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黄金科学技术 ›› 2018, Vol. 26 ›› Issue (4): 454-464.doi: 10.11872/j.issn.1005-2518.2018.04.454

• • 上一篇    下一篇

西昆仑塔什库尔干赞坎铁矿成矿物质来源的锶钕同位素约束

周振菊1,2(),陈衍景2,汤好书3,吴艳爽4,陈正乐1   

  1. 1 中国地质科学院地质力学研究所,北京 100081
    2 北京大学造山带与地壳演化教育部重点实验室,北京 100871
    3 中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州 贵阳 550002
    4 中国科学院新疆生态与地理研究所矿产资源研究中心,新疆 乌鲁木齐 830011
  • 收稿日期:2018-05-04 修回日期:2018-07-10 出版日期:2018-10-10 发布日期:2018-10-17
  • 作者简介:周振菊(1984-),女,广西荔浦人,助理研究员,从事矿床学研究工作。zhenjuzhou@126.com
  • 基金资助:
    国家自然科学基金项目“西南天山阿沙哇义造山型金矿构造—流体控矿作用研究”(41772085);“西昆仑塔什库尔干赞坎铁矿成矿作用研究”(41402061);“帕米尔地区塔什库尔干铁矿带黄铁矿—石膏/重晶石—磁铁矿建造成因研究”(41672086);“中—新生代天山造山带再造过程与砂岩型铀矿成矿作用”(U1403292);“十二五”国家科技支撑计划项目“西南天山金锑矿成矿系统与靶区优选评价”(2015BAB05B04)

Sr-Nd Isotope Constraints on the Source of Ore-forming Elements of Zankan Iron Deposit in the Taxkorgan Terrane of West Kunlun Orogen

Zhenju ZHOU1,2(),Yanjing CHEN2,Haoshu TANG3,Yanshuang WU4,Zhengle CHEN1   

  1. 1 Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China
    2 Key Laboratory of Orogen and Crustal Evolution,Peking University,Beijing 100871,China
    3 State Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,Guizhou,China
    4 Xinjiang Research Center for Mineral Resources,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China
  • Received:2018-05-04 Revised:2018-07-10 Online:2018-10-10 Published:2018-10-17

摘要:

西昆仑赞坎铁矿是塔什库尔干地区新发现的大型富铁矿,其赋矿围岩为布伦阔勒群火山—沉积变质岩系。矿体主要呈层状和似层状分布,矿石具有条带状、浸染状和块状构造。通过研究该矿床赋矿地层、矿石的硫化物钕和锶同位素组成特征,获得矿石硫化物I Sr=0.7100~0.7111,平均值为0.7103;(143Nd/144Nd) i =0.511555~0.512223,平均值为0.511827;赋矿围岩布伦阔勒群(143Nd/144Nd) i =0.511552。Sr-Nd同位素特征表明,成矿物质来源具有壳幔混合特征,主要来自海底火山喷发活动。赞坎铁矿属与海底热液有关的铁矿床,形成于早古生代原特提斯洋向南俯冲的岛弧环境。

关键词: Sr-Nd同位素, 成矿物质来源, 硫化物, 矿石, 布伦阔勒群, 赞坎铁矿, 塔什库尔干, 西昆仑

Abstract:

Zankan iron deposit is a recently discovered large iron deposit in the Taxkorgan terrane of the west Kunlun Orogen.The deposit is hosted in the metamorphosed volcanic and sedimentary rocks of the Bulunkuole Complex.The orebodies are stratiform or stratoid.The ores are uniquely composed of magnetite,pyrite and anhydrite at various ratios,and show banded,disseminated and massive structures.This paper reports Sr and Nd isotopic composition of ores and ore-hosting rocks of Bulunkuole Group to constrain sources of ore-forming material.The ores yieldI Srof 0.7100~0.7111,with an average of 0.7103;(143Nd/144Nd) i of 0.511555~0.512223,with an average of 0.511827.The biotite-quartz schists of Bulunkuole Group yield(143Nd/144Nd) i of 0.511552.The Sr-Nd isotope systematic shows a source of mixing crust and mantle.Therefore,it is concluded that the ore-forming materials mainly originated from volcanic rocks in the Bulunkuole Complex,and Zankan iron deposit was formed from an Early Cambrian seafloor hydrothermal system related to southward subduction of Proto-Tethyan plate.

