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引用本文:范玉华 李文昌. 云南普朗斑岩铜矿床地质特征[J]. 中国地质, 2006, 33(2): 352-362.
FAN Yu-hua, LI Wen-chang. Geological characteristics of the Pulang porphyry copper deposit, Yunnan[J]. Geology in China, 2006, 33(2): 352-362(in Chinese with English abstract).
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云南普朗斑岩铜矿床地质特征
范玉华 李文昌
云南省地质调查院,云南 大理 671000
摘要:
提要:普朗斑岩铜矿地处甘孜—理塘结合带西侧德格—中甸陆块东缘,印支期义敦—中甸岛弧带南段。矿区地层为上三叠统图姆沟组,主要出露普朗印支期复式中酸性斑(玢)岩体,构造裂隙发育,岩石蚀变强烈,具典型的“斑岩型”蚀变分带:由中心向外依次为强硅化带→硅化钾化带→绢英岩化带→青磐岩化带。岩浆岩、岩浆侵位的地层、热液蚀变作用、热液运移和矿质沉淀的构造空间控制了本矿床的产出。其成矿作用发生于普朗复式斑岩体内,矿化与蚀变相伴进行,在岩体中心形成由细脉浸染状矿石组成的筒状矿体,岩体边部产出脉状矿体。成矿元素以铜为主,伴有金、银、钼、钯、硫等多种有用组分。矿床规模达到超大型。
关键词:  斑岩型铜矿  地质特征  普朗
DOI:
分类号:
基金项目:中国地质调查局地质大调查项目(200210200017)资助。
Geological characteristics of the Pulang porphyry copper deposit, Yunnan
FAN Yu-hua, LI Wen-chang
Yunnan Institute of Geological Survey,Dali 671000,Yunnan,China
Abstract:
Abstract:The Pulang porphyry copper deposit is located on the eastern margin of the Dege-Zhongdian block on the western side of the Garze-Litang junction zone, in the southern segment of the Indosinian Yidun-Zhongdian island-arc belt. The strata of the copper district are the Upper Triassic Tumugou Formation, and there mainly outcrops the Indosinian Pulang composite intermediate-acid porphyry. Structural fissures are well developed and rocks are strongly altered, showing typical “porphyry type” alteration zoning with intense silicic alteration zone → silicic-potassic alteration zone → phyllic alteration zone → propylitic alteration zone from the center outward. Magmatic rocks, strata emplaced by magma, hydrothermal alteration and structural space for hydrothermal fluid transport and deposition of ore substances controlled the occurrence of this deposit. The mineralization occurred in the Pulang composite porphyry and mineralization and alteration occur in company. A pipe-shaped orebody composed of veinlet-disseminated ores formed in the center of the intrusion and vein-shaped orebodies formed at edges of the intrusion. The dominant ore element of the deposit is copper, with many subordinate useful components such as gold, silver, molybdenum, palladium and sulfur. The deposit reaches the superlarge size.
Key words:  porphyry copper deposit  geological characteristics  Pulang