Investigation of the controls on dune colour in the Namib Sand Sea using mineral magnetic analyses

John Walden, K White

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

The geological and environmental controls upon the pattern of increasing dune redness inland in the Namib Sand Sea are investigated using mineral magnetic measurements, satellite imagery and dithionite extractable iron. Results suggest whole grains or inclusions within grains dominate the iron oxide assemblage but the sediment colour is more strongly influenced by a second component which consists of haematite within the grain coatings. The magnetic data suggest that source materials exert at least a partial control on dune colour in this field setting. Evidence for the influence of other factors (e.g. age and climatic gradient) is also present. (C) 1997 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)187-201
Number of pages15
JournalEarth and Planetary Science Letters
Volume152
Publication statusPublished - Nov 1997

Keywords

  • environmental analysis
  • magnetic properties
  • dunes
  • color
  • Namib Desert
  • iron minerals
  • SIMPSON DESERT
  • AUSTRALIA

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