云南老君山锡多金属成矿区硫、铅、氢、氧同位素地球化学

doi:10.13278/j.cnki.jjuese.201601110

摘要/Abstract

摘要：

滇东南老君山成矿区是我国西南部重要的锡、钨多金属成矿区之一,本文围绕成矿区中典型矿床进行了系统取样和硫、铅、氢、氧同位素测试工作,并针对分析结果结合矿区地质情况进行了解译。研究区硫同位素δ³⁴S分布范围为-1.50‰~8.61‰,均值为2.06‰,属壳幔混合来源硫;矿物生成顺序较早的单矿物硫同位素组成为幔源,晚期偏壳源;层状矽卡岩型矿石硫同位素组成偏幔源,花岗岩和花岗斑岩的硫同位素组成为壳源,穿层石英脉型矿石硫同位素组成可分为幔源和壳源两类。铅同位素分析结果属壳幔混合来源,以壳源铅为主,铅同位素测年分析结果显示有多期地质作用对成矿有所影响。氢、氧同位素组成指示成矿流体以岩浆水为主,并有大气降水的混入。结合老君山成矿区地质、同位素组成及测年结果分析,老君山成矿区众多矿床的形成应为早加里东期海底喷流沉积、印支期区域变质和燕山期花岗岩热液叠加改造等地质因素共同作用的结果。

关键词: 地球化学, 同位素特征, 成矿流体, 成矿物质, 老君山成矿区

Abstract:

Laojunshan tin poly-metallic metallogenic region is an important resource base of tin, tungsten and other metals in the Southwest of China. S, Pb, H,and O isotopes of the typical deposits are tested, and geological interpretation is discussed. The results show that the sulfur isotope δ³⁴S ranges from -1.50‰ to 8.61‰, with an average 2.06‰, a mantle-crustal mixed source. The early crystallized minerals are characterized by mantle-source sulfur; while the late crystallized ones are tend to be with crustal source sulfur. The sulfur in stratiform skarn related ores is mantle source; while in granite and porphyry related ores the sulfur is crustal source. Quartz vein type ores could be divided into two kinds according to the sulfur source of mantle or crust. Pb isotopic characteristics indicate a mixed source of mantle and crust with the major from the crust. The oxygen and hydrogen isotopic compositions indicate that the ore forming fluids were composed of magmatic fluids in the early stage and of meteoric water in the late stage. The formation of Laojunshan tin poly-metallic metallogenic region might have been resulted from the combination of the volcanic exhalation sedimentary of Early Caledonian, the regional metamorphism of Indo-chinese,and the granitic superimposition of Late Yanshanian.

Key words: geochemistry, isotopic characteristics, ore-forming fluid, ore-forming materials, Laojunshan tin poly-metallic metallogenic region

中图分类号:

P618.4

贾福聚, 燕永锋, 伍伟, 刘晓玮. 云南老君山锡多金属成矿区硫、铅、氢、氧同位素地球化学[J]. 吉林大学学报(地球科学版), 2016, 46(1): 105-118.

Jia Fuju, Yan Yongfeng, Wu Wei, Liu Xiaowei. S,Pb,H and O Isotopic Geochemistry of Laojunshan Tin Poly-Metallic Metallogenic Region, Southeastern Yunnan Province, China[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(1): 105-118.

参考文献

[1] 周建平, 徐克勤, 华仁民, 等. 滇东南锡多金属矿床成因商榷[J]. 云南地质, 1997, 16(4):309-349. Zhou Jianping, Xu Keqin, Hua Renmin, et al. A Discussion on Genesis of the Tin Polymetallic Sulfide Deposits of Southeastern Yunnan[J]. Yunnan Geology, 1997, 16(4):309-349.