Key words: Sr-Nd isotope, source of ore-forming materials, sulfide, ore, Bulunkuole group, Zankan iron deposit, Taxkorgan, west Kunlun Orogen

中图分类号: 

  • P618.31

图1

(a)西昆仑地区地质简图[28];(b)塔什库尔干地区铁矿分布地质简图[4,8] "

图2

赞坎铁矿矿区地质简图"

图3

赞坎矿区111勘探线剖面图"

图4

赞坎铁矿矿石类型 (a)条带状矿石;(b)浸染状矿石,黄铁矿呈浸染状分布;(c),(d)块状矿石,黄铁矿呈纹层状分布 Py-黄铁矿;Mag-磁铁矿;Qz-石英"

图5

赞坎铁矿矿石矿物组构特征 (a)磁铁矿呈自形—半自形晶(反射光);(b)他形黄铁矿与磁铁矿共生(反射光);(c)磁铁矿与石膏共生(正交偏光);(d)磁黄铁矿呈半自形粒状,磁黄铁矿与黄铁矿共生(反射光);(e)磁黄铁矿交代磁铁矿,黄铜矿交代磁黄铁矿(反射光);(f)黄铁矿交代磁铁矿,而后又被黄铜矿交代(反射光) Anh-石膏;Bi-黑云母;Cpy-黄铜矿;Mag-磁铁矿;Ms-白云母;Po-磁黄铁矿;Py-黄铁矿;Qz-石英"

表1

赞坎铁矿金属硫化物Sr同位素组成"

样品编号 样品名称 测试对象 Rb/(×10-6 Sr/(×10-6 87Rb/86Sr 87Sr/86Sr I sr(536 Ma)
ZK10-293 磁铁矿矿石 黄铁矿 0.12 1.33 0.2556 0.712000 0.7100
ZK10-359 磁铁矿矿石 黄铁矿 0.14 0.82 0.4828 0.714769 0.7111
ZKPM11-2 磁铁矿矿石 黄铁矿 0.09 2.18 0.1208 0.710982 0.7101
ZKPM11-4 磁铁矿矿石 黄铁矿 0.23 7.67 0.0870 0.710668 0.7100
平均值(n=4) 0.7103
布伦阔勒群
ZK10-397 黑云母石英片岩 磁黄铁矿 0.40 0.53 2.2202 0.714251 0.6973

图6

赞坎铁矿床金属硫化物及相关地质体Sr同位素组成(海水和火山岩的数据分别引自[38],[36])"

赞坎铁矿床金属硫化物Nd同位素组成"

样品编号 样品名称 测试对象 Sm/(×10-6 Nd/(×10-6 147Sm/144Nd 143Nd/144Nd 143Nd/144Nd) i εNd(536 Ma)
ZK10-293 磁铁矿矿石 黄铁矿 0.24 1.32 0.1096 0.512088 0.511703 -4.8
ZKPM11-4 磁铁矿矿石 黄铁矿 0.93 4.36 0.1291 0.512676 0.512223 5.4
ZKPM11-2 磁铁矿矿石 黄铁矿 0.16 1.05 0.0918 0.511877 0.511555 -7.7
平均值(n=3) 0.511827 -2.4
布伦阔勒群
ZK10-397 黑云母石英片岩 磁黄铁矿 0.13 0.70 0.1078 0.511931 0.511552 -7.7

图7

赞坎铁矿床金属硫化物及相关地质体Nd同位素组成(亏损地幔和火山岩的数据分别引自[41],[36])"

图8

赞坎铁矿成矿模式"

