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Tectonic controls on the isotopic juvenility of mid-Cretaceous continental arcs: Global compilations and implications for chemical weathering

Cao, Wenrong1; Bataille, Clement P.2; Leuchter, Ethan R.1; Zhou, Xiqiang3,4
2022-06-01
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
Volume587Pages:14
AbstractContinental arcs influence the global carbon cycle via degassing and chemical weathering. Several studies also suggested that the isotopic composition of continental arcs plays an important role in controlling the strontium (Sr) isotopic composition of seawater through chemical weathering. Yet, geological or tectonic drivers of isotopic variations of continental arcs on a global scale are missing in previous studies. Here, we compiled two independent global databases for mid-Cretaceous (125-85 Ma) continental arcs. The first database maps the location, geometry, and tectonic nature of the basements upon which the arcs were built. The second compiles Sr-Nd-Hf isotopes data for these continental arcs. We find that isotopically-juvenile arcs form when their basements are generated by tectonic processes such as oceanic terrane accretion, upper plate extension, slab breakoff, and ridge subduction. During the midCretaceous, most continental arcs were fully or partially built on juvenile basements and yielded juvenile isotopes on a global scale. Our compilation reinforces the importance of isotopically-juvenile continental arcs observed in the global Hf isotopes in detrital zircon for the mid-Cretaceous, but also provides the geological context for these trends. Since many of these isotopically-juvenile arcs were located in tropical or warm-temperate regions during the mid-Cretaceous, these uplifted rocks were preferentially eroded and weathered providing juvenile Sr isotopes to the oceans. This study highlights the importance of tectonic processes in controlling isotopic compositions of continental arc, which has implications for ocean chemistry, global chemical weathering feedback, and the long-term carbon cycle. (C)& nbsp;2022 Elsevier B.V. All rights reserved.
Keywordcontinental arcs arc basement isotopes seawater chemical weathering long-term carbon cycle
DOI10.1016/j.epsl.2022.117550
Funding OrganizationCao's startup funds at UNR ; Cao's startup funds at UNR ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSERC ; NSERC ; Cao's startup funds at UNR ; Cao's startup funds at UNR ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSERC ; NSERC ; Cao's startup funds at UNR ; Cao's startup funds at UNR ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSERC ; NSERC ; Cao's startup funds at UNR ; Cao's startup funds at UNR ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSERC ; NSERC
WOS KeywordCRUSTAL EVOLUTION ; SOUTH-AMERICA ; MAGMATISM ; TECTONICS ; MIGRATION ; SEAWATER ; HISTORY ; SYSTEMS ; RECORD ; GROWTH
Language英语
Funding ProjectCao's startup funds at UNR[PG10749] ; National Natural Science Foundation of China[41888101] ; NSERC[RGPIN-2019-05709]
Funding OrganizationCao's startup funds at UNR ; Cao's startup funds at UNR ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSERC ; NSERC ; Cao's startup funds at UNR ; Cao's startup funds at UNR ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSERC ; NSERC ; Cao's startup funds at UNR ; Cao's startup funds at UNR ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSERC ; NSERC ; Cao's startup funds at UNR ; Cao's startup funds at UNR ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSERC ; NSERC
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000794474600005
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105967
Collection新生代地质与环境院重点实验室
Corresponding AuthorCao, Wenrong
Affiliation1.Univ Nevada, Dept Geol Sci & Engn, MS-172,1664 N Virginia St, Reno, NV 89557 USA
2.Univ Ottawa, Dept Earth & Environm Sci, 25 Templeton St,ARC Bldg Room 419, Ottawa, ON K1N 6N5, Canada
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Cao, Wenrong,Bataille, Clement P.,Leuchter, Ethan R.,et al.

Tectonic controls on the isotopic juvenility of mid-Cretaceous continental arcs: Global compilations and implications for chemical weathering

[J]. EARTH AND PLANETARY SCIENCE LETTERS,2022,587:14.
APA Cao, Wenrong,Bataille, Clement P.,Leuchter, Ethan R.,&Zhou, Xiqiang.(2022).

Tectonic controls on the isotopic juvenility of mid-Cretaceous continental arcs: Global compilations and implications for chemical weathering

.EARTH AND PLANETARY SCIENCE LETTERS,587,14.
MLA Cao, Wenrong,et al."

Tectonic controls on the isotopic juvenility of mid-Cretaceous continental arcs: Global compilations and implications for chemical weathering

".EARTH AND PLANETARY SCIENCE LETTERS 587(2022):14.
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