IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Li and B isotopic fingerprint of Archean subduction
Wang, Dan1,2,3; Romer, Rolf L.2; Guo, Jing-hui3,4; Glodny, Johannes2
2020
Source PublicationGEOCHIMICA ET COSMOCHIMICA ACTA
ISSN0016-7037
Volume268Pages:446-466
AbstractArchean peridotite xenoliths in the similar to 2.52 Ga Zhulagou diorite (Yinshan Block, North China Craton) show chemical and Li isotopic evidence for metasomatism above an ancient subduction zone. The peridotite xenoliths are composed of olivine + orthopyroxene + amphibole + phlogopite + serpentine. The peridotite xenoliths have low whole-rock Mg# (80-81) and low Mg# (81-84) in olivine, indicating that they are cumulates that formed near the crust-mantle boundary. Petrological observations, mineral trace element data and isotopic ages show that the sequence of hydrous minerals is amphibole-serpen tine-phlogopite. SIMS U-Pb dating of zircon from peridotites yielded an upper intercept age at similar to 2.53 Ga, and a U-Pb lower intercept age at similar to 1.8 Ga. The age of similar to 2.53 Ga is interpreted to date the crystallization of zircon from the metasomatized mantle melt that formed the Zhulagou cumulate peridotite. Rb-Sr mineral isochrons date phlogopite formation at similar to 1760 Ma, consistent with the lower intercept age of zircon. Pargasitic amphibole from the Zhulagou peridotites has fractionated REE, pronounced depletions of Nb, Ta, Zr and Ti, and heavy delta(7) Li (similar to+14 parts per thousand) and light delta B-11 (similar to 11 parts per thousand). Combined with slightly depleted mantle whole rock epsilon(Nd) (similar to+1.3) and high zircon delta O-18 (+5.6 to +7.0 parts per thousand), the amphibole composition reflects that the peridotite xenoliths formed from melts that carried the geochemical and isotopic fingerprint typical for a metasomatized mantle wedge above a subduction zone. The Zhulagou peridotite xenoliths have the highest delta Li-7 values (similar to+12 parts per thousand) recorded in Archean peridotites. Isotopically heavy Li and light B in olivine, orthopyroxene, and amphibole from the peridotite xenoliths show that Li and B may decouple during partial melting or fluid release from the subducted slab. The decoupling of Li and B may have a variety of reasons, including different host minerals for Li and B in the source and different protoliths in the subducted slab. The Li and B isotopic record on the recycling of ancient material demonstrates that modern-style subduction operated already in the late Archean. (C) 2019 Elsevier Ltd. All rights reserved.
KeywordLithium and boron isotopes Archean subduction Metasomatism Peridotite xenolith Oceanic crust
DOI10.1016/j.gca.2019.10.021
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship
WOS KeywordNORTH CHINA CRATON ; LITHOSPHERIC MANTLE BENEATH ; PERIDOTITE XENOLITHS ; CONTINENTAL-CRUST ; TRACE-ELEMENTS ; YINSHAN BLOCK ; OCEANIC-CRUST ; U-PB ; BORON ISOTOPES ; CHEMICAL DIFFUSION
Language英语
Funding ProjectNational Natural Science Foundation of China[41702201] ; National Natural Science Foundation of China[41890834] ; National Natural Science Foundation of China[41972203] ; Sino-German (CSC-DAAD) Postdoc Scholarship[57251553]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship ; Sino-German (CSC-DAAD) Postdoc Scholarship
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000500923500024
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95808
Collection岩石圈演化国家重点实验室
Corresponding AuthorWang, Dan
Affiliation1.Chinese Acad Geol Sci, Inst Geol, Key Lab Deep Earth Dynam, Minist Nat Resources, Beijing 100037, Peoples R China
2.GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Coll Earth Sci, Grad Sch, Beijing 100029, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Wang, Dan,Romer, Rolf L.,Guo, Jing-hui,et al. Li and B isotopic fingerprint of Archean subduction[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2020,268:446-466.
APA Wang, Dan,Romer, Rolf L.,Guo, Jing-hui,&Glodny, Johannes.(2020).Li and B isotopic fingerprint of Archean subduction.GEOCHIMICA ET COSMOCHIMICA ACTA,268,446-466.
MLA Wang, Dan,et al."Li and B isotopic fingerprint of Archean subduction".GEOCHIMICA ET COSMOCHIMICA ACTA 268(2020):446-466.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Dan]'s Articles
[Romer, Rolf L.]'s Articles
[Guo, Jing-hui]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Dan]'s Articles
[Romer, Rolf L.]'s Articles
[Guo, Jing-hui]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Dan]'s Articles
[Romer, Rolf L.]'s Articles
[Guo, Jing-hui]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.