1 董连慧,冯京,庄道泽,等. 新疆地质矿产勘查回顾与展望[J].新疆地质,2011,29(1):1-6.
Dong Lianhui , Feng Jing , Zhuang Daoze ,et al. Xinjiang geological mineral exploration retrospect and prospect[J].Xinjiang Geology,2011,29(1):1-6.
2 董连慧,冯京,庄道泽,等. 新疆富铁矿成矿特征及主攻类型成矿模式探讨[J].新疆地质,2011,29(4):416-422.
Dong Lianhui , Feng Jing , Zhuang Daoze , at al . Discussion of metallogenic models,mineralization characteristic and main type of rich iron ore of Xinjiang[J].Xinjiang Geology,2011,29(4):416-422.
3 陈俊魁,燕长海,张旺生,等. 新疆塔什库尔干地区磁铁矿床地质特征与找矿方向[J].地质调查与研究,2011,34(3):179-189.
Chen Junkui , Yan Changhai , Zhang Wangsheng ,et al. Geological characteristics and prospecting direction of the magnetite iron deposits in the Taxkorgan,Xinjiang[J].Geological Survey and Research,2011,34(3):179-189.
4 Ji W H , Li R S , Chen S J ,et al. The discovery of Palaeoproterozoic volcanic rocks in the Bulunkuoler Group from the Tianshuihai Massif in Xinjiang of northwest China and its geological significance[J].Science China:Earth Sciences,2011,54(1):61-72.
5 陈勇,吴亮,张春江,等. 新疆西昆仑塔什库尔干赞坎铁矿矿床地质特征初探[J].山东国土资源,2013,29(2):18-22.
Chen Yong , Wu Liang , Zhang Chunjiang ,et al. Primary study on geological characteristics of Zankan iron deposit in Tashkurgan in western Kunlun in Xinjiang Uygur Autonomous Region[J].Land and Resources in Shandong Province,2013,29(2):18-22.
6 钱兵,高永宝,李侃,等. 塔什库尔干地区赞坎铁矿矿物学特征与成因[J].地质与勘探,2014,50(4):630-640.
Qian Bing , Gao Yongbao , Li Kan ,et al. Mineralogy and genesis of the Zankan iron deposit in Taxkorgan area,Xinjiang[J].Geology and Exploration,2014,50(4):630-640.
7 燕长海,曹新志,张旺生,等. 帕米尔式铁矿[M].北京:地质出版社,2012.
Yan Changhai , Cao Xinzhi , Zhang Wangsheng ,et al. The “Pamir-type” Iron Deposits[M].Beijing:Geological Publishing House,2012.
8 燕长海,陈曹军,曹新志,等. 新疆塔什库尔干地区“帕米尔式”铁矿床的发现及其地质意义[J].地质通报,2012,31(4):549-557.
Yan Changhai , Chen Caojun , Cao Xinzhi ,et al. The discovery of thePamir-typeiron deposits in Taxkorgan area of Xinjiang and its geological significance[J].Geological Bulletin of China,2012,31(4):549-557.
9 陈曹军. 新疆塔什库尔干地区铁矿床成矿规律及找矿方向研究[D].武汉:中国地质大学,2012.
Chen Caojun . Study of Metallogenic Regularity and Prospecting Direction of Iron Deposit in Taxkorgan Area,Xinjiang Province[D].Wuhan:China University of Geosciences,2012.
10 冯昌荣,吴海才,陈勇. 新疆塔什库尔干县赞坎铁矿地质特征及成因浅析[J].大地构造与成矿学,2011,35(3):404-409.
Feng Changrong , Wu Haicai , Chen Yong . Geological characteristics and genesis of the Zankan iron deposit in Taxkorgan Xinjiang[J].Geotectonica et Metallogenia,2011,35(3):404-409.
11 林尚康,汤好书,任涛. 西昆仑赞坎铁矿区英安斑岩锆石U-Pb年龄[J].河南地质,2015,33(6):986-992.
Lin Shangkang , Tang Haoshu , Ren Tao . In-situ U-Pb ages and Hf isotopic analyses of zircons from rhyodacite in Zankan,west Kunlun area[J].Henan Geology,2015,33(6):986-992.
12 Zhou Z J , Tang H S , Chen Y J ,et al. Trace elements of magnetite and iron isotopes of the Zankan iron deposit,westernmost Kunlun,China:A case study of seafloor hydrothermal iron deposits[J].Ore Geology Reviews,2017,80:1191-1205.
13 Zhou Z J , Tang H S , Wu Y S ,et al. Geology,geochemistry and genesis of the Zankan iron deposit in the west Kunlun Orogen,Xinjiang,China[J].Ore Geology Reviews,2017,DOI:10.1016/j.oregeorev.2017.09.009.
14 Chen Y J , Li C , Zhang J ,et al.Sr and O isotopic characteristics of porphyries in the Qinling molybdenum deposit belt and their implication to genetic mechanism and type[J].Science China:Earth Sciences,2000,43(Supp.):82-94.
