Mineral composition and 40Ar-39Ar data of samples from Garnet Point, Aurora Peak, Correll Nunatak, Penguin Point and Horn Bluffs, East Antarctica ...

• Main Authors: Di Vincenzo, Gianfranco, Talarico, Franco M, Kleinschmidt, Georg
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2007
• Subjects: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Antarctica; East Antarctica; George V Land; Mertz Glacier; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.847466; https://doi.pangaea.de/10.1594/PANGAEA.847466

George V Land (Antarctica) includes the boundary between Late Archean-Paleoproterozoic metamorphic terrains of the East Antarctic craton and the intrusive and metasedimentary rocks of the Early Paleozoic Ross-Delamerian Orogen. This therefore represents a key region for understanding the tectono-metamorphic evolution of the East Antarctic Craton and the Ross Orogen and for defining their structural relationship in East Antarctica, with potential implications for Gondwana reconstructions. In the East Antarctic Craton the outcrops closest to the Ross orogenic belt form the Mertz Shear Zone, a prominent ductile shear zone up to 5 km wide. Its deformation fabric includes a series of progressive, overprinting shear structures developed under different metamorphic conditions: from an early medium-P granulite-facies metamorphism, through amphibolite-facies to late greenschist-facies conditions. 40Ar-39Ar laserprobe data on biotite in mylonitic rocks from the Mertz Shear Zone indicate that the minimum age for ... : Supplement to: Di Vincenzo, Gianfranco; Talarico, Franco M; Kleinschmidt, Georg (2007): An 40Ar-39Ar investigation of the Mertz Glacier area (George V Land, Antarctica): Implications for the Ross Orogen–East Antarctic Craton relationship and Gondwana reconstructions. Precambrian Research, 152(3-4), 93-118 ...