Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Wang, Chengyuan1,2,3,4; Foley, Stephen F.2; Liu, Yongsheng3; Wang, Yu1; Xu, Yi-Gang1,4
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| Origin of carbonate melts in orogenic belts by anatexis of downthrust carbonate sediments | |
| Source Publication | EARTH AND PLANETARY SCIENCE LETTERS
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| ISSN | 0012-821X |
| 2023-10-01 | |
| Volume | 619Pages:10 |
| DOI | 10.1016/j.epsl.2023.118303 |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics |
| Abstract | Carbonate melts produced by partial melting of the carbonated mantle or by liquid immiscibility from mantle-derived silicate melts provide insights into the deep carbon cycle. Sedimentary geochemical signatures in some of the carbonate melts have been attributed to subducted material within their mantle sources. However, subducted carbonates at slab tops may not melt but be transported to the deep mantle, where sedimentary signatures would be diluted by mantle rocks. Here, we report the intruded Cenozoic carbonate melt dykes from the Yanshan orogen - an intracontinental orogenic belt far from the subduction zone - which show strong limestone-like geochemical features. Xenocrysts from the deep crustal basement, together with Sr-Nd-C-O isotope variations, indicate assimilation of the deep continental crust accompanied by CO2 degassing. We suggested they were formed by melting of downthrust limestone strata in the Yanshan orogen, triggered by underplating with basaltic melts during the Cenozoic upwelling of asthenosphere below the area. A compilation of global Phanerozoic carbonate magmas shows that this model can apply to many carbonate melts in orogenic belts which show much more evolved Sr-Nd isotopes and heavier C-O isotopes than those in intraplate settings. Trace elements of these carbonate melts indicate shallow derivation with a negligible contribution of mantle rocks. Spatial-temporal distribution of the orogenic carbonate melts supports them being related to continental crustal collision rather than oceanic subduction. Our findings highlight the carbonate sediments deposited in the continental crust as an important source that may deeply downthrust in the orogenic belt and melt during the post-collision stage.& COPY; 2023 Elsevier B.V. All rights reserved. |
| Keyword | carbonate melts orogenic belts carbonate sediments anatexis post-collision |
| WOS ID | WOS:001051074400001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74747 |
| Collection | 同位素地球化学国家重点实验室 |
| Corresponding Author | Liu, Yongsheng; Wang, Yu |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.Macquarie Univ, Sch Nat Sci, N Ryde, NSW 2109, Australia 3.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 4.Southern Manne Sci & Engineenng Guangdong Lab Gua, Guangzhou 510640, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Chengyuan,Foley, Stephen F.,Liu, Yongsheng,et al. Origin of carbonate melts in orogenic belts by anatexis of downthrust carbonate sediments[J]. EARTH AND PLANETARY SCIENCE LETTERS,2023,619:10. |
| APA | Wang, Chengyuan,Foley, Stephen F.,Liu, Yongsheng,Wang, Yu,&Xu, Yi-Gang.(2023).Origin of carbonate melts in orogenic belts by anatexis of downthrust carbonate sediments.EARTH AND PLANETARY SCIENCE LETTERS,619,10. |
| MLA | Wang, Chengyuan,et al."Origin of carbonate melts in orogenic belts by anatexis of downthrust carbonate sediments".EARTH AND PLANETARY SCIENCE LETTERS 619(2023):10. |
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