Clay mineralogy of the Cenozoic Pagodroma Group, East Antarctica ...
The Cenozoic Pagodroma Group in the northern Prince Charles Mountains, East Antarctica, is a glaciomarine succession of fjordal character, comprising four uplifted formations of different ages. The composition of the <2 µm fraction of sediments of the Pagodroma Group was analysed in order to help...
| Main Authors: | , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2003
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.736666 https://doi.pangaea.de/10.1594/PANGAEA.736666 |
| Summary: | The Cenozoic Pagodroma Group in the northern Prince Charles Mountains, East Antarctica, is a glaciomarine succession of fjordal character, comprising four uplifted formations of different ages. The composition of the <2 µm fraction of sediments of the Pagodroma Group was analysed in order to help identify source areas, past weathering conditions and glacial regimes. Both clay and non-clay minerals have been quantified.The assemblage of the upper Oligocene to lower Miocene Mount Johnston Formation is characterised by the dominance of illite and intermediate concentrations of chlorite. Similar to that assemblage is the clay mineral suite of the middle Miocene Fisher Bench Formation, where illite and chlorite together account for 95% of the clay minerals. The middle to upper Miocene Battye Glacier Formation is the only formation with significant and persistent smectite concentrations, although illite is still dominant. The kaolinite concentration is also high and is even higher than that of chlorite. The ... : Supplement to: Ehrmann, Werner; Bloemendal, Jan; Hambrey, Mike J; McKelvey, Barrie C; Whitehead, Jason M (2003): Variations in the composition of the clay fraction of the Cenozoic Pagodroma Group, East Antarctica: implications for determining provenance. Sedimentary Geology, 161(1-2), 131-152 ... |
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