Hans G. Avé Lallemant
Professor

Research:

Structural Geology, Tectonics

My research deals mainly with the kinematics of deformation in obliquely convergent or divergent and transform plate boundaries. The areas I am working in today are in Venezuela (Cordillera de la Costa belt, Villa de Cura complex, Serranía del Interior foreland fold and thrust belt), in Alaska (Aleutian volcanic island arc), Guatemala (Motagua fault zone), and France (North Pyrenean fault zone). In all these areas, plate convergence or divergence is strongly oblique to subparallel to the plate boundary zone. In such cases of oblique convergence, displacement partitioning occurs. The (sub)normal component of the convergence or divergence vector causes orogen- or arc-(sub)normal shortening (folds, thrust faults) or extension (normal faults); the orogen- or arc-parallel component causes simple-shear deformation and plate-boundary-parallel migration of the forearc and often of the arcregion. If the arc is arcuate (the general case), arc-parallel extensionmight occur (arc-perpendicular normal faults).

Research Projects:

Evolution of two high-pressure accretionary complexes in northern Venezuala

Thermal evolution of the Serranía del Interior foreland fold and thrust belt, Venezuala

Transcontraction, displacement partitioning, and arc parallel extension of the Aleutian volcanic arc

Petrogenesis and exhumation of jadeitites in Guatemala

Upper mantle evolution during rifting: Evidence from peridotite complexes along the North Pyrenean fault zone

SE Caribbean Plate Boundary Continental Dynamics Project

Selected Publications:

Avé Lallemant, H.G., Oldow, J.S., Ferranti, L., Maschio, L., Comstock, J., and Lewis, D., 1999, Displacement partitioning, trench-parallel stretching, and westward migration of the Aleutian arc and collision with Kamchatka: Part 1. Structural analysis: EOS (Transactions of the American Geophysical Union), v. 80 (46), p. F947.

Oldow, J.S., Lewis, D.S., Avé Lallemant, H.G., Ferranti, L., Maschio, L., Comstock, J., and Freymueller, J., 1999, Displacement partitioning, trench-parallel stretching, and westward migration of the Aleutian arc and collision with Kamchatka: Part 2. GPS geodetic analysis: EOS (Transactions of the American Geophysical Union), v. 80 (46), p. F947.

Avé Lallemant, H.G., Harlow, G.E., Sorensen, S.S., Sisson, V.B., Htun, Han, and Soe, Myint, 2000, The Nansibon jade mines, Myanmar: Structure and tectonics: EOS (Transactions of the American Geophysical Union), v. 81(48), p. F1108.

Sisson, V.B., and Avé Lallemant, H.G., 2001, Evolution of the Cretaceous to Recent orogenic belt of northern Venezuela: Geological Society of America Abstracts with Programs, v.33 (6), p. A-154.

Sorensen, S.S., Sisson, V.B., and Avé Lallemant, H.G., 2001, Tectonogeochemistry of the Cordillera de la Costa eclogite belt, Venezuela: Geological Society of America Abstracts with Programs, v. 33 (6), p. A-250.

Avé Lallemant, H.G., Oldow, J.S., and Lewis, D.S., 2001,Displacement partitioning, boundary-parallel terrane migration, and arc-parallel extension in the Aleutian Islands based on structural analysis and GPS geodesy: EOS (Transactions of the American Geophysical Union), 27 February, 2002

Pending Publications

Avé Lallemant, H.G.,Sisson, V. B., "Caribbean / South American plate interactions, Venezuela" GSA [proposed special paper].

For a complete list of publications, click here.

Jaime Perez, Ph.D candidate - "Structure and fission-track analysis of the Serranía del Interior Central, Venezuela"