Hanemann, Ricarda; Viereck-Götte, Lothar (2004): Geochemistry of selected Ferrar samples from Northern Victoria Land and George V Land during GANOVEX VIII [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.848056, Supplement to: Hanemann, R; Viereck-Götte, L (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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Abstract:
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 variations within the low-Ti series, caused by in-situ differentiation, increase towards the Wilson-Bowers Terrane boundary, possibly displaying the asymmetrical distribution of outcrops over this area. Absence of Ferrar occurrences east of the Bowers Terrane remains a matter of palaeo-geodynamic discussion. Besides, the secondary mineralogy of extrusives from Litell Rocks and Monument Nunataks exhibits noticeable differences, which indicates an elevated thermal gradient in the vicinity of Litell Rocks compared to Monument Nunataks during the Cretaceous.
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Median Latitude: -71.005497 * Median Longitude: 159.509945 * South-bound Latitude: -72.700000 * West-bound Longitude: 149.751670 * North-bound Latitude: -68.351670 * East-bound Longitude: 164.810000
Date/Time Start: 1999-12-11T00:00:00 * Date/Time End: 2000-02-26T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Hanemann, R; Viereck-Götte, L (2004): (Table 3) Major and trace element abundances of representative Ferrar samples from Northern Victoria Land and George V Land. https://doi.org/10.1594/PANGAEA.848054
- Hanemann, R; Viereck-Götte, L (2004): (Table 2b) Representative analyses of plagioclase of selected Ferrar intrusives from Northern Victoria Land and George V Land. https://doi.org/10.1594/PANGAEA.848053
- Hanemann, R; Viereck-Götte, L (2004): (Table 2a) Representative analyses of Ca-poor and Ca-rich pyroxenes of selected Ferrar intrusives from Northern Victoria Land and George V Land. https://doi.org/10.1594/PANGAEA.848051
- Hanemann, R; Viereck-Götte, L (2004): (Table 4) Rare earth element abundances of representative Ferrar samples from Northern Victoria Land. https://doi.org/10.1594/PANGAEA.848055