Characteristics of Ore-Forming Fluid and Genesis of the Shuangpengxi Gold-Copper Deposit in Qinghai Province
Received date: 2008-12-29
Revised date: 2009-04-07
Online published: 2009-05-10
Based on the study of the fluid inclusion, thermometry and isotopes analyses, the characteristics of oreforming fluid, fluid evolution and the origin of the Shuangpengxi gold-copper deposit were discussed and systematically studied. The results showed that: ①These inclusions consisted of mainly 2 phases of gas and liquid. Analysis showed that the compositions of liquid and gas in the inclusions were Na+,K+,Ca2+,SO42-,Cl-,H2O,CO2.②The homogenization temperature, salinity and density and pressure of fluid inclusions for the mineralization, ranged from 210℃ to 460℃，and 3.0％ to 6.5％，and 0.600 to 0.800（g/cm3），and 8.0 to 20.0 MPa,respectively being middle-high temperature, middle salinity, middle density and middle pressure fluid.③Pb isotope 206Pb/204Pb range from 18.058 to 18.710,207Pb/204Pb range from 15.581 to 15.641, 208Pb/204Pb range from 38.191 to 38.531, δ34S value(‰) range from +3.1 to +6.2(average +4.42),indicating that the source of Pb and S from crust mantle mixed origin.
Key words： Ore-forming fluid; Inclusion; Shuangpengxi; Qinghai.
FU Xiao-Meng . Characteristics of Ore-Forming Fluid and Genesis of the Shuangpengxi Gold-Copper Deposit in Qinghai Province[J]. Advances in Earth Science, 2009 , 24(5) : 531 -537 . DOI: 10.11867/j.issn.1001-8166.2009.05.0531
[1] Yin Hongfu,Zhang Kexin.Evolution and characteristics of the central orogenic belt[J].Earth Science—Journal of China University of Geosciences, 1998,23(5):437-441.[殷鸿福，张克信.中央造山带的演化及其特点[J].地球科学——中国地质大学学报, 1998,23(5):437-441.]
[2] Zhu Yunhai,Zhang Kexin,Chen Nengsong,et al.Determination of different ophiolitic belts in eastern Kunlun orogenic zone and their tectonic significance[J].Earth Science—Journal of China University of Geosciences,1999, 24(2):134-138.[朱云海,张克信,陈能松,等.东昆仑造山带不同蛇绿岩带的厘定及其构造意义[J]. 地球科学——中国地质大学学报, 1999,24(2):134-138.]
[3] Zhang K X,Huang J C,Yin H F,et al. Application of radiolarians and other fossils in non-Smithstrata:Exemplified by the Animaqing mélange belt in eastern Kunlun Mountains[J].Science in China (Series D), 2000, 43(4):364-374.
[4] Zhang Kexin, Zhu Yunhai, Yin Hongfu, et al.Application of tectonic facies in geological mapping in East Kunlun orogenic belt[J].Earth Science—Journal of China University of Geosciences, 2004,29(6):661-666.[张克信,朱云海,殷鸿福,等.大地构造相在东昆仑造山带地质填图中的应用[J]. 地球科学——中国地质大学学报, 2004,29(6):661-666.]
[5] Kou Xiaohu,Zhu Yunhai,Zhang Kexin,et al.Discovery and geochemistry of upper Permian volcanic rocks in Tongren Area, Qinghai province and their tectonic significance[J].Earth Science—Journal of China University of Geosciences,2007,32(1):45-58.[寇晓虎,朱云海,张克信,等.青海省同仁地区上二叠统石关组上部火山岩的新发现及其地球化学特征和构造环境意义[J]. 地球科学——中国地质大学学报, 2007,32(1):45-58.]
[6] Zhang Tao. Ore-forming conditions and metallogeny of Gold deposit in Shuangpengxi-Xiechangzhigou,Qinghai province[J].Northwestern Geology, 2007，40（3）：62-66.[张涛.青海双朋西—斜长支沟地区金矿成矿地质条件及成矿规律[J].西北地质，2007，40（3）：62-66.]
