岩石矿物学杂志2025，Vol.44Issue(4)：949-964,16.DOI:10.20086/j.cnki.yskw.2025.4103
四川李家沟锂辉石矿床Ⅰ号脉成因
Genesis of No.Ⅰ pegmatite vein in Lijiagou spodumene deposit,Sichuan:Evidence from spatial distribution characteristics of rare elements and in situ crystallization simulation
摘要
Abstract
In order to find out the distribution characteristics of rare elements,the genesis of pegmatite and deep prospecting potential of Lijiagou spodumene deposit in Jinchuan County,Sichuan Province,statistical analysis of rare elements from ore-bearing pegmatite,barren pegmatite and wall rock in exploration trenches and drill holes on No.2,5,9 and 11 from exploration lines from east to west in the largest No.Ⅰ vein of Lijiagou spodumene deposit,and in situ crystallization simulation calculation was conducted on the Ke'eryin two-mica granite and the ore-bearing pegmatite of No.Ⅰ vein.The analysis results show that the main rare element in No.Ⅰ vein is Li,accompanied with Be,Rb,Sn,Nb and Ta,which have similar characteristics to the rare element in the Jiajika X03 vein.The metallogenetic elements distribution regularity of the No.Ⅰ vein from top to bottom is that Li is enriched in the up-per part,Be is enriched in the middle part,Nb and Rb are enriched in the lower part,while Nb and Rb in the Jia-jika X03 vein are relatively enriched in the upper part of the ore body.The in situ crystallization simulation calcula-tion indicated that the No.Ⅰ vein of Lijiagou was not formed by crystallization differentiation of a set of magma sys-tems that formed Ke'eryin two-mica granite.The petrogenesis mechanism of the pegmatite of Lijiagou spodumene deposit may be that the first step is the low degree partial melting of the metamorphic sedimentary rock to generate relatively Li rich melt,followed by further enrichment of the melt through crystallization differentiation to form Li saturated melt,and finally crystallization to form spodumene pegmatite.关键词
锂辉石矿床/Ⅰ号脉/稀有元素/空间分布特征/原位结晶模拟/李家沟Key words
spodumene deposit/No.Ⅰ vein/rare element/spatial distribution characteristics/in situ crystallization simulation/Lijiagou分类
天文与地球科学引用本文复制引用
罗小龙,马志平,赵恒兵,席世强,谭华,费光春,蔡云华,李佑国,袁彦伟,刘榆,李云强..四川李家沟锂辉石矿床Ⅰ号脉成因[J].岩石矿物学杂志,2025,44(4):949-964,16.基金项目
国家自然科学基金项目(41702074) （41702074）
四川省科技厅项目(25JBGOV0001) （25JBGOV0001）
四川省地质调查研究院科研项目(SCLGS-CZDXM-2024001) （SCLGS-CZDXM-2024001）
四川省政府投资地质勘查项目(DZ202414) National Natural Science Foundation of China(41702074) （DZ202414）
Science and Technology Department of Sichuan Province(25JBGOV0001) （25JBGOV0001）
Research project of Sichuan Institute of Geological Survey(SCLGS-CZDXM-2024001) （SCLGS-CZDXM-2024001）
The Geological Exploration Project Invested by the Sichuan Provincial Government(DZ202414) （DZ202414）
