Nd isotopic constraints on sediment sources of the Ouachita-Marathon fold belt

J. D. Gleason, P. J. Patchett, W. R. Dickinson, Joaquin Ruiz

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Nd isotopes for the overthrust deep-marine Ouachita-Marathon sedimentary assemblage of Arkansas-Oklahoma and west Texas, and associated Paleozoic shelf and foreland deposits, resolved into three distinct populations: 1) Lower to Middle Ordovician, εNd = -13 to -16 (average TDM = 2.0 Ga); 2) Upper Ordovician to Pennsylvanian, εNd = -6 to -10 (average TDM = 1.6 Ga); and 3) Mississippian tuffs, εNd = -1 to -3 (average TDM = 1.1 Ga). A rapid shift in εNd from -15 (passive margin shales) to -7 (orogenic turbidites) in the Ouachita assemblage at ca. 450 Ma implies termination of craton-dominated sources and the emergence of the Appalachian orogen as the primary source of sediment for sea floor lying south of North America. Nd isotopes in fluvio-deltaic strata of the Ouachita-Appalachian foreland and continental interior, that is, Arkoma, Illinois, and Black Warrior basin (εNd = -7 to -10), imply that continental margin pathways and interior basins received the same detritus as the Ouachita trough by Pennsylvanian time. -from Authors

Original languageEnglish (US)
Pages (from-to)1192-1210
Number of pages19
JournalBulletin of the Geological Society of America
Volume107
Issue number10
DOIs
StatePublished - 1995

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Pennsylvanian
fold belt
Ordovician
isotope
continental interior
passive margin
basin
sediment
detritus
craton
continental margin
trough
seafloor
Paleozoic
North America

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Nd isotopic constraints on sediment sources of the Ouachita-Marathon fold belt. / Gleason, J. D.; Patchett, P. J.; Dickinson, W. R.; Ruiz, Joaquin.

In: Bulletin of the Geological Society of America, Vol. 107, No. 10, 1995, p. 1192-1210.

Research output: Contribution to journalArticle

Gleason, J. D. ; Patchett, P. J. ; Dickinson, W. R. ; Ruiz, Joaquin. / Nd isotopic constraints on sediment sources of the Ouachita-Marathon fold belt. In: Bulletin of the Geological Society of America. 1995 ; Vol. 107, No. 10. pp. 1192-1210.
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