ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

    • 中文核心期刊
    • CSCD收录期刊
    • 中国科技核心期刊
    • Scopus收录期刊
高级检索

金宝山铂钯矿与国外大型层状岩体中的铂钯矿床对比

段星星, 董会, 曹佰迪, 杜辉, 李文明, 刘拓, 王立社

段星星, 董会, 曹佰迪, 等. 金宝山铂钯矿与国外大型层状岩体中的铂钯矿床对比[J]. 西北地质, 2016, 49(1): 185-196.
引用本文: 段星星, 董会, 曹佰迪, 等. 金宝山铂钯矿与国外大型层状岩体中的铂钯矿床对比[J]. 西北地质, 2016, 49(1): 185-196.
DUAN Xingxing, DONG Hui, CAO Baidi, et al. Comparison of Jinbaoshan PGE Deposit and other Foreign PGE Deposits in Large Layered Intrusion[J]. Northwestern Geology, 2016, 49(1): 185-196.
Citation: DUAN Xingxing, DONG Hui, CAO Baidi, et al. Comparison of Jinbaoshan PGE Deposit and other Foreign PGE Deposits in Large Layered Intrusion[J]. Northwestern Geology, 2016, 49(1): 185-196.

金宝山铂钯矿与国外大型层状岩体中的铂钯矿床对比

Comparison of Jinbaoshan PGE Deposit and other Foreign PGE Deposits in Large Layered Intrusion

