Helmholtz Centre Potsdam
GFZ German Research Centre for Geosciences
Abstract (EDOC: 6744)
The evolution at the W margin of the E Antarctic platforms started with a Precambrian flyschoid formation which is overlain discordantly by Middle Cambrian limestones of an epicontinental environment and which leads to continental sedimentation conditions with acid, subsequent volcanic rocks of probably Cambrian age. A coarsely clastic red molasse without volcanic rocks of probably Upper Devonian age follows. The following evolution in Upper Paleozoic with continuation of the platform character is very incomplete. Tillites of probably Carboniferous age and Permian sandstone-siltstone interstratifications with coal intercalations are known. Structurally a historic, disharmonically superimposed stockwork structure can be detected. The processes of metamorphism which are connected with the Beardmore tectonogenesis at the turn of Precambrian/Cambrian took place in the range of the 'very low metamorphism'. With the younger, intraPaleozoic deformations no regional metamorphism is connected. Deformations which are connected with faults are of different character. Here the degree of biotite formation can be reached. -from Current Antarctic Literature
(1982): Gliederung, Bau und Entwicklung des Transantarktischen Gebirges im Bereich der Neptune Range (Antarktis); II, Deformation, Metamorphose und Gesamtentwicklung. Zeitschrift für geologische Wissenschaften, 10, 2, 165-180.