Geochemistry of selected Ferrar samples from Northern Victoria Land and George V Land during GANOVEX VIII ...
Newly sampled basaltic andesites and andesites from the tholeiitic Ferrar Supergroup of northern Victoria Land and George V Land, Antarctica, are attributed to the known low-Ti and high-Ti series. Aside from known sparsely distributed high-Ti extrusives, a high-Ti sill was found in the Alamein Range...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2004
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.848056 https://doi.pangaea.de/10.1594/PANGAEA.848056 |
| Summary: | Newly sampled basaltic andesites and andesites from the tholeiitic Ferrar Supergroup of northern Victoria Land and George V Land, Antarctica, are attributed to the known low-Ti and high-Ti series. Aside from known sparsely distributed high-Ti extrusives, a high-Ti sill was found in the Alamein Range outside the Rennick Graben. Low-Ti lavas, sills and dikes display wide petrographical, mineral and geochemical variations, reflecting extensive in-situ differentiation. High-Ti rocks from Litell Rocks are homogeneous with respect to mineralogy and geochemistry, minor deviations are shown by the sampled sill. Chilled margins of low-Ti sills, dikes and lava flows exhibit nearly constant bulk-rock chemistry (mg# ~60) within the studied area. Compared to chilled margins from Tasmanian sills, the striking uniformity of the pre-emplacement chemistry of Ferrar magmas over large distances supports the magma transport model of Elliot et al. (1999, doi:10.1016/S0012-821X(99)00023-0). In the area investigated, compositional ... : Supplement to: Hanemann, Ricarda; Viereck-Götte, Lothar (2004): Geochemistry of jurassic Ferrar lava flows, sills and dikes sampled during the Joint German-Italian Antarctic Expedition 1999/2000. Terra Antartica, 11(1), 39-54 ... |
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