云南普朗斑岩铜矿床地质特征
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摘要
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。
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 hy-drothermal 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.
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 hy-drothermal 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.
引文
(1) 中国地质调查局.国内外斑岩型铜矿研究进展,2002.
(1) 范玉华,等.云南迪庆普朗铜矿首采区勘探地质报告.云南省地质调查院,2005.
[1]侯增谦,钟大赉,邓万明.青藏高原东缘斑岩铜钼金成矿带的构造 模式[J].中国地质,2004,31(1):1-14. Hou Zengqian,Zhong Dalai,Deng Wanming.A tectonic model for porphyry copper -molybdenum -gold metallogenic belts on the eastrn margin of the Qinghai Tibet Plateau [J].Geology in China, 2004,31(1): l-14(in Chinese with English abstract).
[2]芮宗瑶,陆彦,李光明,等.西藏斑岩铜矿的前景展望[J].中国地质, 2003,30(3):302-308. Rui Zongyao, Lu Yan.Li Guangming,et al. Looking forward to the prospects of porphyry copper deposits in Tibet [J].Geology in Chna, 2003,30(3) :302-308(in Chinese with English abstract).
[3]谢学锦.全球地球化学填图[J].中国地质,2003,30(1):1-9. Xie Xuejing.Global geochemical mapping [J]. Geology in China, 2003,30(1) :1-9(in Chinese with English abstract).
[4]翟裕生.中国区域成矿特征及若干值得重视的成矿环境[J].中国地 质,2003,30(4):337-342. Zhai Yusheng. Regional metallogeonic features and some important ore-forming environments of China[J]. Geology in China,2003,30(4): 337-342(in Chinese with English abstract).
[5]侯增谦,等.三江敦岛弧碰撞造山过程与成矿系统[M].北京:地质 出版社,2003. Hou Zengqian, et al. Shanjiang Island-arc Collisional Orogenic Process and Minerogenetic System[M]. Beijing: Geological Publishing House,2003(in Chinese with English abstract).
[6]潭雪春.滇西主要有色金属矿床区域成矿地质背景[J].云南地质, 1991,10(1):11-43. Tang XuechunRegional mineralization geological background of main metallic ore deposits in western Yunnan [J]. Geology of Yunnan, 1991,10(1):11-43(in Chinese with English abstract).
[7]曾普胜,莫宣学,喻学惠.滇西富碱斑岩带的Nd、Sr、Pb同位素特 征及其挤压走滑背景[J].岩石矿物学杂志,2002,21(3):231-241. Zeng Pusheng, Mo Xuanxue,Yu Xuehui. Nd, Sr and Pb isotopic characteristics of the alkaline -rich porphyries in western Yunnan and its compression strike-slip setting [J]. Acta Petrologica et Min-eralogica,2002,21(3):231-241(in Chinese with English abstract).
[8]曾普胜,莫宣学,喻学惠,等.滇西北中甸斑岩及斑岩铜矿[J].矿 床地质,2003,22(4):393-400. Zeng Pusheng, Mo Xuanxue,Yu Xuehui,et al. Porphyries and porphyry copper deposits in Zhongdian Area, Northwestern Yunnan [J]. Mineral Deposits, 2003,22 (4): 393 -400 (in Chinese with English abstract).
(1) 范玉华,等.云南迪庆普朗铜矿首采区勘探地质报告.云南省地质调查院,2005.
[1]侯增谦,钟大赉,邓万明.青藏高原东缘斑岩铜钼金成矿带的构造 模式[J].中国地质,2004,31(1):1-14. Hou Zengqian,Zhong Dalai,Deng Wanming.A tectonic model for porphyry copper -molybdenum -gold metallogenic belts on the eastrn margin of the Qinghai Tibet Plateau [J].Geology in China, 2004,31(1): l-14(in Chinese with English abstract).
[2]芮宗瑶,陆彦,李光明,等.西藏斑岩铜矿的前景展望[J].中国地质, 2003,30(3):302-308. Rui Zongyao, Lu Yan.Li Guangming,et al. Looking forward to the prospects of porphyry copper deposits in Tibet [J].Geology in Chna, 2003,30(3) :302-308(in Chinese with English abstract).
[3]谢学锦.全球地球化学填图[J].中国地质,2003,30(1):1-9. Xie Xuejing.Global geochemical mapping [J]. Geology in China, 2003,30(1) :1-9(in Chinese with English abstract).
[4]翟裕生.中国区域成矿特征及若干值得重视的成矿环境[J].中国地 质,2003,30(4):337-342. Zhai Yusheng. Regional metallogeonic features and some important ore-forming environments of China[J]. Geology in China,2003,30(4): 337-342(in Chinese with English abstract).
[5]侯增谦,等.三江敦岛弧碰撞造山过程与成矿系统[M].北京:地质 出版社,2003. Hou Zengqian, et al. Shanjiang Island-arc Collisional Orogenic Process and Minerogenetic System[M]. Beijing: Geological Publishing House,2003(in Chinese with English abstract).
[6]潭雪春.滇西主要有色金属矿床区域成矿地质背景[J].云南地质, 1991,10(1):11-43. Tang XuechunRegional mineralization geological background of main metallic ore deposits in western Yunnan [J]. Geology of Yunnan, 1991,10(1):11-43(in Chinese with English abstract).
[7]曾普胜,莫宣学,喻学惠.滇西富碱斑岩带的Nd、Sr、Pb同位素特 征及其挤压走滑背景[J].岩石矿物学杂志,2002,21(3):231-241. Zeng Pusheng, Mo Xuanxue,Yu Xuehui. Nd, Sr and Pb isotopic characteristics of the alkaline -rich porphyries in western Yunnan and its compression strike-slip setting [J]. Acta Petrologica et Min-eralogica,2002,21(3):231-241(in Chinese with English abstract).
[8]曾普胜,莫宣学,喻学惠,等.滇西北中甸斑岩及斑岩铜矿[J].矿 床地质,2003,22(4):393-400. Zeng Pusheng, Mo Xuanxue,Yu Xuehui,et al. Porphyries and porphyry copper deposits in Zhongdian Area, Northwestern Yunnan [J]. Mineral Deposits, 2003,22 (4): 393 -400 (in Chinese with English abstract).
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