(Table 2) Apatite fission track results from sediment core CRP-3 ...

• Main Author: Fitzgerald, Paul G
• Format: Dataset
• Language: English
• Published: PANGAEA 2001
• Subjects: DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Lithology/composition/facies; Grains, counted/analyzed; Sample comment; Probability, chi-square test; Error, relative; Age, dated; Age, dated standard deviation; Length; Standard deviation; Core wireline system; CRP-3; Sampling/drilling from ice; Cape Roberts Project CRP; Antarc*; Antarctica; antartic*; Victoria Land
• Online Access: https://dx.doi.org/10.1594/pangaea.484981; https://doi.pangaea.de/10.1594/PANGAEA.484981

The Cape Roberts drillhole 3 (CRP-3) on the western edge of the Victoria Land Basin, Antarctica cored through a highly altered igneous intrusion intruded into Paleozoic sedimentary basement. This intrusion was regarded as highly enigmatic as its origin could represent volcanism associated with early rifling of the Victoria Land Basin, later renewed rifting within the Terror rift, or Jurassic tholeiitic magmatism. Direct methods to date the intrusion by U-Pb dating of zircon or fission track analysis failed due to insufficient quantities of these minerals. Apatite fission track (AFT) analysis on the adjacent sedimentary basement, the Devonian Beacon Supergroup sandstone, yielded an age of 101 ± 6 Ma and a mean track length of 12.3 µm with a 1.9 µm standard deviation. The fission tracks were not annealed in the Cenozoic and thus the intrusion must be older than this. This observation, plus race element chemistry of the intrusion suggest it is most likely the same age and original composition as the middle ... : Supplement to: Fitzgerald, Paul G (2001): Apatite fission track ages associated with the altered igneous intrusive in beacon sandstone near the base of CRP-3, Victoria Land Basin, Antarctica. Terra Antartica, 8(4), 585-592 ...