Abiotic methane synthesis and serpentinization in olivine-hosted fluid inclusions
نویسندگان
چکیده
منابع مشابه
Chemical zonation in olivine-hosted melt inclusions
Significant zonation in major, minor, trace, and volatile elements has been documented in naturally glassy olivine-hosted melt inclusions from the Siqueiros Fracture Zone and the Galapagos Islands. Components with a higher concentration in the host olivine than in the melt (e.g., MgO, FeO, Cr2O3, and MnO) are depleted at the edges of the zoned melt inclusions relative to their centers, whereas ...
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Oze et al. (1) observed generation of methane (CH4) during experimental serpentinization of olivine, and use the results to make inferences about sources of methane in natural serpentinites. Their data interpretation, however, is directly contradicted by results of prior studies, critically undermining the credibility of their conclusions. Several prior studies conducted using experimental meth...
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Melt inclusion and host glass compositions from the eastern end of the Southwest IndianRidge showaprogressive depletion in light rare earth elements (LREE), Na8 and (La/Sm)n, but an increase in Fe8, from the NE (648E) towards the SW (498E).These changes indicate an increase in the degree of mantle melting towards the SWand correlate with a shallowing of the ridge axial depth and increase in cru...
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[1] Spatial variability of methane (CH4) on Mars suggests the presence of localized subsurface sources. Here, we show that olivine hydration in the Martian regolith and crust may be a major CH4 source, which contributed significantly to the warming of early Mars. Methane production is kinetically and thermodynamically favored during low-T aqueous alteration of olivine-rich rocks. Sustained rele...
متن کاملMETHANE AND EXCESS N2 AND Ar IN GEOTHERMAL FLUID INCLUSIONS
Examination of thousands of fluid inclusion gas analyses has led us to question some working hypotheses associated with interpretations of N2/Ar ratios in geothermal volatiles. Fluid inclusion gas analyses, some confirmed by analyses of present fluids, indicate that geothermal fluids have N2 and Ar concentrations about 10 times greater than in air saturated water. Also, high N2/Ar ratios are as...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2019
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1907871116