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Victoria University Antarctic Research Expedition Science and Logistics Reports 1974-75: VUWAE 19

Basal Beacon Studies

Basal Beacon Studies

  1. Twenty-one stratigraphic sections/were measured between the Royal Society and Olympus Ranges. Detailed sampling for mechanical and chemical analysis was performed at each locality.

    An important section at New Mountain was measured to near the top of the Beacon Heights Orthoquartzite.

  2. Nearly 600 paleocurrent measurements were taken on appropriate structures within the New Mountain Sandstone. Detailed statistical analysis of this data will show any lateral and vertical changes in transport direction within the New Mountain Sandstone.page 13
  3. Detailed sampling of the Terra Cotta Siltstone Member was performed. It will now be possible to carry out detailed major and trace element chemistry of the red- and green-colour and Terra Cotta Siltstone.
  4. The stratigraphic position of the Boreas Subgreywacke Member was established at Plane Table in the Asgard Range. It was also established that the unit does not represent a tillite.
  5. A previously unknown basement contact on Mt. Jason was observed. This extends the known areal distribution of the Windy Gully Sandstone and the Terra Cotta Siltstone northward to the Olympus Range.
  6. Preliminary detailed work was carried on the Altar Mountain Formation. A section was measured and samples taken from four localities.
  7. The Heimdall Erosion Surface was observed on Table Mountain where it had not been previously noted.
  8. Evidence for major rafting by dolerite sills was found at New Mountain. Previously the sill was thought to split the Terra Cotta Siltstone. It was established that in fact the whole of New Mountain has been rafted 3 km to the west by the peneplain sill.
  9. Samples of basement granites were taken for radiometric dating. Samples were taken from the basement contact at New Mountain, Mount JJ Thompson in the Taylor Valley and Mount Odin in the Wright Valley.