Trace Elements in Sphalerite from the Dadongla Zn-Pb Deposit, Western Hunan-Eastern Guizhou Zn-Pb Metallogenic Belt, South China

作     者：HU Yusi YE Lin WEI Chen LI Zhenli HUANG Zhilong WANG Haoyu HU Yusi;YE Lin;WEI Chen;LI Zhenli;HUANG Zhilong;WANG Haoyu

作者机构：State Key Laboratory of Ore Deposit GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2020年第94卷第6期

页      面：2152-2164页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the National Natural Science Foundation of China(41673056 and U1812402) the Key Program of Guizhou Natural Science Foundation(Qiankehejichu1421) the State Key Program of National Natural Science Foundation of China(41430315) National Key R&D Program of China(2017YFC0602500) 

主　　题：trace elements sphalerite LA-ICPMS MVT deposit Western Hunan-Eastern Guizhou Zn-Pb metallogenic belt 

摘      要：The western Hunan-eastern Guizhou Zn-Pb metallogenic belt is one of the important Zn-Pb mineralization regions in *** Dadongla deposit,located in the northeast of Guizhou Province,is one of the typical Zn-Pb deposits in the region and has estimated resources more than 12 million metric tons(Mt)with an average grade of 4.11 wt%Zn+*** orebodies are hosted in the lower Cambrian Aoxi Formation dolomite,occurring as bedded,para-bedded in shape,and in conformity with the wall *** ore mineral assemblage is simple,dominated by sphalerite with minor pyrite and galena,and the gangue minerals are composed of dolomite,calcite with minor bitumen and *** view of the lack of geological and geochemical researches,the genesis of Zn-Pb ore is still *** ablation-inductively coupled plasma mass spectrometry(LA-ICPMS)spot and mapping analyses were used to obtain sphalerite trace element chemistry in the Dadongla Zn-Pb deposit in Guizhou,China,aiming to constrain its ore *** results show that sphalerite is characterized by the enrichment of Cd,Fe,Ge and Hg,corresponding with that of typical MVT *** zones were identified in the sphalerite crystal from Dadongla from the center to margin according to the color *** which the zone in the center,representing the early ore-stage sphalerite,is characterized by enrichment of Cd relatively,while the zone forming at late ore-stage is enriched in Ge and Hg *** finding was controlled by differential leached metals content in ore-forming fluid from its source ***,critical element Ge trends to be enriched at the late ore-stage and follows a substitution of 2 Zn^2+(?)Ge^4++□(vacancy).Moreover,the calculated ore-forming temperature ranges from 79.9℃to 177.6℃by the empirical formula,which is similar to that of typical Mississippi Valley-type(MVT)*** with the features of trace elements in sphalerite from different types of deposits,together with the geology,the Dadongla