Chemical and isotopic analyses of hydrocarbon-bearing fluid inclusions in olivine-rich rocks.

ABSTRACT: We examined the mineralogical, chemical and isotopic compositions of secondary fluid inclusions in olivine-rich rocks from two active serpentinization systems: the Von Damm hydrothermal field (Mid-Cayman Rise) and the Zambales ophiolite (Philippines). Peridotite, troctolite and gabbroic rocks in these systems contain abundant CH₄-rich secondary inclusions in olivine, with less abundant inclusions in plagioclase and clinopyroxene. Olivine-hosted secondary inclusions are chiefly composed of CH₄ and minor H₂, in addition to secondary minerals including serpentine, brucite, magnetite and carbonates. Secondary inclusions in plagioclase are dominated by CH₄ with variable amounts of H₂ and H₂O, while those in clinopyroxene contain

SUBMITTER: Grozeva NG 

PROVIDER: S-EPMC7015310 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature