Comments on the BLAG model; The carbonate-silicate geochemical cycle and its effect on atmospheric carbon dioxide over the past 100 million years

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ID: 293995
1984
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Abstract
A self-consistent method of determining initial conditions for the model presented by Berner, Lasaga, and Garrels (1983) (henceforth, the BLAG model) is derived, based on the assumption that the CO2 geochemical cycle was in steady state at t = -100 my (million years). This initialization procedure leads to a dissolved magnesium concentration higher than that calculated by Berner, Lasaga, and Garrels and to a low ratio of dissolved calcium to bicarbonate prior to 60 my ago. The latter prediction conflicts with the geologic record of evaporite deposits, which requires that this ratio remain greater than 0.5. The contradiction is probably caused by oversimplifications in the BLAG model, such as the neglect of the cycles of organic carbon and sulfur.
Reference Key
openalex_W1995630583 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors J. F. Kasting
Journal american journal of science
Year 1984
DOI
10.2475/ajs.284.10.1175
URL
https://doi.org/10.2475/ajs.284.10.1175
Keywords Keywords not found

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