15 Chen Y J , Pirajno F , Sui Y H . Isotope geochemistry of the Tieluping silver deposit,Henan,China:A case study of orogenic silver deposits and related tectonic setting[J].Mineralium Deposita,2004,39:560-575.
16 Chen Y J , Pirajno F , Qi J P . Origin of gold metallogeny and sources of ore-forming fluids in the Jiaodong province,eastern China[J].International Geology Review,2005,47:530-549.
17 Chen Y J , Pirajno F , Qi J P . The Shanggong gold deposit,eastern Qinling Orogen,China:Isotope geochemistry and implications for ore genesis[J].Journal of Asian Earth Sciences,2008,33:252-266.
18 Chen Y J , Pirajno F , Li N ,et al. Isotope systematics and fluid inclusion studies of the Qiyugou breccia pipe-hosted gold deposit,Qinling Orogen,Henan Province,China:Implications for ore genesis[J].Ore Geology Reviews,2009,35:245-261.
19 祁进平,赖勇,任康绪,等. 小秦岭金矿田成因的锶同位素约束[J].岩石学报,2006,22(10):2543-2550.
Qi Jinping , Lai Yong , Ren Kangxu ,et al. Sr-isotope constraint on the origin of the Xiaoqingling gold field[J].Acta Petrologica Sinica,2006,22(10):2543-2550.
20 祁进平,宋要武,李双庆,等. 河南省栾川县西沟铅锌银矿床铷锶同位素研究[J].岩石学报,2009,25(11):2843-2854.
Qi Jinping , Song Yaowu , Li Shuangqing ,et al. Rb-Sr isotopic composition of the Xigou Pb-Zn-Ag deposit,Luanchuan,Henan Province[J].Acta Petrologica Sinica,2009,25(11):2843-2854.
21 张莉,杨荣生,毛世东,等. 阳山金矿床锶铅同位素地球化学与成矿物质来源[J].岩石学报,2009,25(11):2811-2822.
Zhang Li , Yang Rongsheng , Mao Shidong ,et al. Sr and Pb isotope geochemistry and ore-forming material source of the Yangshan gold deposit[J].Acta Petrologica Sinica,2009,25(11):2811-2822.
22 Ni Z Y , Chen Y J , Li N ,et al. Pb-Sr-Nd isotope constraints on the fluid source of the Dahu Au-Mo deposit in Qinling Orogen,central China,and implication for Triassic tectonic setting[J].Ore Geology Reviews,2012,46:60-67.
23 Deng X H , Chen Y J , Bagas L ,et al. S-Pb-Sr-Nd isotope constraints on the genesis of the ca.850 Ma Tumen Mo-F deposit,Qinling Orogen,China[J].Precambrian Research,2015,266:108-118.
24 Deng X H , Chen Y J , Santosh M ,et al. Re-Os and Pb-Sr-Nd isotope constraints on source of fluids in the Zhifang Mo deposit,Qinling Orogen,China[J].Gondwana Research,2016,30:132-143.
25 Zhou Z J , Chen Y J , Jiang S Y ,et al. Geology,geochemistry and ore genesis of the Wenyu gold deposit,Xiaoqinling gold field,southern margin of North China Craton[J].Ore Geology Reviews,2014,59:1-20.
26 Zhou Z J , Liu Z W , Qin Y. Geology,geochemistry and genesis of the Huachanggou gold deposit,western Qinling Orogen,central China[J].Geological Journal,2014,49:424-441.
27 Zhou Z J , Chen Y J , Jiang S Y ,et al. Isotope and fluid inclusion geochemistry and ore genesis of the Qiangma gold deposit,Xiaoqinling gold field,Qinling Orogen,southern margin of North China Craton[J].Ore Geology Reviews,2015,66:47-64.
28 Yang W Q , Liu L , Cao Y T ,et al. Geochronological evidence of Indosinian (high-pressure) metamorphic event and its tectonic significance in Taxkorgan area of the Western Kunlun Mountains,NW China[J].Science China:Earth Sciences,2010,53:1445-1459.
29 王建平. 西昆仑塔什库尔干混杂岩的地质特征及其大地构造意义[J].地质通报,2008,27(12):2057-2066.
Wang Jianping . Geological features and tectonic significance of melange zone in the Taxkorgan area,west Kunlun[J].Geological Bulletin of China,2008,27(12):2057-2066.
30 许志琴,戚学祥,刘福来,等. 西昆仑康西瓦加里东期孔兹岩系及地质意义[J].地质学报,2004,78(6):733-743.
Xu Zhiqin , Qi Xuexiang , Liu Fulai ,et al. The Kangxiwar Caledonian Khondalite Series in west Kunlun,China,and its geological significance[J].Acta Geologica Sinica,2004,78(6):733-743.
