中国地质2025，Vol.52Issue(6)：1915-1929,15.DOI:10.12029/gc20230314001
西昆仑东段印支期岩浆活动与锂铍稀有金属成矿关系及找矿前景分析
Relationship between Indosinian magmatic activity and Li-Be-rare metal mineralization in the eastern section of West Kunlun and its implications for prospecting
摘要
Abstract
This paper is the result of mineral exploration engineering. [Objective]This paper aims to investigate the relationship between the Li-Be-rare-metal mineralization and Indosinian magmatism in the eastern part of the West Kunlun Orogenic Belt through a comprehensive study of Indosinian magmatic activities and geochronology and geochemistry of granitic pegmatites.Furthermore,the relevant metallogenic regularity is summarized and the prospecting direction for rare metals is proposed.[Methods]The geological background of the eastern part of the West Kunlun Orogenic Belt and the geological and geochemical characteristics of Indosinian magmas including their ages,lithological assemblages,whole-rock geochemistry,and isotopic characteristics(Hf,Nd,and Li,etc.)are summarized.The genetic link between the pegmatite-hosted Li-Be-raremetal mineralization and Indosinian magmatism is investigated.[Results]The large-sized Indosinian Dahongliutan composite granite pluton in the eastern part of the West Kunlun Orogenic Belt which is mainly composed of quartz diorite,biotite monzogranite,and two-mica monzogranite(including garnet,tourmaline-bearing two-mica monzogranite)was derived from partial melting of the crust in a post-collision regime and controls the distribution of the granitic pegmatites.The chronological data,whole-rock geochemistry,and Nd-Hf isotope geochemistry suggest that the quartz diorite,biotite monzogranite,and two-mica monzogranite were likely derived from different magmas.In addition,the geochemical characteristics of minerals(such as garnet and tourmaline)and Li isotopes indicate that the two-mica monzogranite(garnet tourmaline two-mica monzogranite),garnet-bearing tourmaline muscovite granite pegmatite and spodumene-albite pegmatite were likely derived from the same magma source.[Conclusions]The two-mica monzogranite,in particular garnet,tourmaline bearing two-mica monzogranite exhibit close relationship with the pegmatite-type rare metal deposits.The peripheries of Aktas and the 509 Daoban-Quanshuigou area are favorable locations for lithium-rich pegmatite prospecting.关键词
锂铍稀有金属矿床/印支期岩浆活动/伟晶岩/成矿关系/找矿方向/矿产勘查工程/西昆仑东段Key words
Li-Be-rare metal deposit/Indosinian magmatic activity/pegmatite/mineralization/prospecting target/mineral exploration engineering/the eastern section of West Kunlun分类
天文与地球科学引用本文复制引用
高景刚,梁婷,凤永刚,谭细娟,刘艳荣,李永,赵如意,周斌,张建新..西昆仑东段印支期岩浆活动与锂铍稀有金属成矿关系及找矿前景分析[J].中国地质,2025,52(6):1915-1929,15.基金项目
国家重点研发计划课题(2021YFC2901902)和中国地质调查局项目(DD20190379-53)联合资助. Supported by the National Key Research and Development Program of China(No.2021YFC2901902)and the project of China Geological Survey(No.DD20190379-53). （2021YFC2901902）
