Abstract
The Mesoarchaean Tasiusarsuaq terrane in southern West Greenland consists of TTG gneisses, and, locally, supracrustal rocks that were metamorphosed to medium-pressure granulite facies conditions at ca. 2.8 Ga. Typical mineral assemblages in mafic granulites are clinopyroxene + orthopyroxene + plagioclase + quartz + hornblende ± garnet, and quartz + plagioclase + clinopyroxene + orthopyroxene + biotite in TTG gneisses. The peak of metamorphism has been estimated at ca. 750-800°C and 8-10 kbar, and was followed by locally extensive amphibolite-facies retrogression, most notably in a several km-wide zones at the northern margin of the terrane.
| Original language | English |
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| Article number | EGU2011-10042-1 |
| Number of pages | 2 |
| Journal | Geophysical Research Abstracts |
| Volume | 13 |
| Publication status | Published - 2011 |
| Event | EGU General Assembly 2011 - Vienna, Austria Duration: 3 Apr 2011 → 8 Apr 2011 |
Programme Area
- Programme Area 4: Mineral Resources