization material is most derived from the lower crust, secondly from the mantle, characterized by the mixing of the cruse and mantle and deep and shallow sources. Formation of this copper deposit is the result of the superposition of multi-stage metasomatism with basic features of skarn-type copper deposits. |
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