DENUDATION RATES DETERMINED FROM THE ACCUMULATION OF IN SITU-PRODUCEDBE-10 IN THE LUQUILLO EXPERIMENTAL FOREST, PUERTO-RICO

Citation
Et. Brown et al., DENUDATION RATES DETERMINED FROM THE ACCUMULATION OF IN SITU-PRODUCEDBE-10 IN THE LUQUILLO EXPERIMENTAL FOREST, PUERTO-RICO, Earth and planetary science letters, 129(1-4), 1995, pp. 193-202
Citations number
28
Categorie Soggetti
Geosciences, Interdisciplinary
ISSN journal
0012821X
Volume
129
Issue
1-4
Year of publication
1995
Pages
193 - 202
Database
ISI
SICI code
0012-821X(1995)129:1-4<193:DRDFTA>2.0.ZU;2-E
Abstract
We present a simple method for estimation of long-term mean denudation rates using in situ-produced cosmogenic Be-10 in fluvial sediments. P rocedures are discussed to account for the effects of soil bioturbatio n, mass wasting and attenuation of cosmic rays by biomass and by local topography. Our analyses of Be-10 in quartz from bedrock outcrops, so ils, mass-wasting sites and riverine sediment from the Icacos River ba sin in the Luquillo Experimental Forest, Puerto Rico, are used to char acterize denudation for major landform elements in that basin. The Be- 10 concentration of a discharge-weighted average of size classes of ri ver sediment corresponds to a long-term average denudation of approxim ate to 43 m Ma(-1), consistent with mass balance results.