Combining low temperature apatite thermochronology and cosmogenic isotope analysis in quantitative
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Combining low temperature apatite thermochronology and cosmogenic isotope analysis in quantitative landscape evolution studies. Roderick Brown, Hermione Cockburn, Barry Kohn, David Belton, David Fink, Andrew Gleadow and Michael Summerfield. The University of Melbourne

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Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Combining low temperature apatite thermochronology and cosmogenic isotope analysis in quantitativelandscape evolution studies

Roderick Brown, Hermione Cockburn, Barry Kohn, David Belton, David Fink, Andrew Gleadow

and Michael Summerfield

The University of Melbourne

Australian Nuclear Science & Technology Organisation

The University of Edinburgh


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Conceptual landscape cosmogenic isotope analysis in quantitative

evolution models


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

van der Beek et al. (2002) cosmogenic isotope analysis in quantitative

Numerical landscape evolution models


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Numerical landscape evolution models cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Numerical landscape evolution models cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Southern Africa cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Drakensberg Escarpment cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Landsat ETM+ 321RGB Image cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Drakensberg Escarpment, Sani Pass cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Sani Top cosmogenic isotope analysis in quantitative

Photograph by Alastair Fleming


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Apatite Fission Track Age cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Estimated Palaeogeothermal Gradients cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Atlantic Margin, Namibia cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Gamsberg Escarpment, ASTER VNIR Image cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Gamsberg Plateau, ASTER VNIR Image cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Photograph by Hermione Cockburn cosmogenic isotope analysis in quantitative

Gamsberg Escarpment


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Photograph by Hermione Cockburn cosmogenic isotope analysis in quantitative

Gamsberg Escarpment


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Gamsberg Plateau Transect cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Gamsberg Escarpment Transect cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

South Eastern Australia cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

South Eastern Australia, 300m DEM cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Brown Mountain Transect cosmogenic isotope analysis in quantitative

50 km


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Denudation since 110 Ma cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Denudation since 65 Ma cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Apatite U-Th/He Ages cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Paired Apatite FT & He Ages cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Apatite FT & U-Th/He Ages cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Age of continental rifting cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

ANTARES Detector Array, ANSTO, Australia cosmogenic isotope analysis in quantitative


Roderick brown hermione cockburn barry kohn david belton david fink andrew gleadow

Conclusions cosmogenic isotope analysis in quantitative

Combined thermochronologic and cosmogenic datasets are capable of quantifying passive margin escarpment retreat rates

Measured denudation rates and chronologies for the Gamsberg, Drakensberg and Brown Mountain escarpments are incompatible with a steady, parallel retreat model

A viable alternative model involves the establishment of an escarpment at a major inland drainage divide with moderate to low subsequent retreat rates