[2] 丁星妤, 戴塔根, 刘晓玮. 滇东南南部多金属成矿带找矿潜力分析[J]. 吉林大学学报(地球科学版), 2012, 42(6):1730-1739. Ding Xingyu, Dai Tagen, Liu Xiaowei. Ore Prospecting Potential of the Polymetallic Metallogenic Belt in the South of SE Yunnan[J]. Journal of Jilin University(Earth Science Edition), 2012, 42(6):1730-1739.

[3] 宋焕斌. 云南东南部都龙锡石-硫化物型矿床的成矿特征[J]. 矿床地质, 1989, 8(4):29-38. Song Huanbin. Ore Froming Characteristics of the Dulong Cassiterite Sulfide Type Ore Deposit in Southeastern Yunnan[J]. Mineral Deposits, 1989, 8(4):29-38.

[4] 安保华. 老君山岩体特征、成因及其找矿意义探讨[J]. 西南矿产地质, 1990, 4(1):30-35. An Baohua. Discussion on the Characteristics, Genesis and Exploration Significance of the Laojunshan Granites[J]. Geology of Ore Deposits in Southwest China, 1990, 4(1):30-35.

[5] 官容生. 滇东南构造岩浆带花岗岩体的含矿性探讨[J]. 矿物岩石, 1991,11(1):92-101. Guan Rongsheng. An Approach of Mineralization of Granite Mass in the Structure Tectonic Magmatic Belt in the Southeast of Yunnan[J]. Minerals and Rocks, 1991,11(1):92-101.

[6] 付国辉. 云南都龙锡多金属矿床地质特征及成矿规律[J]. 西南矿产地质, 1992, 6(2):25-37. Fu Guohui. Geological Characteristics and Mineralization Regularity of the Dulong Sn Polymetallic Deposit, Yunnan Province[J]. Geology of Ore Deposits in Southwest China, 1992, 6(2):25-37.

[7] 王学焜. 麻栗坡新寨锡矿床地质地球化学特征[J]. 云南地质, 1994, 13(1):1-16. Wang Xuekun. Geological-Geochemical Characteristics of Xinzhai Tin Deposit in Malipo[J]. Yunnan Geology, 1994, 13(1):1-16.

[8] 周建平, 徐克勤, 华仁民,等. 滇东南喷流沉积块状硫化物特征与矿床成因[J]. 矿物学报, 1998, 18(2):158-168. Zhou Jianping, Xu Keqin, Hua Renmin, et al. Characteristics and Genesis of Exhalative Sedimentary Massive Sulfides in Southeastern Yunnan Province[J]. Acta Mineralogica Sinica, 1998, 18(2):158-168.

[9] 曾志刚, 李朝阳, 刘玉平, 等. 老君山成矿区变质成因矽卡岩的地质地球化学特征[J].矿物学报, 1999, 19(1):48-55. Zeng Zhigang, Li Chaoyang, Liu Yuping, et al. Geology and Geochemistry of Metamorphogenic Skarn from Laojunshan Metallogenic Province[J]. Acta Mineralogica Sinica, 1999, 19(1):48-55.

[10] 刘玉平, 李朝阳, 刘家军. 都龙矿床含矿层状矽卡岩成因的地质地球化学证据[J]. 矿物学报, 2000, 20(4):378-383. Liu Yuping, Li Chaoyang, Liu Jiajun. Characteristics and Genesis of Stratiform Skarn from Dulong Tin-Zinc Polymetallic Deposit[J]. Acta Mineralogica Sinica, 2000, 20(4):378-383.

[11] 秦德先. 近年在我国三个大型锡矿床中相继发现的火山(成矿)作用及其科学意义[J]. 昆明理工大学学报:理工版, 2008, 33(1):Ⅰ-Ⅱ. Qin Dexian. Discovery of Volcanic Mineralization of Three Giant Sn Deposits in Our Country in Recent Years and Its Science Significance[J]. Journal of Kunming University of Science and Technolog:Natural Science Edition, 2008, 33(1):Ⅰ-Ⅱ.

