- Title
- Late Ross-orogenic deformation of basement rocks in the northern Deep Freeze Range, Victoria Land, Antarctica; the Lichen Hills shear zone
- Creator
- Läufer, Andreas L.; Fisker, Frank; Phillips, Glen
- Relation
- Polarforschung Vol. 80, Issue 2, p. 60-70
- Relation
- http://epic.awi.de/29879/
- Publisher
- Deutsche Gesellschaft fuer Polarforschung e.V.
- Resource Type
- journal article
- Date
- 2011
- Description
- Kinematic data from the basement rocks exposed at Lichen Hills in the upper Rennick Glacier, northern Victoria Land, indicate the presence of an intra-Wilson Terrane late Ross-orogenic high-strain reverse shear zone. ENE directed ductile shearing and WSW-directed late-stage brittle reverse faults overprint metasedimentary rocks and thick leucogranites of the Granite Harbour Intrusives. The Ross-orogenic age of the structures is attested by the involvement of leucogranites in ductile shearing and cross-cutting relationships between younger aplitic dykes and brittle deformations. This structural pattern strongly supports a relationship between the Lichen Hills Shear zone and the Wilson Thrust in Oates Land, the eastern branch of a late-Ross bivergent high-strain thrust system. Post-Ross structures are represented by reverse off-sets of the – in this area – Triassic to early Jurassic Beacon strata that are probably related to volcanotectonic events during Ferrar intrusion and the Cenozoic development of NW-SE striking dextral faults and N-S striking large-scale normal faults that parallel the Rennick Glacier.
- Subject
- Antarctica; Lichen Hills Shear Zone; Ross Orogen; Wilson Mobile Belt; shear zones; basement rocks
- Identifier
- http://hdl.handle.net/1959.13/1061540
- Identifier
- uon:16969
- Identifier
- ISSN:0032-2490
- Language
- eng
- Full Text
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