气候变化领域集成服务门户(CCPortal): Geochronology, geochemistry and geological significance of volcanic rocks in the Jiega Formation, western Lhasa block, Sailipu, Tibet [西藏拉萨地块西部赛利普地区捷嘎组火山岩的年代学,地球化学及地质意义]

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DOI	10.13745/j.esf.sf.2019.3.9
	Geochronology, geochemistry and geological significance of volcanic rocks in the Jiega Formation, western Lhasa block, Sailipu, Tibet [西藏拉萨地块西部赛利普地区捷嘎组火山岩的年代学,地球化学及地质意义]
	Wei T.; Kang Z.; Yang F.; Ran M.; Li Q.; Wei N.; Liu D.; Cao Y.; Chen H.; Li D.
发表日期	2019
ISSN	10052321
卷号	26 期号:2
英文摘要	Mesozoic magmatic rocks are widely distributed in the Lhasa terrane, and the understanding of their petrogenesis and geodynamic setting may yield important information on the pre-Cenozoic geohistory of the Tibetan Plateau. In this paper, we carried out studies for the first time on the system zircon geochronology and major and trace elemental geochemistry of the Jiega Formation in the Sailipu area in western Lhasa block. The results show that the Jiega Formation has mainly andesite, basalt-andesite and basalt belonging to medium potassium calc alkaline series and is aged at 108.5±1.0 Ma by accurate LA-ICP-MS U-Pb dating. It is enriched in LILE Rb, Th, U and depleted in HFSE Nb, Ta, Ti, typical of island arc volcano rock. The REE patterns revealed enrichment of LREE with some flatness and weak negative Eu anomaly, indicating some low level magmatic differentiation. We conclude that the Jiega Formation volcano rocks were probably formed by partial melting of the metasomatic lithospheric mantle induced by upwelling of asthenosphere from the rotation of subducted slabs under the tectonic setting of the Bangong Lake-Nu River southward subduction of the Neo-Tethys. © 2019, Editorial Office of Earth Science Frontiers. All right reserved.
英文关键词	Island arc volcanic rocks;Jiega Formation;Lhasa block;Sailipu;Tibet;Zircon LA-ICP-MS U-Pb dating
语种	英语
来源期刊	Earth Science Frontiers
来源机构	中国科学院西北资源环境生态研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89574
作者单位	(1)College of Earth Sciences, Guilin University of Technology, Guilin, 541004, China;(2)Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Guilin, 541004, China
推荐引用方式 GB/T 7714	Wei T.,Kang Z.,Yang F.,等. Geochronology, geochemistry and geological significance of volcanic rocks in the Jiega Formation, western Lhasa block, Sailipu, Tibet [西藏拉萨地块西部赛利普地区捷嘎组火山岩的年代学,地球化学及地质意义][J]. 中国科学院西北资源环境生态研究院,2019,26(2).
APA	Wei T..,Kang Z..,Yang F..,Ran M..,Li Q..,...&Li D..(2019).Geochronology, geochemistry and geological significance of volcanic rocks in the Jiega Formation, western Lhasa block, Sailipu, Tibet [西藏拉萨地块西部赛利普地区捷嘎组火山岩的年代学,地球化学及地质意义].Earth Science Frontiers,26(2).
MLA	Wei T.,et al."Geochronology, geochemistry and geological significance of volcanic rocks in the Jiega Formation, western Lhasa block, Sailipu, Tibet [西藏拉萨地块西部赛利普地区捷嘎组火山岩的年代学,地球化学及地质意义]".Earth Science Frontiers 26.2(2019).