Regional Structures and Geodynamic Evolution of North Greenwich (Fort Williams Point) and Dee Islands, South Shetland Islands
作者： Jean Francois Dumont , Essy Santana , Francisco Hervé , Carlos Zapata
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摘要: Morphological and structural studies of the Fort Williams Point area (Greenwich Dee Islands) reveal two regional trends, NE-SW NW-SE. Detailed field observations show that NWSE direction is associated with dykes fractures resulting from a NW-SE shortening. This shortening interpreted as related to active basaltic volcanism during Mesozoic “Andean” history area. The trend trending sinistral faults post-dating Cretaceous volcanic units. Kinematic analysis shows roughly N-S event opening Bransfield Basin located south-east.
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