[12] 戴婕, 张林奎, 潘晓东, 等. 滇东南南秧田白钨矿矿床矽卡岩矿物学特征及成因探讨[J].岩矿测试, 2011, 30(3):269-275. Dai Jie, Zhang Linkui, Pan Xiaodong, et al. Mineralogical Characteristics and Genesis Discussion of Skarn in Nanyangtian Sheelite Deposite of Southestern Yunnan[J]. Rock And Mineral Analysis, 2011, 30(3):269-275.

[13] 石洪召, 张林奎, 任光明, 等. 云南麻栗坡南秧田白钨矿床层控似矽卡岩成因探讨[J]. 中国地质, 2011, 38(3):67-69. Shi Hongzhao, Zhang Linkui, Ren Guangming, et al. The Genesis of Skarnoid from the Nanyangtian Stratabound Scheelite Deposit in Malipo, Yunnan Province[J]. Geology in China, 2011, 38(3):67-69.

[14] 张世涛,冯明刚,吕伟. 滇东南南温河变质核杂岩解析[J]. 中国区域地质, 1998, 17(4):390-397. Zhang Shitao, Feng Minggang, Lü Wei. Analysis of the Nanwenhe Metamorphic Core Complex Southeastern Yunnan[J]. Chinese Regional Geology, 1998, 17(4):390-397.

[15] 李东旭, 许顺山. 变质核杂岩的旋扭成因:滇东南老君山变质核杂岩的构造解析[J].地质论评, 2000, 46(2):113-119. Li Dongxu, Xu Shunshan. Rotation-Shearing of Metamorphic Core Complex:Structure Analysis of Metam Orphic More Momplex in Laojunshan, Southeastern Yunnan Province[J]. Geological Review, 2000, 46(2):113-119.

[16] Yan D P, Zhou M F, Wang C Y, et al. Structural Styles and Chronological Evidences from Dulong-Song Chay Tectonic Dome:Earlier Spreading of South China Sea Basin due to Late Mesozoic to Early Cenozoic Extension of South China Block[J]. Earth Science-Journal of China University of Geosciences, 2005, 30(4):402-412.

[17] Yan D P, Zhou M F, Wang C Y, et al. Structural and Geochronological Constraints on the Tectonic Evolution of the Dulong-Song Chay Tectonic Dome in Yunnan Province, SW China[J]. Journal of Asian Earth Sciences, 2006, 28(4):332-353.

[18] 刘玉平,徐伟,廖震,等. 老君山变质核杂岩隆升的热历史解析与动力学机制探讨[J]. 矿物岩石地球化学通报, 2007, 26(增刊1):87-88. Liu Yuping,Xu Wei,Liao Zhen, et al. Thermal History Analysis and Dynamic Mechanism of Metamorphic Core Complex in Laojunshan Bulletin of Mineralogy[J]. Petrology and Geochemistry, 2007, 26(Sup.1):87-88.

[19] 冯佳睿, 毛景文, 裴荣富, 等. 滇东南老君山地区印支期成矿事件初探:以新寨锡矿床和南秧田钨矿床为例[J]. 矿床地质,2011, 30(1):57-73. Feng Jiarui, Mao Jingwen, Pei Rongfu, et al. Atentative Discussion on Indosinian Ore-Forming Events in Laojunshan Area of Southeastern Yunnan:A Case Study of Xinzhai Tin Deposit and Nanyangtian Tungsten Deposit[J]. Mineral Deposits, 2011, 30(1):57-73.

[20] 贾福聚. 云南老君山成矿区成矿系列及成矿规律研究[D]. 昆明:昆明理工大学, 2010:1-126. Jia Fuju. Researches on Metallogenic Series and Metallogenic Regularities in Laojunshan Metallogenic Belt, Yunnan Province[D]. Kunming:Kunming University of Science and Technology, 2010:1-126.

