Deformation, CPO, and Elastic Anisotropy in Low‐Grade Metamorphic Serpentinites, Atlantis Massif Oceanic Core Complex

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چکیده

Crystallographic preferred orientation (CPO) and the associated seismic anisotropy of serpentinites are important factors for understanding tectonic settings involving hydrated Earth´s mantle, example, at slow-spreading mid-ocean ridges. CPO lizardite magnetite in low-grade metamorphic from Atlantis Massif oceanic core complex (Mid-Atlantic Ridge, 30°N) were determined using synchrotron high energy X-ray diffraction combination with Rietveld texture analysis. Serpentinite mesh structures show weak while deformed samples a single (0001) maximum perpendicular to foliation. Seismic anisotropies calculated up >11% compressional waves (Vp) shear wave splitting 0.38 km/s samples. This indicates that deformation zones controls elastic highlights its importance defining signature upper mantle.

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ژورنال

عنوان ژورنال: Geophysical Research Letters

سال: 2021

ISSN: ['1944-8007', '0094-8276']

DOI: https://doi.org/10.1029/2021gl092986