Primary Sulfur Isotopes of Intraplate Basalts and Implications for Deep S Recycling of Altered Oceanic Crust
| Title: | Primary Sulfur Isotopes of Intraplate Basalts and Implications for Deep S Recycling of Altered Oceanic Crust |
|---|---|
| Authors: | Xiang Wang, Zaicong Wang, Pu Sun, Zong‐Feng Yang, Wen Zhang, Zongqi Zou, Stephen Foley, Lang Wang, Keqing Zong, Zhaochu Hu, Yongsheng Liu |
| Source: | Geophysical Research Letters, Vol 51, Iss 24, Pp n/a-n/a (2024) |
| Publisher Information: | Wiley, 2024. |
| Publication Year: | 2024 |
| Collection: | LCC:Geophysics. Cosmic physics |
| Subject Terms: | sulfur cycle, clinopyroxene megacryst, continental intraplate basalt, recycled oceanic crust, redox process, eastern China, Geophysics. Cosmic physics, QC801-809 |
| More Details: | Abstract Altered oceanic crust (AOC) is the largest contributor to the subducted sulfur (S) budget and its recycling modulates the redox evolution and S distribution in the mantle. However, the role of AOC in the deep cycling of S remains poorly constrained. Here we probe the primary S isotopes of Cenozoic intraplate basalts in eastern China by investigating sulfide inclusions in magmatic clinopyroxene megacrysts. These basalts were derived from the deep mantle metasomatized by melts derived from recycled AOC but show MORB‐like S isotopes (−0.9–0.9‰), suggesting that AOC‐derived melts transfer negligible sulfate and hardly change the δ34S and redox state of the deeper mantle. This contrasts with the generally high δ34S values of mantle wedge peridotites and primary arc magmas that reflect the slab addition of sulfate, indicating that S species and isotopes released from the subducted slab and associated fO2 are not constant and vary with subduction depth. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1944-8007 0094-8276 |
| Relation: | https://doaj.org/toc/0094-8276; https://doaj.org/toc/1944-8007 |
| DOI: | 10.1029/2024GL111829 |
| Access URL: | https://doaj.org/article/67b07c9648ee4ad59e83c2169758eb1e |
| Accession Number: | edsdoj.67b07c9648ee4ad59e83c2169758eb1e |
| Database: | Directory of Open Access Journals |
| ISSN: | 19448007 00948276 |
|---|---|
| DOI: | 10.1029/2024GL111829 |
| Published in: | Geophysical Research Letters |
| Language: | English |