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Geochronology, source features and the characteristics of fractional crystallization in pegmatite at the Qongjiagang giant pegmatite -type lithium deposit, Himalaya, Tibet
Zhao JunXing1; He ChangTong1,2; Qin KeZhang1,2; Shi RuiZhe1,2; Liu XiaoChi3; Hu FangYang1; Yu KeLong1,2; Sun ZhengHao1,2
2021-11-01
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume37Issue:11Pages:3325-3347
AbstractRecently, the Himalayan leucogranite belt has been recognized as the potential prospecting area of the rare -metal mineralization related to the newly proposed petrogenesis of highly fractionated granite. Currently, the exploration aim is mainly targeting at the beryllium -niobium -tantalum ( tin -tungsten) assemblage, such as Cuonadong deposit. Qin et al. ( 2021a) reported a discovery of the Qongjiagang giant lithium pegmatite deposit in Himalaya, Tibet, raising more attention to the spodumene pegmatites in the Higher Himalaya Belt. The present work reveals the geological features, age of ore formation and source features of mineralizing pegmatites at Qongjiagang. Our result shows the main ore minerals at Qongjiagang are dominated by spodumene and columbite group minerals, with minor amounts of cassiterite and beryl. The pegmatite zones hosted by a majority of spodumene minerals at Qongjiagang are identified as a massive microcline + spodumene zone and a layered aplite zone. The K/Rb ratios of different rocks in the internal zonation patterns from rim to core remain to be similar, and the lithium concentrations rise from 100 x 10 6 at the saccharoidal albite zone, through 1000 x 10 -6 at the layered aplite zone, to more than 3000 x 10 -6 at the massive microcline + spodumene zone; however, the cesium contents drop, respectively. U-Pb dating results upon monazite and columbite group minerals show the Qongjiagang Li -pegmatite was formed in the initial duration of the Neo-Himalayan stage (25 24Ma), similar to most dating results at the Higher Himalayan leucogranite. Mineral chemistry and monazite Nd isotopic compositions suggest Qongjiagang Li -pegmatite was crystallized in a highly evolved granitic pegmatite melt, with source features consistent with the Higher Himalayan Crystalline. Our research at the geological features, formation age and source characteristics at Qongjiagang lithium pegmatite deposit gives more implication of ore -forming mechanism and exploration targeting for finding large granitic pegmatitic lithium mines in the Higher Himalaya region of China.
KeywordQongjiagang lithium deposit Internal zonation patterns of pegmatite U-Pb dating of monazite and columbite group minerals Source features Regional mineralization in the Himalayan leucogranite belt
DOI10.18654/1000-0569/2021.11.06
WOS KeywordGRANITIC PEGMATITES ; COLUMBITE-TANTALITE ; TRACE-ELEMENTS ; CONSTRAINTS ; MINERALIZATION ; SOLUBILITY ; MINERALOGY ; ORIGIN ; MAINE ; ROCKS
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000747486100006
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104920
Collection矿产资源研究院重点实验室
岩石圈演化国家重点实验室
Corresponding AuthorZhao JunXing
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
First Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao JunXing,He ChangTong,Qin KeZhang,et al. Geochronology, source features and the characteristics of fractional crystallization in pegmatite at the Qongjiagang giant pegmatite -type lithium deposit, Himalaya, Tibet[J]. ACTA PETROLOGICA SINICA,2021,37(11):3325-3347.
APA Zhao JunXing.,He ChangTong.,Qin KeZhang.,Shi RuiZhe.,Liu XiaoChi.,...&Sun ZhengHao.(2021).Geochronology, source features and the characteristics of fractional crystallization in pegmatite at the Qongjiagang giant pegmatite -type lithium deposit, Himalaya, Tibet.ACTA PETROLOGICA SINICA,37(11),3325-3347.
MLA Zhao JunXing,et al."Geochronology, source features and the characteristics of fractional crystallization in pegmatite at the Qongjiagang giant pegmatite -type lithium deposit, Himalaya, Tibet".ACTA PETROLOGICA SINICA 37.11(2021):3325-3347.
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