[7] Li Shixin.The related characteristics of supergene oxidized zone of Shuang-Peng-Xi gold deposit, Qinghai province[J].Gold, 1998，19（10）：9-11.[李时新.青海双朋西金矿表生氧化带的某些特征[J].黄金，1998，19（10）：9-11.]
[8] Sun Jisheng, Wei Junhao, Wang Zaocheng.The laws of ore-forming and prospecting marks of Shuangpengxi gold deposit in Qinghai[J].Gansu Metallurgy, 2005，27（4）：22-24.[孙继省，魏俊浩，王造成.青海双朋西金矿成矿规律及找矿标志[J].甘肃冶金，2005，27（4）：22-24.]
[9] Yang Jinzhong,Shen Yuanchao,Liu Tiebing,et al.Geochemical characteristics of ore-forming fluids in the Pengjiakuang gold deposit, Shandong province[J].Mineral Deposits, 2000,19(3):235-244.[杨金中,沈远超,刘铁兵,等.山东蓬家夼金矿床成矿流体地球化学特征[J].矿床地质,2000,19(3):235-244.]
[10] He Mingqin,Yang Shiyu,Liu Jiajun.Characteristics of ore-forming fluids and their origin in Jinchangqing gold(copper)ore deposits in Xiangyun,Yunnan[J].Journal of Mineralogy and Petrology, 2004,24(2):35-40.[何明勤,杨世瑜,刘家军.云南祥云金厂箐金(铜)矿床的成矿流体特征及流体来源[J].矿物岩石,2004,24(2):35-40.]
[11] Lu Huanzhang,Li Binglun, Shen Kun,et al.Geochemistry of Fluid Inclusions[M].Beijing: Geology Press, 1990:1-246.[卢焕章,李秉伦,沈昆，等.包裹体地球化学[M].北京:地质出版社,1990:1-246.]
[12] Ran Chongying.The Ore-Forming Mechanism of Kangdian Axis Stratabound Copper Deposit[M].Beijing:Geology Press,1989:2-47.[冉崇英.康滇地轴层控铜矿床的成矿机理[M].北京:地质出版社,1989:2-47.]
[13] Ran Chongying.On ore source and ore-forming fluid of Dongchuan-Yimen type copper deposit[J].Sciences in China (Series B),1989, 32(9):1 117-1 124.
[14] Liu Wei.Research on the Geochemistry Feature, Genesis and Metallogenic Prognosis in the Shihu Gold Deposit, Western Hebei Province[D].Changsha: Central South university,2007.[刘伟.冀西石湖金矿床地球化学特征、矿床成因及成矿预测研究[D].长沙：中南大学,2007.
[15] Liu Bin,Shen Kun.Formulae for calculating oxygen fugacities of fluid inclusions and their applications[J].Acta Mineralogical Sinica, 1995,15(3):291-302.[刘斌，沈昆.流体包裹体的氧逸度计算公式及其应用[J].矿物学报，1995, 15(3): 291-302.]
[16] Zhang Y G,Frantz J D.Determination of the homogenization temperatures and densities of supercritical fluids in the system NaCl-KCl-CaCl2-H2O using synthetic fluid inclusions[J].Chemical Geology,1987,64:335-350.
[17] Zartman R E, Doe B R.Plumbotectonics-the model[J].Tectonophysics, 1981,175(1/2):135-162.
[18] Ohmoto H.Systematics of sulphur and carbon isotopes in hydrothermal ore deposits[J].Economic Geology, 1972,67:551-578.
[19] Ohmoto H. Rye R O. Isotopes of sulfur and carbon[C]//Barnes H L, ed.Geochemistry of Hydrothermal Ore Deposits,Wiley: New York, 1979.
[20] Ohmoto H.Stable geochemistry of ore deposits[J].Reviews in Mineralogy and Geochemistry,1986,16(1):491-559.
[21] Rye R O, Ohmoto H.Sulphur and carbon isotopes and ore genesis[J].Reviews in Mineralogy and Geochemistry, 1974, 69:824-826.
[22] Zhang Ligang.The Application of Stable Isotopes in Geosciences[M].Xi′an: Shanxi Science and Technology Press,1985.[张理刚.稳定同位素在地质科学中的应用[M].西安:陕西科技出版社,1985.]
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