Abstract

New Nd isotopic data suggest that Paleozoic turbidites in the Ouachita fold belt (Arkansas and Oklahoma) had a dominantly Appalachian provenance after Middle Ordovician time. We infer a long-lived sedimentary dispersal system of isotopically homogeneous detritus linked to Appalachian tectonics. By Carboniferous time, both the continental surface and the closing Ouachita trough were apparently flooded with sediment derived from the Appalachian collisional orogen.

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GeoRef Subject
Appalachians Carboniferous Arkansas Arkoma Basin Middle Ordovician Oklahoma paleogeography Ordovician Paleozoic Pennsylvanian Nd-144/Nd-143 neodymium Permian sedimentary rocks metals Ouachita Belt clastic rocks turbidite United States Sevier orogenic belt isotope ratios rare earths stable isotopes sedimentation shale Black Warrior Basin Illinois Basin isotopes sandstone flysch North America
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