  • 摘要: 金宝山铂钯矿床是我国目前发现的最大的独立铂钯矿床,而世界上著名的铂族元素矿床主要有Bushveld和Stillwater等矿床.笔者总结了金宝山与Bushveld和Stillwater矿床在构造背景、岩体类型、岩石组合、地球化学等方面的异同:金宝山矿床(260Ma)的产出构造背景是峨眉山大火成岩省,Bushveld产于克拉通区(2.06Ga),Stillwater(2.70)产于陆内裂谷,总体而言,均产于较稳定的构造环境.但金宝山矿床形成时代新,构造环境的稳定程度较二者差一些,这种差异在岩体规模上反映出来,虽然三者的岩体类型都属层状岩体,但金宝山岩体出露面积不到3km2,远小于Bushveld(65 000 km2)和Stillwater(376km2)岩体.金宝山岩体的岩石类型较为简单,岩石类型主要为单辉橄榄岩,以及少量橄榄辉石岩和辉石岩,而形成Bushveld和Stillwater岩体母岩浆的种类多,分异彻底,岩石类型十分丰富.与Bushveld和Stillwater岩体相比,金宝山岩体的橄榄石、辉石成分变化较小;地球化学以贫Si、富Mg为特征.金宝山矿床的赋矿层位和含矿岩性与Bushveld的Platreef层相似,金宝山矿床PGE最高品位为1.5×10-6,低于Stillwater的J-M层(20×10-6)、Bushveld的Platreef(5×10-6)和Merensky(5×10-6~7×10-6).岩体规模、岩浆分异程度、熔离作用等的差异致使金宝山矿床的规模远不及Bushveld和Stillwater矿床.
    Abstract: The Jinbaoshan Pt-Pd deposit is the largest independent Pt-Pd deposits in China at present, and the world famous PGE deposits are mainly Bushveld and Stillwater deposits. In this paper, the similarities and differences of tectonic setting, intrusion type, rock assemblages, geochemistry among Jin Baoshan, Bushveld and Stillwater deposits have been summarized. The results show that the Jinbaoshan deposit (260Ma) was occurred in the Emeishan Large Igneous Province, which is located at relatively stable tectonic environment, but its stable degree of tectonic environment is less than Bushveld (2.06Ga) that developed from craton and Stillwater (2.70Ga) from intracontinental rift, and these differences have been reflected in the scale of intrusion. Although these three intrusions are layered intrusion, the exposed area of the Jinbaoshan intusion is less than 3 km2, far less than the Bushveld (65 000 km2) and Stillwater (376 km2). The rock types of the Jinbaoshan intusion is relatively simple, are mainly wehrlite and a small amount of olive pyroxenite and pyroxenite, while Bushveld and Stillwater are derived from a variety of primary magmas with thoroughly differentiation and have many rock types from ultramafic rock to mafic rocks. Compared with the Bushveld and Stillwater, the compositions of olivine and pyroxene in the Jinbaoshan vary small; On geochemistry, the rocks of the Jinbaoshan are characterized by silicon-poor and magnesium-rich. The occurrence and rock lithology of ores in the Jinbaoshan deposit are similar to the Platreef layers in Bushveld. The highest contents of PGE in the Jinbaoshan deposit is 1.5 ppm, lower than the J-M layer in Stillwater (20×10-6), the Platreef (5×10-6) and Merensky (5×10-6~7×10-6) in Bushveld. Affected by the differences in the scale of the intrusion, the degree of magmatic differentiation and liquation, the size of the Jin Baoshan deposits is far less than the Bushveld and Stillwater.
  • 陶琰,高振敏,罗泰义,等.云南金宝山超镁铁岩原始岩浆成分反演[J].岩石学报, 2002,18(1):70-82.
    TAO Yan, GAO Zhenmin, LUO Taiyi,et al. Inversion of primary magma composition for Jinbaoshan ultramafic intrusion, Yunnan[J].Acta Petrologica Sinica, 2002,18(1):70-82.
    陶琰,朱丹,高振敏,等.金宝山铂族元素矿床铂族元素的热液活动研究[J].矿物岩石地球化学通报, 2003,22(1):32-37.
    TAO Yan, ZHU Dan, GAO Zhenmin,et al. Study on PGE Remobilization in Jinbaoshan PGE Deposit[J]. Bulletin of Mineralogy,Petrology and Geochemistry,2003, 22(1):32-37.
    王生伟,孙晓明,石贵勇,等.云南金宝山和白马寨铜镍硫化物矿床铂族元素(PGE)地球化学的差异及其成因意义[J].地质学报, 2007,81(1):93-108.
    WANG Shengwei, SUN Xiaoming, SHI Guiyong, et al. Distinction of Platinum Group Elements (PGE) Geochemistry between the Jinbaoshan and Baimazhai Magmatic Sulfide Deposits in Yunnan Province, China, and Its Implication for Ore Genesis[J].Acta Geologica Sinica, 2007,81(1):93-108.
    苏尚国,沈存利,邓晋福,等.铂族元素的地球化学行为及全球主要铂族金属矿床类型[J]. 现代地质, 2007, 21(2):361-370.
    SU Shangguo, SHEN Cunli, DENG Jinfu, et al. Geochemistry Behavior of Platinum Group Element~ (PGE) and Main Types ofPGE Deposits in the World[J]. Geoscience,2007, 21(2):361-370.
    朱丹,陶炎,罗泰义,等.云南金宝山镁铁-超镁铁岩的地球化学特征及成因[J].矿物学报, 2003,23(1):63-69.
    ZHU Dan, TAO Yan, LUO Taiyi, et al. Geochemical and Petrological characterisitics of mafic and ultra-mafic intrusions in Jinbaoshan, Yunnan[J]. Acta Mineralogica Sinica, 2003, 23(1):63-69.
    WANG C Y, ZHOU M F, ZHAO D G. Mineral chemistry of chromite from the Permian Jinbaoshan Pt-Pd sulphide-bearing ultra-mafic intrusion in SW China with petrogenetic implications[J]. Lithos, 2005,83:47-66.
