Tectonic and climatic controls on silicate weathering [rapid communication]

Details Tectonic and climatic controls on silicate weathering [rapid communication] Tectonic and climatic controls on silicate weathering [rapid communication]

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005e%26psl.235..211w&link_type=abstract

Earth and Planetary Science Letters, Volume 235, Issue 1-2, p. 211-228.

Other

49

Scientific paper

Understanding the controls on chemical weathering, especially of silicate minerals, remains a major challenge, despite its importance in controlling the evolution of the Earth's surface. In particular, it has proved hard to distinguish the temperature sensitivity of silicate weathering rates from other factors. Here we present a new compilation of chemical and physical erosion rates in small catchments and show that silicate weathering rates are not governed by any single parameter but require consideration in multiple dimensions. The overall variation in silicate weathering rates with physical erosion rates, rainfall, and temperature can be quantitatively described by a parameterization based on considering their limiting relationships. At lower erosion rates mineral supply limits weathering. At higher erosion rates there is abundant material but kinetic and therefore climatic factors limit weathering. A predictive model describing the field data based on transport and weathering (kinetically) limited scenarios yields theoretically sensible values for fitted parameters. In the transport-limited case, the supply of silicate cations from weathering is directly proportional to the supply of material by erosion, consistent with complete leaching of cations from fresh regolith. In the kinetically limited case, weathering scales directly with runoff, as the square root of erosion rate, and with an activation energy of 74 ± 29 kJ/mol, consistent with expected values in the Earth's surface settings.

Affiliated with

Also associated with

No associations

Rating

Tectonic and climatic controls on silicate weathering [rapid communication] does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Tectonic and climatic controls on silicate weathering [rapid communication], we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tectonic and climatic controls on silicate weathering [rapid communication] will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-872812