The seismic structure of the Antarctic upper mantle

DA Wiens, W Shen, AJ Lloyd - 2023 - pubs.geoscienceworld.org
The deployment of seismic stations and the development of ambient noise tomography as
well as new analysis methods provide an opportunity for higher-resolution imaging of …

Defects in olivine

S Demouchy - European Journal of Mineralogy, 2021 - ejm.copernicus.org
Olivine, a ferromagnesian orthosilicate, is the most abundant mineral in Earth's upper mantle
and is stable down to the olivine–wadsleyite phase transition, which defines the 410 km …

Hydration state and rheologic stratification of the lithospheric mantle beneath the North Anatolian fault, Turkey

AD Lusk, V Chatzaras, E Aldanmaz… - Geochemistry …, 2023 - Wiley Online Library
We present constraints on the hydration state and rheology of the lithospheric mantle
beneath the North Anatolian fault zone (NAFZ). Peridotite xenoliths from the Biyikali and …

Microstructural Insights into the Evolution of Ophiolitic Chromite from Luobusha

Y Yang, J Yang, W Wu, P Cai, H Ma - Minerals, 2023 - mdpi.com
The podiform chromitite found within the Luobusha ophiolite comprises characteristic
nodules and massive chromitites. However, the exact origin of these formations remains a …

The effects of partial melting and metasomatism on peridotite water contents: insights from Shuangliao Volcano Group, Northeast China

CY Zhu, H Chen, YT Hao, Q Xia - Journal of Petrology, 2024 - academic.oup.com
Many minerals within the subcontinental lithospheric mantle (SCLM) contain structurally
bonded hydrogen (commonly referred to as 'water'), which significantly impacts their …

Seismological evidence for girdled olivine lattice‐preferred orientation in oceanic lithosphere and implications for mantle deformation processes during seafloor …

JB Russell, JB Gaherty, HF Mark, G Hirth… - Geochemistry …, 2022 - Wiley Online Library
Seismic anisotropy produced by aligned olivine in oceanic lithosphere offers a window into
mid‐ocean ridge (MOR) dynamics. Yet, interpreting anisotropy in the context of grain‐scale …

[HTML][HTML] Microstructures, hydrogen concentrations, and seismic properties of a tectonically exhumed sliver of oceanic mantle lithosphere, Moa Island, Timor-Tanimbar …

S Demouchy, F Barou, A Ishikawa, E Gardés… - Tectonophysics, 2024 - Elsevier
We characterize and quantify the microstructure, hydrogen concentrations, and seismic
properties of a tectonically exhumed sliver of oceanic lithospheric mantle outcropping in the …

Effects of melt-percolation, refertilization and deformation on upper mantle seismic anisotropy: constraints from peridotite xenoliths, Marie Byrd Land, West Antarctica

V Chatzaras, SC Kruckenberg - 2023 - pubs.geoscienceworld.org
We report on the petrology, microstructure and seismic properties of 44 peridotite xenoliths
extracted from the upper mantle beneath Marie Byrd Land (MBL), West Antarctica. The aim …

Microstructural Relationship between Olivine and Clinopyroxene in Ultramafic Rocks from the Red Hills Massif, Dun Mountain Ophiolite

Y Shao, M Negrini, C Liu, R Gao - Minerals, 2023 - mdpi.com
The microstructural relationship between olivine and clinopyroxene is significant in
recovering the mantle evolution under clinopyroxene-saturated melting conditions. This …

From dry to damp and stiff mantle lithosphere by reactive melt percolation atop the Hawaiian plume

S Demouchy, A Tommasi - Earth and Planetary Science Letters, 2021 - Elsevier
Predicting the incorporation of hydrogen (H) in the atomic structure of upper mantle minerals
is a major target in geodynamics since hydration impacts essential physico-chemical …