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10 results for “metasomatism”
Metasomatic reactions between Archean dunite and trondhjemite at the Seqi Olivine Mine in Greenland
<p>Supplementary materials relating to the paper: Metasomatic reactions between Archean dunite and trondhjemite at the Seqi Olivine Mine in Greenland by Wyatt et al.</p>
Additional data and models for the article "Role of metasomatism in the development of the East African Rift at the Northern Tanzanian Divergence: Insights from 3D magnetotelluric modelling."
<p>Additional data and models for the article "Role of metasomatism in the development of the East African Rift at the Northern Tanzanian Divergence: Insights from 3D magnetotelluric modelling."</p> <p>This data package includes:</p> <p>1-ModEM rho and dat format files of the final preferred model.</p> <p>2-vtk version of this model</p> <p>3-Scripts to plot the MT models</p> <p>4-Water content models calculated with MATE</p> <p>5-Scripts to plot the water content models</p> <p>6-Parameter files used in water calculation with MATE</p> <p>7- EDI files used in the model.</p>
Barium isotope variation during fluid-rock interaction at forearc depths: evidence from the high-pressure fluid-metasomatized rocks in the Eastern Alps
<p><a name="OLE_LINK7"></a><a name="OLE_LINK1"></a><span><span>The supporting information presents the analytical methods of whole-rock major-trace element compositions and Mg–Fe isotope compositions , as well as whole-rock major-trace elements and Fe–Mg–Sr isotope data</span></span><span><span>.</span></span></p>
Carbonatite metasomatism in subvolcanic settings: implications for magmatic evolution and eruptive style
<p>The supplementary tables S1-S4 which support for the manuscript "Carbonatite metasomatism in subvolcanic settings: implications for magmatic evolution and eruptive style"</p>
Strong Physical Contrasts across Two Mid-lithosphere Discontinuities beneath the Northwestern United States: Evidence for Cratonic Mantle Metasomatism
<p>Data files for "Strong Physical Contrasts across Two Mid-lithosphere Discontinuities beneath the Northwestern United States: Evidence for Cratonic Mantle Metasomatism". See ReadMe.txt for details.</p>
Fore-arc metasomatism by hybrid slab fluids during subduction initiation: Sr–Mg–Ca isotopes of rodingite, western Yarlung Zangbo suture zone
<p> Subduction zone metasomatism is critical for Earth’s material exchanges, yet understanding slab dehydration, particularly deserpentinization beneath fore-arcs, remains challenging. Here, we present Sr–Mg–Ca isotopic data for the Purang rodingites in the western Yarlung-Zangbo suture zone (YZSZ). These rodingites, dominated by amphibolite- to greenschist-facies minerals like tremolite, magnesiohornblende, and chlorite, exhibit cumulate textures and rare earth element patterns resembling troctolites or gabbronorites, presumably formed beneath a seafloor spreading center. The rodingites are enriched in large ion lithophile elements and depleted in high field strength elements. They show higher initial <sup>87</sup>Sr/<sup>86</sup>Sr ratios (0.7067–0.7075) and elevated δ<sup>26</sup>Mg values (–0.22 ± 0.07‰ to –0.13 ± 0.02‰) compared to pristine oceanic basalts, while their δ<sup>44/40</sup>Ca values (0.72 ± 0.02‰ to 0.87 ± 0.03‰) correspond to mid-ocean ridge basalts (MORB). These features imply fore-arc mantle metasomatism of an original MOR-derived protolith at <40 km slab depth, driven by Sr- and Mg-rich fluids from clay-rich sediments and serpentinitized mantle, respectively. The measured Sr and Mg isotope compositions can be reproduced by mixing a MORB-like protolith with hybrid fluids derived from 70–30% clays and 30–70% serpentinites, with a fluid-to-rock ratio of approximately 1:3–1:5. Combined with studies on YZSZ metamorphic soles, we propose this metasomatism occurred during incipient subduction of the Neo-Tethys oceanic rocks. Our studies highlight the significance of deserpentinization at shallow fore-arc mantle settings during subduction initiation and suggest that subducting slabs exhibit more varied dehydration characteristics than previously recognized.</p>
Mantle xenoliths used in "High P-T sound velocities of amphiboles: Implications for low-velocity anomalies in metasomatized upper mantle"
<p>Mineral proportions in hydrous-mineral-bearing mantle xenoliths collected worldwide and their calculated sound velocities in this study. </p>
Data for Lindquist et al., Metasomatism and slow slip: talc production along the flat subduction plate interface beneath Mexico (Guerrero)
<p>A compilation of data supporting our 2023 G-Cubed manuscript submission "Metasomatism and slow slip: talc production along the flat subduction plate interface beneath Mexico (Guerrero)," including<br> (1) and Excel file containing bulk compositions and phase solution models used in our Perple_X modeling</p> <p>(2) text files of all the output Perple_X data that were used for calculations of results presented in the manuscript, including mineral modes, densities, and silica contents</p>
Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia
<p>SUPPLEMENT FILE 1: LA-ICP-MS and EPMA analyses for pyrope garnet and Cr diopside used in study. </p>
Ba-Mg isotopes in high Ba-Sr granites record melt-metasomatized mantle and crustal growth
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