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Geochemistry of Olivine Melt Inclusion Reveals Interactions Between Deeply Derived Carbonated Melts From the Big Mantle Wedge and Pyroxenite in the Lithospheric Mantle Beneath Eastern Asia
- Source :
- Geophysical Research Letters, Vol 51, Iss 15, Pp n/a-n/a (2024)
- Publication Year :
- 2024
- Publisher :
- Wiley, 2024.
-
Abstract
- Abstract Our current knowledge regarding the distribution patterns of ancient and recent recycled materials, as well as the origin of intraplate basalts in the eastern Asia Big Mantle Wedge (BMW), is limited. To address this, we conducted a detailed geochemical analysis of olivine melt inclusions (OLMI) in nephelinite samples. The normal OLMIs detected in our investigation exhibit geochemical features that closely resemble those of the hosting nephelinite, indicating a consistent association with a carbonated mantle source. Additionally, we identified a distinct group of anomalous OLMIs that displayed different geochemical characteristics from the hosting nephelinite but showed similarities to regional alkali basalts sourced from pyroxenite. The observed geochemical diversity in the nephelinite OLMIs suggests an interaction between deeply derived carbonated melts originating from the flattened Pacific slab in the mantle transition zone and pyroxenite in the lithospheric mantle. Carbonated fluid‐fluxed melting is key to basalt formation in the BMW.
- Subjects :
- Geophysics. Cosmic physics
QC801-809
Subjects
Details
- Language :
- English
- ISSN :
- 19448007 and 00948276
- Volume :
- 51
- Issue :
- 15
- Database :
- Directory of Open Access Journals
- Journal :
- Geophysical Research Letters
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.8dc1a94b8c4bb9a6303e474712ef9d
- Document Type :
- article
- Full Text :
- https://doi.org/10.1029/2024GL108234