Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004e%26psl.222..645b&link_type=abstract
Earth and Planetary Science Letters, Volume 222, Issue 2, p. 645-651.
Physics
1
Cosmogenic Nuclides, Erosion, Stone-Line, Creeping Rate
Scientific paper
Concentrations of in situ-produced cosmogenic 10Be (T1/2=1.5 Myr) were measured in quartz samples from a quartz vein and its connected stone line from the Jardim River basin, Distrito Federal, Brazil, in order to quantify the processes involved in the landscape evolution of that region. The exponential decrease of the 10Be concentrations along the quartz vein, as well as their systematic increase along the stone-line away from the quartz vein, suggests an autochthonous development. Two models allow to estimate the lateral displacement rate. A plugs model assuming that the sample depth, and hence the production rate, is constant, and a burial model assuming that the sample depth, and hence the production rate, varies through time, yield lateral displacement rate of 37+/-5 and 68+/-6 m Myr-1, respectively.
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Assad L. L. M.
Bourlès Didier Louis
Braucher Régis
Gaspar J. C.
Lima C. V.
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