    WANG C Y, PRICHARD H M, ZHOU M F, et al. Platinum-Group minerals form the Jinbaoshan Pd-Pt deposit, SW China: Ev-idence for magmatic origin and hydrothermal alteration[J]. Mineral Depsosita, 2008, 43:791-803.
    CAMPBELL I H, NALDRETT A J, BARNES S J. A model for the origin of platinum-rich sulphide horizons in the Bushveld and Stillwater Complexes[J]. J Petro.1983,24:133-165.
    MCDONALD I, HOLWELL D A, ARMITAGE P E B. Geochemistry and mineralogy of the Platreef and "Critical Zone" cumulates of the Northern limb of the Bushveld Complex, South Africa:implications for Bushveld stratigraphy and the development of PGE mineralisation[J]. Miner Depos., 2005, 40:526-549.
    NALDRETT A J, BARNES S J. The behavior of platinum group elements during fractional crystallization and partial melting with special reference to the composition of magmatic sulfide ores[J]. Fortschr Mineral, 1986, 64 (2):113-133.
    BARNES, S J, MAIER, W D. Platinum-group elements and microstructures of normal Merensky Reef from Impala Platinum Mines, Bushveld Complex[J]. Journal of Petrology, 2002,43, 103-128.
    CAWTHORN R G, MERKLE R K W, VILJOEN M J. Platinum-groupelement deposits in the Bushveld Complex , South Africa[M]//Cabri LJ . The Geology, Geochemistry, Mineralogy and Mineral Beneficiation of Platinum-group Elements. Montreal : CIM , 2002, 54 : 389-429.
    HOLWELL D A, Jordaan A. Three-dimensional mapping of the Platreef at the Zwartfontein South mine : Implications for the timing of magmatic events in the northern limb of the Bushveld Complex South Africa[J]. Transactions of the Instituteof Mining and Metallurgy, 2006, 115: 41-48.
    MCDONALD I, HOLWELL D A, ARMITAGE PEB. Geochemist ry and mineralogy of t he Plat reef and "Critical Zone"of the nort hern lobe of the Bushveld Complex , South Africa : Implications for Bushveld Stratigraphy and t he development of PGE mineralization[J]. Mineralium Deposita , 2005,40 :526-549.
    KINNAIRD J A, KRUGER F J , NEX PAM , et al . Understanding chromitite formation —a key to understanding processes of platinum enrichment[J]. Trans Inst Min Metall Sec B Appl Eart h Sci , 2002 , 111B :B23-B35.
    NALDRETT, A.J., WILSON, A., KINNAIRD, J., Chunnett, G., PGE tenor and metal ratios within and below the Merensky Reef, Bushveld Complex: implications for its genesis[J]. Journal of Petrology 2009,50, 625-659.
    IRVINE T N , KEITH D W, TODD SG. The J-M platinum palladium reef of the Stillwater Complex, Montana. II. Origin by double convective magma mixing and implications for the Bushveld Complex[J]. Econ Geol , 1983 , 78 : 1287-1334.
    LAMBERT D D, WALKER R J, MORGAN J W, et al . Re-Os and Sm-Nd isotope geochemistry of the Stillwater Complex, Montana : implications for the petrogenesis of the J-M Reef[J]. J Petrol, 1994, 35: 1717-1753.
    IRVINE T N, SHARPE M R. Magma mixing and the origin of stratiform oxide ore zones in the Bushveld and Stillwater Complexes, in Gallagher, M.G., Ixer, R.A., Neary, C.R., and Prichard, H.M., eds., Metallogeny of basic and ultrabasic rocks[M]. London: Institution of Mining and Metallurgy, 1986, 183-198. NALDRETT A J, KINNAIRD J, WILSON A, et al. Concentration of PGE in the Earth's crust with special reference to the Bushveld complex[J]. Earth Science Frontiers, 2008, 15(5): 264-297.
    MONDAL S K, MATHEZ E A. Origin of the UG2 chromitite layer, Bushveld Complex[J]. Journal of Petrology, 2007, 48(3): 495-510.
    HULBERT L J, DUKE J M, ECKSTRAND OR,et al. Geological environments of the platinum group elements[J]. Geological Survey of Canada. Open File ,1988,1440: 3-99.
    LEE C A, BUTCHER A R. Cyclicity in the Sr isotope stratigraphy through the Merensky and Bastard Reef units, Atok section, eastern Bushveld Complex[J]. Econ. Geol., 1990, 85: 877-883.
    ARNDT N, JENNER G, OHNENSTETTER M,et al. Trace elements in the Merensky Reef and adjacent norites Bushveld Complex South Africa[J]. Mineralium Deposita, 2005, 40: 550-575.
    MCDONALD I, HOLWELL D A. Did lower zone magma conduits store PGE-rich sulphides that were later supplied to the Platreef[J]? South African Journal of Geology, 2007, 110(4): 611-616.
计量
  • 文章访问数: 
  • HTML全文浏览量:  0
  • PDF下载量: 
  • 被引次数: 0
出版历程
  • 收稿日期:  2015-05-13
  • 修回日期:  2015-09-15
  • 发布日期:  2016-03-04

目录

    /

    返回文章
    返回