Publication Date:
2024-04-20
Description:
Ophicarbonate is an important type of hydrothermally altered ultramafic rock that occurs in spreading centers and trenches, and in the interface between a subducting slab and the overlying mantle wedge. High-pressure experiments were performed at 10-15 GPa and 700-1100 oC to investigate the phase relations of subducted ophicarbonate. Ten samples were recovered after the experiments. In the recovered experimental charges, hydrous phases include phases A, D, and E; anhydrous minerals include clinopyroxene, orthopyroxene, garnet, magnesite, and olivine/wadsleyite. Phase compositions in the recovered charges were analyzed with an electron probe micro-analyzer (EPMA, JXA-8100), installed at the Key Laboratory of Submarine Geosciences, State Oceanic Administration. The accelerating voltage, beam current and beam size were 15 kv, 20 nA and 1-2 μm, respectively, for minerals, and 15 kv,10 nA and 5-30 μm, respectively, for quench phases. Count times were 10s for each of the measured element and 5s for the background. Standard materials were diopside for SiO2, MgO and CaO, jadeite for Na2O, K-feldspar for K2O, hematite for FeO, pyrope for Al2O3, NiO for NiO, apatite (Ca5P3F) for P2O5, rutile for TiO2, and eskolaite (Cr2O3) for Cr2O3.
Keywords:
Binary Object; Binary Object (File Size); Binary Object (Media Type); cold subduction zone; File content; hydrous carbonatitic liquids; Ophicarbonate
Type:
Dataset
Format:
text/tab-separated-values, 6 data points
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