Table · dataset · 2026
<b>Dehydration of Serpentinites from Mantle Wedge and Subducted Slabs: Insights from Magnesium Isotopes of Arc and Back-arc Lavas</b>
Listed in figshare and Loughborough Research Repository — shown once because both records carry DOI 10.6084/m9.figshare.31901131.v2
<p dir="ltr">Water cycling in subduction zones is crucial for earthquakes and arc volcanism.
Description
Serpentinites serve as the primary vehicle for water cycling in subduction zones, yet geochemical constraints on their dehydration pathways remain scarce. Here, we investigate Mg isotope compositions of volcanic rocks across the Tonga-Kermadec and Ryukyu subduction zones, which show significant variations in slab depth, to trace serpentinite dehydration.
Both arc and back-arc lavas from these two subduction zones exhibit elevated δ<sup>26</sup>Mg (−0.31 to −0.08‰) compared to mantle (−0.29 to −0.21‰). The elevated δ<sup>26</sup>Mg signatures in arc lavas are consistent with the dehydration of mantle wedge serpentinites at subarc depths. In contrast, the elevated δ<sup>26</sup>Mg in back-arc lavas can be explained by fluids released from slab mantle serpentinites, which are cooler and thus dehydrate at greater depths.
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This study highlights the widespread involvement of serpentinite dehydration in water cycling across these subduction zones, from subarc to back-arc depths.</p>
Links
Where it is published
- DOI doi.org/10.6084/m9.figshare.31901131.v2 ↗
DOI / persistent id · from figshare com
Catalogue records · 1
- OAI-PMH record api.figshare.com/v2/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Af… ↗
metadata API · from figshare com
Topics
- From keywords
- Astronomy & Astrophysics · Chemistry · Chemistry · Computer Science & AI · Computer Science & AI · Earth & Environmental Science · Earth & Environmental Science · Economics & Finance · Economics & Finance · Engineering · Engineering · Humanities · Humanities · Isotope geochemistry · Isotope geochemistry · Life Sciences · Life Sciences · Materials Science · Mathematics & Statistics · Medicine & Health · Medicine & Health · Ocean & Atmospheric Science · Psychology & Behavioral Science · Social Science · Social Science
Provenance · 2 source records, 30 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| figshare | oai:figshare.com:article/31901131 | 4 d ago | JSON v1 |
| Loughborough Research Repository | oai:figshare.com:article/31901131 | 4 d ago | JSON v1 |
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|---|---|---|---|
| access_level | source · figshare com | connector:figshare_com@1.0.0 | |
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| concepts[field].anzsrc:field:370303 | mapping · figshare com | vocabulary-mapper@1.0.0 | keywords['Isotope geochemistry'] |
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| publication_date | source · figshare com | connector:figshare_com@1.0.0 | |
| title | source · figshare com | connector:figshare_com@1.0.0 | /metadata/dc/title |