摘要
1.Objective The western Kunlun in Xinjiang is located on the northwestern margin of the Qinghai-Tibet Plateau.In terms of geotectonic location,it lies in the western segment of the Central Orogenic Belt and on the southwestern edge of the Tarim Block(Fig.1a),thus featuring special tectonic position and favorable metallogenic conditions.In recent years,great progress has been made in the geological prospecting of the pegmatite-type rare metal deposits in this area(Wang DH et al.,2020).In detail,many rare metal deposits have been discovered in this area,such as the Dahongliutan lithium deposit(Figs.1b,1c),Akshay lithium deposit,509 Daobanxi lithium deposit,and Huangcaogou lithium deposit,which rank as super-large deposits according to their predicted resources.Furthermore,their metallogenic geological characteristics have been presently researched,achieving many results.However,the understanding of their metallogenic epochs is yet to be deepened,with no clear chronological data available.This paper aims to determine the crystallization age of the rare metal-bearing granitic pegmatite in the Dahongliutan lithium deposit by zircon U-Pb dating,in order to provide new information for the research into the tectonic evolution of the western Kunlun-Karakoram and the relationship between diagenesis and mineralization in this area.
基金
supported by the Natural Science Foundation of Shaanxi Province(2020JM-311)
the project of the National Sci-Tech Support Plan of China(2011BAB06B05-02)
the National Natural Science Foundation of China(41302051).
