Antarctica: Contributions to Global Earth Sciences by Dieter K. Fütterer, Detlef Damaske, Georg Kleinschmidt,

By Dieter K. Fütterer, Detlef Damaske, Georg Kleinschmidt, Hubert Miller, Franz Tessensohn

Sixty articles prepared in 8 thematic sections discuss with most up-to-date geological and geophysical result of Antarctic learn. The Precambrian of the East Antarctic safeguard and its geological background is taken into account in addition to sub-ice topography, geophysics and stratigraphy, sedimentology and geophysics of the encircling Southern Ocean. specific emphasis is given to the relationship of the Antarctic and the encompassing continents while forming a part of Gondwana.

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Antarctica: Contributions to Global Earth Sciences

Sixty articles prepared in 8 thematic sections confer with most up-to-date geological and geophysical result of Antarctic study. The Precambrian of the East Antarctic protect and its geological background is taken into account in addition to sub-ice topography, geophysics and stratigraphy, sedimentology and geophysics of the encircling Southern Ocean.

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Raine. It had an electrical resistance of 66 kΩ, when the vertical distance against the meta-BIF strike was 60 cm. 210' S, 50°057' E) A single meta-BIF layer (maximum thickness 3 m) extending 20 m in a NW-SE direction, as a convex lens, running into garnet-rich felsic gneiss. Both sides of the layer gradually changed to ultramafic meta-orthopyroxenite with internal folding. The layer continued in a NE direction beyond the ridge. 474' E) To identify the rock type which is causing the large magnetic anomaly, meta-BIF and dolerite dikes were surveyed around the intersections between the lineation of anomaly and outcrops.

Riiser-Larsen area consists of metamorphic rocks and unmetamorhosed dolerite intrusions. Ishikawa (2000) summarized geological structures (Fig. 1-1) based on their field and laboratory researches as follows. The metamorphic rocks are divided into the layered gneiss series, occurring in the central to northwestern part of this area, and massive gneiss series in the southern to southeastern part. The layered gneiss is characterized by a layered structure composed of garnet pelitic and mafic gneiss, impure quartzite and metamorphosed banded iron formation (meta-BIF).

Kawasaki and Sato (2002) evaluated the peak metamorphic temperatures of granulites as 925 °C for SP 92011102A and 1 039 °C for SP 93010601-X using the new orthopyroxene-garnet geothermometer (Kawasaki and Motoyoshi 2000). The orthopyroxene-sapphirine thermometer (Kawasaki and Sato 2002) indicated these granulites experienced the subsequent retrograde metamorphism at 824 °C and 1 010 °C, respectively. In this paper we present the experimental data on the phase relations of the sillimanite-cordierite-sapphirine granulite (SP 92011102A) described by Kawasaki et al.

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