喀喇昆仑林济塘盆地铅锌矿床容矿地层的海相沉积环境:源于侏罗系灰岩微量元素和石膏硫同位素的约束  

Ore-Bearing Strata of Lead-Zinc Deposits in the Linjitang Basin of Karakorum in a Marine Sedimentary Environment:Constraints from Trace Elements in Limestone and Sulfur Isotope of Gypsum in Jurassic

作　　者：唐俊林 李昊[2] 谭克彬 柯强[2] 董连慧 徐兴旺[2] 哈依热提[3] TANG Junlin;LI Hao;TAN Kebin;KE Qiang;DONG Lianhui;XU Xingwang;HA Yireti(School of Earth and Mineral Resources,China University of Geosciences,Beijing 100083;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;The Sixth Geological Brigade,Xinjiang Bureau of Geological and Mineral Exploration and Development,Hami,Xinjiang 839000;Xinjiang Bureau of Geology and Mineral Exploration and Development,Urumqi,Xinjiang 830000)

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中国科学院地质与地球物理研究所,北京100029 [3]新疆维吾尔自治区地质矿产勘查开发局第六地质大队,新疆哈密839000 [4]新疆维吾尔自治区地质矿产勘查开发局,新疆乌鲁木齐830000

出　　处：《地质与勘探》2020年第6期1134-1144,共11页Geology and Exploration

基　　金：国家自然科学基金项目(编号:41672088)资助。

摘　　要：近年来,喀喇昆仑地区林济塘中生代沉积盆地内发现了火烧云超大型铅锌矿等众多铅锌矿床,以往对该地区的沉积环境以及其成矿相关性缺乏详细探讨。本文开展了林济塘盆地内侏罗系灰岩微量元素和石膏硫同位素分析,以揭示铅锌矿床容矿地层的沉积环境及其与成矿的相关性。研究发现,盆地内侏罗系灰岩中Ba、V、Ni、Cu、Co、Th、Co、Sr元素及比值特征显示其形成于海相,石膏硫同位素δ34 S值为14.89‰~20.63‰,与同期海水相一致。研究结果表明该盆地内铅锌矿床的容矿地层形成于干热气候条件下的海相沉积氧化环境。In recent years,a number of Pb-Zn deposits have been discovered in the Linjitang Mesozoic sedimentary basin of the Karakorum area,including the Huoshaoyun super-large Pb-Zn deposit.So far there is no detailed study on the sedimentary environment and metallogenic relevance for this area.This work analysed trace elements in Jurassic limestone and sulfur isotopes of Jurassic gypsum to clarify the sedimentary environment of the ore-bearing strata and metallogenic relevance.Results suggest that the elements Ba,V,Ni,Cu,Co,Th,Co and Sr and their ratios show that the limestone in this area formed in a marine environment.And theδ34 S value of the gypsum sulfur isotope is between 14.89‰and 20.63‰,consistent with that of seawater in the same period.These results indicate that the ore-bearing strata of lead-zinc deposits in the Linjitang Basin of Karakorum formed in a sedimentary environment of oxidized marine facies under dry-hot climate.

关 键 词：灰岩 石膏 微量元素 硫同位素 海相沉积 林济塘盆地 喀喇昆仑 

分 类 号：P595[天文地球—地球化学]