Overview of radiometric ages in three allochthonous belts of northern Venezuela: Old ones, new ones, and their impact on regional geology
Published:January 01, 2005
Virginia B. Sisson, Hans G. Avé Lallemant, Marino Ostos, Ann E. Blythe, Lawrence W. Snee, Peter Copeland, James E. Wright, Raymond A. Donelick, Lawrence R. Guth, 2005. "Overview of radiometric ages in three allochthonous belts of northern Venezuela: Old ones, new ones, and their impact on regional geology", Caribbean-South American plate interactions, Venezuela, Hans G. Avé Lallemant, Virginia B. Sisson
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The margin of northern Venezuela is a complex zone representing the orogenic events from basement formation to subsequent subduction and exhumation during transpressional collision. This boundary zone has six east-west–trending belts that each record a different segment of its development. This geologic complexity requires radiometric ages to unravel, and we herein provide 48 new ages including U-Pb (4), Rb-Sr (2), 40Ar/39Ar (24), zircon and apatite fission-track (17), and 14C (1) ages to constrain the evolution of three of these belts. These three belts are the Cordillera de la Costa, Caucagua–El Tinaco, and Serranía del Interior belts....