IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Distinct formation history for deep-mantle domains reflected in geochemical differences
Doucet, Luc S.1; Li, Zheng-Xiang1; Gamal El Dien, Hamed1,2; Pourteau, Amaury1; Murphy, J. Brendan1,3; Collins, William J.1; Mattielli, Nadine4; Olierook, Hugo K. H.5,6; Spencer, Christopher J.1,7; Mitchell, Ross N.1,8
2020-07-01
Source PublicationNATURE GEOSCIENCE
ISSN1752-0894
Volume13Issue:7Pages:511-+
AbstractThe Earth's mantle is currently divided into the African and Pacific domains, separated by the circum-Pacific subduction girdle, and each domain features a large low shear-wave velocity province (LLSVP) in the lower mantle. However, it remains controversial as to whether the LLSVPs have been stationary through time or dynamic, changing in response to changes in global subduction geometry. Here we compile radiogenic isotope data on plume-induced basalts from ocean islands and oceanic plateaus above the two LLSVPs that show distinct lead, neodymium and strontium isotopic compositions for the two mantle domains. The African domain shows enrichment by subducted continental material during the assembly and breakup of the supercontinent Pangaea, whereas no such feature is found in the Pacific domain. This deep-mantle geochemical dichotomy reflects the different evolutionary histories of the two domains during the Rodinia and Pangaea supercontinent cycles and thus supports a dynamic relationship between plate tectonics and deep-mantle structures. Earth's deep-mantle domains are geochemically distinct. The African domain is enriched in subducted material, which suggests a different history from the Pacific domain and a dynamic relationship between plate tectonics and deep-mantle structures.
DOI10.1038/s41561-020-0599-9
WOS KeywordLARGE IGNEOUS PROVINCES ; HELIUM-ISOTOPES ; CONTINENTAL BREAKUP ; HE-3/HE-4 RATIOS ; VOLCANIC-ROCKS ; PLUME ; ORIGIN ; SHEAR ; SR ; EVOLUTION
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000544997400013
PublisherNATURE PUBLISHING GROUP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/97144
Collection岩石圈演化国家重点实验室
Corresponding AuthorDoucet, Luc S.
Affiliation1.Curtin Univ, Sch Earth & Planetary Sci, Earth Dynam Res Grp, TIGeR, Perth, WA, Australia
2.Tanta Univ, Geol Dept, Fac Sci, Tanta, Egypt
3.St Francis Xavier Univ, Dept Earth Sci, Antigonish, NS, Canada
4.Univ Libre Bruxelles, Lab G Time, ULB, Brussels, Belgium
5.Curtin Univ, Ctr Explorat Targeting Curtin Node, Timescales Mineral Syst, Perth, WA, Australia
6.Curtin Univ, John Laeter Ctr, Perth, WA, Australia
7.Queens Univ, Dept Geol Sci & Geol Engn, Kingston, ON, Canada
8.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Doucet, Luc S.,Li, Zheng-Xiang,Gamal El Dien, Hamed,et al. Distinct formation history for deep-mantle domains reflected in geochemical differences[J]. NATURE GEOSCIENCE,2020,13(7):511-+.
APA Doucet, Luc S..,Li, Zheng-Xiang.,Gamal El Dien, Hamed.,Pourteau, Amaury.,Murphy, J. Brendan.,...&Mitchell, Ross N..(2020).Distinct formation history for deep-mantle domains reflected in geochemical differences.NATURE GEOSCIENCE,13(7),511-+.
MLA Doucet, Luc S.,et al."Distinct formation history for deep-mantle domains reflected in geochemical differences".NATURE GEOSCIENCE 13.7(2020):511-+.
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