Geochemistry of selected Ferrar samples from Northern Victoria Land and George V Land during GANOVEX VIII ...

• Main Authors: Hanemann, Ricarda, Viereck-Götte, Lothar
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2004
• Subjects: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Antarctica; antartic*; George V Land; Sea ice; Victoria Land
• Online Access: https://dx.doi.org/10.1594/pangaea.848056; https://doi.pangaea.de/10.1594/PANGAEA.848056

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 ...