[21] 贾福聚, 高建国, 念红良,等. 滇东南老君山锡多金属成矿区含矿岩系稀土元素地球化学[J]. 矿物学报, 2013, 33(4):658-664. Jia Fuju, Gao Jianguo, Nian Hongliang, et al. REE Geochemistry of Ore-Bearing Rocks in the Laojunshan Tin Poly-Metallic Metallogenic Region, Southeastern Yunnan Province, China[J]. Acta Mineral Sinica, 2013, 33(4):658-664.

[22] Chaussidon M, Lorand J P. Sulphur Isotope Composition of Orogenic Spinel Herzolite Massifs from Ariege (North-Eastern Pyrenees, France):An Ion Microprobe Study[J]. Geochimica et Cosmochimica Acta, 1990, 54(10):2835-2846.

[23] 张理刚. 稳定同位素在地质科学中的应用:金属活化热液成矿作用及找矿[M]. 西安:陕西科学技术出版社, 1985:16-250. Zhang Ligang. Stable Lisotope Applications in Geological Science:Hydrothermal Mineralization of Metal Activation and Prospecting[M]. Xi'an:Shaanxi Science and Technology Press, 1985:16-250.

[24] Doe B R, Zartman R E. Plumbotectonics, the Pha-nerozoic[J]. Geochemistry of Hydrothermal Ore Deposits, 1979, 2:22-70.

[25] Zartman R E, Doe B R. Plumbotectonics:The Model[J]. Tectonophysics, 1981, 75(1):135-162.

[26] 吴开兴, 胡瑞忠, 毕献武, 等. 矿石铅同位素示踪成矿物质来源综述[J]. 地质地球化学, 2002, 30(3):73-81. Wu Kaixing, Hu Ruizhong, Bi Xianwu,et al. Ore Lead Isotopes as a Tracer for Ore-Forming Material Sources:A Review[J]. Geology-Geochemistry, 2002, 30(3):73-81.

[27] 西南地质勘探局306队. 新寨锡矿详查报告[R]. 昆明:云南省地质资料馆, 1988. Team 306 of Southwest Geological Exploration Bureau. Detailed Survey Report of Xinzhai Tin Deposit[R]. Kunming:Geological Archives of Yunnan Province, 1988.

[28] 刘玉平, 李正祥, 李惠民, 等. 都龙锡锌矿床锡石U-Pb年代学:滇东南白垩纪大规模花岗岩-成矿事件[J]. 岩石学报, 2007, 23(5):967-976. Liu Yuping, Li Zhengxiang, Li Huimin, et al. U-Pb Geochronology of Cassiterite and Zircon from the Dulong Sn-Zn Deposit:Evidence for Cretaceous Large-Scale Granitic Magmatism and Mineralization Events in Southeastern Yunnan Province, China[J]. Acta Petrologica Sinica, 2007, 23(5):967-976.

[29] 冯佳睿, 毛景文, 裴荣富, 等. 云南瓦渣钨矿区老君山花岗岩体的SHRIMP锆石U-Pb定年、地球化学特征及成因探讨[J]. 岩石学报,2010, 26(3):845-857. Feng Jiarui, Mao Jingwen, Pei Rongfu, et al. SHRIMP Zircon U-Pb Dating and Geochemical Characteristics of Laojunshan Granite Intrusion from the Wazha Tungsten Deposit, Yunman Province and Their Implications for Petrogenesis[J]. Acta Petrologica Sinica, 2010, 26(3):845-857.

[30] Ohmoto H. Stable Isotope Geochemistry of Ore Deposits[J]. Reviews in Mineralogy and Geochemistry, 1986, 16(1):491-559.

[31] Sheppard S M F. Characterization and Isotopic Variations in Natural Waters[J]. Reviews in Mineralogy and Geochemistry, 1986, 16(1):165-183.

[32] Sheppard S M F, Taylor H P. Hydrogen and Oxygen Isotope Evidence for the Origins of Water in the Boulder Batholith and the Butte Ore Deposits, Montana[J]. Economic Geology, 1974, 69(6):926-946.

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