The DOI matches its Crossref record; 47 of the 47 references it cites were found in a registry or an index.
Crustal thickness control on Sr/Y signatures of recent arc magmas: an Earth scale perspective
Open accessAbstract
Arc magmas originate in subduction zones as partial melts of the mantle, induced by aqueous fluids/melts liberated by the subducted slab. Subsequently, they rise through and evolve within the overriding plate crust. Aside from broadly similar features that distinguish them from magmas of other geodynamic settings (e.g., mid-ocean ridges, intraplate), arc magmas display variably high Sr/Y values. Elucidating the debated origin of high Sr/Y signatures in arc magmas, whether due to mantle-source, slab melting or intracrustal processes, is instrumental for models of crustal growth and ore genesis. Here, using a statistical treatment of >23000 whole rock geochemical data, I show that average Sr/Y values and degree of maturation (MgO depletion at peak Sr/Y values) of 19 out of 22 Pliocene-Quaternary arcs correlate positively with arc thickness. This suggests that crustal thickness exerts a first order control on the Sr/Y variability of arc magmas through the stabilization or destabilization of mineral phases that fractionate Sr (plagioclase) and Y (amphibole ± garnet). In fact, the stability of these mineral phases is function of the pressure at which magma evolves, which depends on crustal thickness. The data presented show also that high Sr/Y Pliocene-Quaternary intermediate-felsic arc rocks have a distinct origin from their Archean counterparts.
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Cites
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Cited by
Chapman, J. B., Ducea, M. N., DeCelles, P. G., & Profeta, L. (2015) · Geology · doi:10.1130/g36996.1 · Cited by 458
Metadata
- Authors
- Chiaradia, M.
- Venue
- Scientific Reports
- Published
- 2015-01-29
- Volume
- 5
- Issue
- 1
- Pages
- 8115-8115
- ISSN
- 2045-2322 (ISSN-L)
- OpenAlex
- W2028120826
- Cited by
- 314
- References
- 47
- FWCI
- 21.58
- Type
- journal article
- Language
- en
- Open access
- gold
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