DETRITAL-ZIRCON GEOCHRONOLOGY OF ACADIAN FORELAND BASIN STRATA OF WEST VIRGINIA AND VIRGINIA
Detrital-zircon samples collected from Devonian synorogenic clastic wedges of the central Appalachian foreland basin (N = 3, n=289) have various age populations including those coeval with early Paleozoic (Taconic') magmatism (ca. 440-490 Ma), the Grenville orogen and associated Granite-Rhyolite Province (0.9-1.5 Ga), the Pan-African orogen (0.5-0.7 Ga), the Mid-Continent and Central-Plains orogens (1.6-1.9 Ga) and Superior Province (ca. 2.7 Ga). On the other hand, samples (N = 4, n=383) collected from Devonian and Silurian units deposited during interpreted orogenic quiescence are dominated by Grenville and associated Granite-Rhyolite Province zircons with minor contributions from the Mid-Continent, Central-Plains orogens and Superior provinces, but do not contain zircons coeval with early Paleozoic Appalachian magmatism and the Pan-African orogen.