Petrologic and Structural History of Tobago, West Indies: A Fragment of the Accreted, Mesozoic Oceanic Arc of the Southern Caribbean

Member Non-Member   $5.00 $5.00   View Table of Contents by Arthur W. Snoke David W. Rowe Geoffrey Wadge J. Douglas Yule Year Published:  2001 Total Pages:  54 ISBN:  081372354X Product Code:  SPE354 Petrologic, geochemical, and isotopic data for the igneous and metamorphic rocks exposed on Tobago, West Indies, indicate an origin in an intraoceanic-arc system. However, these Mesozoic rocks now form part of an allochthonous terrane (Tobago terrane) within the South American–Caribbean plate-boundary zone. Tobago provides an exceptional opportunity to study compositional and structural variations of an ancient oceanic-arc sequence at contrasting structural levels. A greenschist- to amphibolite-facies metavolcanic and metasedimentary schist belt forms the footwall block, whereas an Albian ultramafic to tonalitic plutonic suite and coeval Tobago Volcanic Group form the hanging-wall block of the plastic-to-brittle Central Tobago normal-sense fault system. This book is a detailed petrologic and structural analysis of the Mesozoic oceanic-arc crust exposed on Tobago. Geologic maps, cross sections, structural stereograms, detailed field and petrographic descriptions, and numerous photographs provide an extensive data base for comparison with other oceanic-arc rocks exposed throughout the Caribbean region as well as in other orogens.

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