How Particle Size Influences Oxidation of Ancient Organic Matter during Weathering of Black Shale.

ABSTRACT: Weathering continuously converts rock to regolith at Earth's surface while regulating the atmospheric concentrations of CO₂ and O₂. Shale weathering is of particular interest because shale, the most abundant rock type exposed on continents, stores much of the ancient organic carbon (OC_petro) buried in rocks. Using geochemical and mineralogical analysis combined with neutron scattering and imaging, we investigated the weathering profile of OC_petro in saprock in a black shale (Marcellus Formation) in the Ridge and Valley Appalachians in Pennsylvania, U.S.A. Consistent with the low erosion rate of the landscape, we discovered that Marcellus is completely depleted in carbonate, plagioclase, and pyrite in saprock below the soil layer. On the contrary,

SUBMITTER: Gu X 

PROVIDER: S-EPMC10166084 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature