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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Research Methods Papers
Extracting the Silicate Mineral Fraction from Ancient Carbonate: Assessing the Geologic Record of Dust
Abstract
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.
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