- Title
- Brittle deformation events in the Lambert Glacier region (East Antarctica): insights into the tectonic control on the formation and evolution of the Lambert Graben
- Creator
- Laufer, A. L.; Phillips, G.
- Relation
- Terra Antartica Vol. 14, p. 61-68
- Relation
- http://www.mna.it/italiano/Editoria/TAP/volume14.html
- Publisher
- Universita degli Studi di Siena, Museo Nazionale dell'Antartide Felice Ippolito
- Resource Type
- journal article
- Date
- 2007
- Description
- The brittle structural architecture and tectonic history of the southern Prince Charles Mountains (PCM) in the Lambert Glacier region was studied by applying classic fault-slip analysis. Our data point to the presence of three brittle deformation events. The oldest event involves E-W to NE-SW directed contraction of uncertain, but likely pan-African age; reverse faults and co-genetic folds related to this event are overprinted by extensional faults attributed to the formation of the Lambert Graben. This roughly E-W directed extension together with co-genetic large-scale dextral transtension parallelling the main NNW-SSE oriented axis of the Lambert Graben (i.e. parallel to the Mawson Escarpment) is tentatively related to the Cretaceous break-up of Gondwana and the separation of India from Antarctica. The youngest brittle deformation event observed in the southern PCM is related to NW-SE directed contraction and co-genetic NE-SW extension. It is responsible for reactivation and reversal of the Cretaceous major faults and also for present-day geomorphology in the Lambert Glacier region.
- Subject
- Prince Charles Mountains; Lambert Glacier region, Antarctica; brittle deformation events; geomorphology; fault tectonics
- Identifier
- http://hdl.handle.net/1959.13/34049
- Identifier
- uon:3506
- Identifier
- ISSN:1122-8628
- Language
- eng
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