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现代地质 ›› 2010, Vol. 24 ›› Issue (5): 856-865.

• 同位素地球化学与矿床 • 上一篇    下一篇

南天山沙里塔什铅锌矿床地质特征及S、Pb同位素特征研究

张舒1,2,张招崇1,黄河1,张东阳1,薛春纪1   

  1. 1.地质过程与矿产资源国家重点实验室, 中国地质大学.地球科学与资源学院,北京100083;
    2. 安徽省地质调查院,安徽.合肥230001
  • 出版日期:2010-09-24 发布日期:2012-03-28
  • 通讯作者: 张招崇,男,教授,博士生导师,1965年出生,矿物学、岩石学、矿床学专业,主要从事火成岩石学和金属矿床的研究。
  • 作者简介:张舒,男,硕士研究生,1986年出生,矿产普查与勘探专业,主要从事火成岩石学和金属矿床的研究。 Email:zs1638610@163com。
  • 基金资助:

    国家科技支撑项目(2007BAB25B05);国家自然科学基金项目(40925006)。

Geologic Characteristics, Sulfur and Lead Isotope Study of the Shalitashi Lead-zinc Deposit, Southern Tianshan

 ZHANG  Shu1,2, ZHANG  ZHao-Chong1, HUANG  He1, ZHANG  Dong-Yang1, XUE  Chun-Ji1   

  1. 1.State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources,China University of Geosciences, Beijing100083, China; 2.Geological Survey of Anhui Province, Hefei,Anhui230001,China
  • Online:2010-09-24 Published:2012-03-28

摘要:

沙里塔什铅锌矿床是新疆南天山多金属成矿带内重要的铅锌矿床。矿床位于南天山造山带迈丹—阔克萨勒古生代陆缘盆地,含矿层位为中泥盆世托格买提组,单个矿体呈透镜状、巢状和筒状分布在白云岩构造破碎带内,围岩蚀变较弱。矿石中金属矿物以闪锌矿、方铅矿为主。矿石金属硫化物的δ34S=-3.6‰~-12.0‰,指示硫主要来自海相硫酸盐的还原作用。矿石金属硫化物的206Pb/204Pb比值范围为17.8979~17.9625,207Pb/204Pb为15.5981~15.6023,208Pb/204Pb为38.1863~38.1971,结合矿石、围岩的微量及稀土元素特征判断,铅主要来自古生代沉积盆地高金属背景值的中泥盆世托格买提组。综合沙里塔什铅锌矿床的地质、地球化学特征,判定其为MVT型铅锌矿床。

关键词: 沙里塔什, 南天山造山带, 铅锌矿床, 矿床地质, 地球化学, S、Pb同位素

Abstract:

 The Shalitashi lead-zinc deposit located in Xinjiang Uygur Autonomous Region, NW China is an important lead-zinc deposit in the southern Tianshan polymetallic metallogenic belt. The deposit occurs in the Paleozoic Maidan-Kuokeshale basin as lens, nested and tubular orebodies within the structure fracture zone in the dolomite of the middle Devonian Tuogemaiti Formation. The alteration is weakly developed in the wall rocks. The dominant sulfide minerals in the ore are sphalerite and galena. The ore structures include open-space filling and host-rock replacement. The δ34S values for the sulfide minerals range from -3.6‰ to -12.0‰ which indicates that the reduced sulfur is derived from the seawater sulfate. The 206Pb/204Pb values for sulfides range from 17.8979 to 17.9625,207Pb/204Pb from 15.5981 to 15.6023,208Pb/204Pb from 31.1863 to 38.1971, which implies that the metals were derived from the sediments with high metal contents in the Paleozoic basin. On the basis of the geology and geochemistry characteristics, the Shalitashi leadzinc deposit can be classified into Mississippi valley-type lead-zinc deposit.

Key words: Shalitashi, southern Tianshan orogeny belt, lead-zinc ore deposit, deposit geology, geochemistry, sulfur and lead isotope

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