31 曲军峰,张立飞,艾永亮,等. 西昆仑塔什库尔干高压麻粒岩PT轨迹、SHRIMP锆石定年及其大地构造意义[J].中国科学:地球科学,2007,37(4):429-441.
Qu Junfeng , Zhang Lifei , Ai Yongliang ,et al. High-pressure granulite from western Kunlun,northwestern China:Its metamorphic evolution,zircon SHRIMP U-Pb ages and tectonic implication[J].Science in China:Earth Sciences,2007,37(4):429-441.
32 孙海田,李纯杰,吴海,等. 西昆仑金属成矿省概论[M].北京:地质出版社,2003.
Sun Haitian , Li Chunjie , Wu Hai ,et al. Overview of Metallogenesis on Western Kunlun[M].Beijing:Geological Publishing House,2003.
33 张传林,陆松年,于海峰,等. 青藏高原北缘西昆仑造山带构造演化:来自锆石SHRIMP 及LA-ICP-MS测年的证据[J].中国科学:地球科学,2007,37(2):145-154.
Zhang Chuanlin , Lu Songnian , Yu Haifeng ,et al. Tectonic evolution of western Kunlun orogenic belt:Evidences from zircon SHRIMP and LA-ICP-MS U-Pb ages[J].Science in China:Earth Sciences,2007,37(2):145-154.
34 杨文强. 西昆仑塔县—康西瓦构造带印支期变质、岩浆作用及布伦阔勒岩群的形成时代[D].西安:西北大学,2013.
Yang Wenqiang . The Indosinian Metamorphism,Magmatism and Formation Age of Bunlunkuole Rock Group in Taxkorgan-Kangxiwar Tectonic Belt,Western Kunlun[D].Xi’an:Northwest University,2013.
35 高晓峰,校培喜,康磊,等. 新疆塔什库尔干塔阿西一带火山岩成因及地质意义[J].地球科学,2013,38(6):1169-1182.
Gao Xiaofeng , Xiao Peixi , Kang Lei ,et al. Origin of the volcanic rocks from the Ta’axi region,Taxkorgan Xinjiang and its geological significance[J].Earth Science,2013,38(6):1169-1182.
36 董连慧,陈衍景,李基宏,等. 环塔里木前寒武纪成矿作用及大型找矿靶区调查[R].乌鲁木齐:新疆维吾尔自治区地质调查院,2016.
Dong Lianhui , Chen Yanjing , Li Jihong ,et al. Precambrian mineralization and exploration targeting in the circum Tarim area[R].Urumqi:Geological Survey Institute of Xinjiang Uygur Autonomous Region,2016.
37 李智泉,张连昌,薛春纪,等. 西昆仑赞坎铁矿地质和地球化学特征及矿床类型探讨[J].地质科学,2015,50(1):100-117.
Li Zhiquan , Zhang Lianchang , Xue Chunji ,et al. Geological and geochemical characteristics of Zankan iron deposit in the west Kunlun Mountains[J].Chinese Journal of Geology,2015,50(1):100-117.
38 韦刚健. 海水中Sr同位素组成变化的环境意义与Sr同位素地层学[J].海洋科学,1995,19(1):23-25.
Wei Gangjian . Evolution of the Sr isotope of the sea-water:Implications for palaeoenvironment and application of the strontium isotope stratigraphy[J].Marine Sciences,1995,19(1):23-25.
39 Hamilton P J , Evensen N M , O’Nions R K . Sm-Nd systematics of Lewisian gneisses:Implications for the origin of granulites[J].Nature,1979,277(5691):25-28.
40 Jacobsen S B , Wasserburg G J . Sm-Nd Isotopic Evolution of Chondrites[J].Earth and Planetary Science Letters,1980,50(1):139-155.
41 李曙光. εNd-La/Nb、Ba/Nb、Nb/Th图对地幔不均一性研究的意义──岛弧火山岩分类及EMII端元的分解[J].地球化学,1995,23(2):105-114.
Li Shuguang . Implications of εNd-La/Nb,Ba/Nb,Nb/Th diagrams to mantle heterogeneity-classification of island arc basalts and decomposition of EMII component[J].Geochimica,1995,23(2):105-114.
42 陈登辉,伍跃中,李文明,等. 西昆仑塔什库尔干地区磁铁矿矿床特征及其成因[J].大地构造与成矿学,2013,37(4):671-684.
Chen Denghui , Wu Yuezhong , Li Wenming ,et al. Geological characteristics and genesis of the iron deposits in the Taxkorgan area,west Kunlun[J].Geotectonica et Metallogenia,2013,37(4):671-684.
43 李万亨,杨昌明. 冀东滦县地区前震旦纪海底火山沉积变质铁矿的古构造及地球化学环境[J].地球科学,1983(3),117-126.
Li Wanheng , Yang Changming . Palaeotectonic and geochemical environment of Precambrian submarine volcanic sedimentary metamorphic iron ore in Luanxian of the eastern Hebei Province[J].Earth Science,1983(3):117-126.
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[3] 赵瑞荣, 王汉波. 灰色理论在铁矿石需求预测中的应用[J]. J4, 1999, 7(4~5): 18-21.
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