Pedogenic uranium/thorium and thermoluminescence chronologies and evolutionary history of a coastal dunefield, Groote Eylandt, northern Australia

Shulmeister, J, Short, SA, Price, DM and Murray, AS (1993) Pedogenic uranium/thorium and thermoluminescence chronologies and evolutionary history of a coastal dunefield, Groote Eylandt, northern Australia. Geomorphology, 8 1: 47-64. doi:10.1016/0169-555X(93)90003-K


Author Shulmeister, J
Short, SA
Price, DM
Murray, AS
Title Pedogenic uranium/thorium and thermoluminescence chronologies and evolutionary history of a coastal dunefield, Groote Eylandt, northern Australia
Journal name Geomorphology   Check publisher's open access policy
ISSN 0169-555X
Publication date 1993
Sub-type Article (original research)
DOI 10.1016/0169-555X(93)90003-K
Volume 8
Issue 1
Start page 47
End page 64
Total pages 18
Language eng
Abstract U/Th disequilibrium dating of pedogenic ferruginous pisoliths and additional coarse fraction quartz thermoluminescense dates are used to test a TL-based chronology of the Umbakumba Dunefield, Groote Eylandt, northern Australia. These dates support the established history of the dunefield and indicate that the field is at least mid-Quaternary in age and may be much older. Sea-level fluctuation is identified as the dominant control on dunefield accretion and destruction. The following model of sea-level control of dunefield evolution is proposed: (1) At sea-levels of less than -40 m the system is inactive. (2) From -40 to -5 m the system is accretionary. (3) At sea-levels from -5 m to +5 m the system is deflationary. (4) Above +5 m,the dunefield would be destroyed. Modified versions of the conceptual model may be applicable to other coastlines where sediment supply is significantly altered by sea-level fluctuations.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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