Sohini Sur, Michael J. Soreghan, Gerilyn S. Soreghan, Alice F. Stagner; Extracting the Silicate Mineral Fraction from Ancient Carbonate: Assessing the Geologic Record of Dust. Journal of Sedimentary Research ; 80 (8): 763–769. doi: https://doi.org/10.2110/jsr.2010.068
Download citation file:
The climatic influence of eolian dust (particles < 63 μm) is well recognized in the Cenozoic earth system, but less so for the pre-Cenozoic. In ancient carbonate rocks that formed isolated from fluvio-deltaic influx, the silicate mineral fraction can, in some cases, represent atmospheric dust. Here we present a methodology for sequential extraction of carbonate, organic matter, pyrite, and iron oxide from pre-Cenozoic carbonate strata to isolate the eolian fraction, and illustrate the application to stratigraphic sequences from a late Paleozoic carbonate buildup and ramp setting.