In-situ analysis and genetic investigation of Li-bearing minerals in McDermitt clay-type lithium deposit,Nevada,USA

作     者：Yi Cui Hanjie Wen Zhengbing Zhou Kunyue Ling Lin Xu Shirong Liu Fei Xu Yi Cui;Hanjie Wen;Zhengbing Zhou;Kunyue Ling;Lin Xu;Shirong Liu;Fei Xu

作者机构：School of Earth SciencesEast China University of TechnologyNanchang 330013China State Key Laboratory of Nuclear Resources and EnvironmentEast China University of TechnologyNanchang 330013China School of Earth Sciences and ResourcesChang’an UniversityXi’an 710054China College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Ore Deposit GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550081China State Key Laboratory of Environmental GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550081China 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2024年第43卷第3期

页      面：478-488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：This work was financially supported by the National Natural Science Foundation of China(Grant Nos.92162214,41773015,and U1812402) the Key Research and Development Program of Yunnan Province(202103AQ100003) 

主　　题：McDermitt caldera Lithium occurrence Tuffaceous sediments Mineralogy Hectorite neoformation 

摘      要：Clay-type Li deposits are poised to play a pivotal role in addressing the surging global demand for *** McDermitt clay-type Li deposit,located in Nevada,is the largest Li deposit in the United States,with Li hosted by a clay-rich sequence of smectite-dominated intervals and illite-dominated intervals,***,the occurrence of Li and the genesis of Li-bearing minerals within smectite-dominated intervals have not been thoroughly investigated in previous ***,we studied the mineralogy,the in-situ Li distribution,and the bonding environments of Li within the smectite intervals using a combination of instru-mental techniques including scanning electron microscope,transmission electron microscope,time-of-flight secondary ion mass spectrometry,and nuclear magnetic *** results indicate that the smectite exhibits low crystallinity characteristics of lacustrine clay authigenesis and is com-monly found tofill the interstices among volcanic minerals or envelop them;Li is mainly hosted by Mg-smectite rather than the volcanic *** the tuffaceous sediment samples,the volcanic glass has undergone a transformation,resulting in its complete disappearance and alteration into clay *** to the octahedral sites of Mg-smectite bounded in Li,it is referred to be *** interpret that the hectorite’s precipitation occurs in a high saline-alkaline water environment,a result of McDermitt *** conclusion can be supported by the coexistence of spherulitic calcite and ***,this study confirms hectorite as the main Li-bearing mineral and increases the understanding of the genetic model of hectorite formation in intracontinental caldera basins.