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Early Diagenesis: A Theoretical Approach
Diagenesis refers to changes taking place in sediments after deposition. In a theoretical treatment of early diagenesis, Robert Berner shows how a rigorous development of the mathematical modeling of
Geocarb III: A Revised Model of Atmospheric CO2 over Phanerozoic Time
Revision of the GEOCARB model (Berner, 1991, 1994) for paleolevels of atmospheric CO2, has been made with emphasis on factors affecting CO2 uptake by continental weathering. This includes: (1) new
Sedimentary pyrite formation: An update
Sedimentary pyrite formation during early diagenesis is a major process for controlling the oxygen level of the atmosphere and the sulfate concentration in seawater over geologic time. The amount of
The carbonate-silicate geochemical cycle and its effect on atmospheric carbon dioxide over the past 100 million years
A computer model has been constructed that considers the effects on the CO/sub 2/ level of the atmosphere, and the Ca, Mg, and HCO/sub 3/ levels of the ocean, of the following processes: weathering
GEOCARBSULF: A combined model for Phanerozoic atmospheric O2 and CO2
Abstract A model for the combined long-term cycles of carbon and sulfur has been constructed which combines all the factors modifying weathering and degassing of the GEOCARB III model [Berner R.A.,
Target atmospheric CO2: Where should humanity aim?
Paleoclimate data show that climate sensitivity is ~3 deg-C for doubled CO2, including only fast feedback processes. Equilibrium sensitivity, including slower surface albedo feedbacks, is ~6 deg-C
The role of sedimentary organic matter in bacterial sulfate reduction: The G model tested1
Laboratory study of the bacterial decomposition of Long Island Sound plankton in oxygenated seawater over a period of 2 years shows that the organic material undergoes decomposition via first-order
Degree of Pyritization of Iron as a Paleoenvironmental Indicator of Bottom-Water Oxygenation
ABSTRACT A new method is presented for recognizing the degree of bottom-water oxygenation in organic carbon-bearing rock. The method uses the parameter Degree of Pyritization (DOP), which is the
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