甲玛铜多金属矿床S、Pb同位素组成及地质意义

金属矿山 ›› 2012, Vol. 41 ›› Issue (06): 102-105.

甲玛铜多金属矿床S、Pb同位素组成及地质意义

周云^1,2，唐菊兴³，秦志鹏¹，彭慧娟³

1.成都理工大学地球科学学院；2.中国地质调查局武汉地质调查中心；3.中国地质科学院矿产资源研究所

出版日期:2012-06-15 发布日期:2012-06-29
基金资助:
* 国家973项目(编号：2011CB403103),中央公益性行业科研专项课题(编号：200911007-02),科技部行业专项协作研究项目(编号：200911007-12)。

Sulfur and Lead Isotope Compositions and Their Geological Implications of the Jiama Copper Polymetallic Deposit

Zhou Yun^1,2，Tang Juxing³，Qin Zhipeng¹，Peng Huijuan³

1.College of Earth Science，Chengdu University of Technology；2.Wuhan Center of China Geological Survey；3. Institute of Mineral Resources，Chinese Academy of Geological Sciences

Online:2012-06-15 Published:2012-06-29

摘要/Abstract

摘要： 通过对甲玛铜多金属矿床矿石矿物和斑岩S、Pb同位素组成的研究，表明两者S同位素和Pb同位素组成比较一致，变化幅度较小，S同位素基本达到了平衡，显示出岩浆硫组成特点，无论是岩石铅还是矿石铅应具有相同的起源与演化历史，在铅构造模式图上均位于造山带铅演化曲线上。甲玛矿床铜多金属矿床成矿物质主要来自深源岩浆，岩浆和成矿物质起源于参与造山带的下地壳，具有幔源成分的混染。

关键词: S同位素, Pb同位素, 铜多金属矿床, 西藏甲玛

Abstract: The study of S and Pb isotopic data for the bearing-copper porphyries and metals in Jiama copper polymetallic deposit，show that the S isotope and Pb isotope compositions from ore minerals are similar to those from porphyries，and vary slightly. The sulfur isotope fractionation in the ore fluid almost reaches the equilibrium，showing the typical signature of mantle S. The uniform Pb isotope compositions for the deposit imply that the Pb isotopes may have the same origin and similar developing history. The Pb isotopes are plotted mostly between the mantle and orogenic belt evolution curves in the plumbotectonic framework diagram. The ore-forming materials in Jiama copper polymetallic deposit were mainly from magma. The ore-forming porphyry was formed due to upper-crust under the orogene，and the input of enriched mantle components.

Key words: Sulfur isotope, Lead isotope, Copper polymetallic deposit, Tibet Jiama

周云, 唐菊兴, 秦志鹏, 彭慧娟. 甲玛铜多金属矿床S、Pb同位素组成及地质意义[J]. 金属矿山, 2012, 41(06): 102-105.

ZHOU Yun, TANG Ju-Xing, QIN Zhi-Peng, PENG Hui-Juan. Sulfur and Lead Isotope Compositions and Their Geological Implications of the Jiama Copper Polymetallic Deposit[J]. Metal Mine, 2012, 41(06): 102-105.

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