The Andean Thrust System—Latitudinal Variations in Structural Styles and Orogenic Shortening
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Published:January 01, 2004
ABSTRACT
The different segments of the Andean thrust system have distinctive topography and inferred crustal roots. These two characteristics both depend upon crustal shortening, and on this basis they provide independent constraints for evaluating estimates of Cenozoic shortening obtained by balanced structural cross-sections of different segments of the fold-and-thrust systems. Three transects in the Central Andes are analyzed: a northern (22–23°S), a central (32–33°S), and a southern segment (37–39°S). Each segment shows different amounts of orogenic shortening, generated through a complex combination of thin- and thick-skinned thrusting. Based on known age constraints, different shortening rates are calculated for each segment....
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Contents
Thrust Tectonics and Hydrocarbon Systems

Thrust Tectonics and Hydrocarbon Systems resulted from an international conference at Royal Holloway University in London. The volume contains 33 chapters divided into four sections:Geodynamics of Thrust Systems, Analog Modeling of Thrust Systems, Fault-Related Folds in Thrust Systems,and Case Studies. These papers summarize recent advances in thrust studies and their application to hydrocarbon exploration and production.Key topics addressed include the application of the critically tapered Coulomb wedge model to thrust systems both in nature and in experiments, the interaction of surface proceses with thrust systems, basement-involved thrust systems and inversion, fault-related folds in thrust belts, and growth stratal development in thrust belts. Fold-and thrust belts described and discussed in this volume include the Alps, the Andes, the Apennines, the Appalacians, the Alice Springs Orogen in Australia, the Albanides, the Atlas in Morocco, the Canadian Cordillera and the Canadian Rocky Mountains, Kutei Basin, Kalimantan, the Himalayas, the New England Orogen, Papua New Guinea, and the Spanish Pyrenees, as well as depwater fold and thrust belts such as the Niger Delta and the Gulf of Mexico. Memoir 82 provides an in-depth look at thrust tectonics and hydrocarbon systems, and is a milestone publication as a major new examination of thrust fault systems.