December GEOLOGY and GSA TODAY media ...(ean productivity and Sr/Ba in barite acr...)
ean productivity, and Sr/Ba in barite across the PaleoceneEocene Thermal Maximum
Adina Paytan et al., University of California-Santa Cruz, Institute of Marine Science, Santa Cruz, California 95064, USA. Pages 1139-1142.
55 million years ago, Earth went through a period of extreme global warming caused by rapid emission of greenhouse gases. It is unknown what ended this episode of greenhouse warming. Paytan et al. use the record of barite accumulation to show that high oceanic productivity over thousands of years was a factor in ending this warm period, by carbon removal from the atmosphere to the deep ocean. The chemical characteristics of barite indicate that records the water column productivity conditions, and not other unrelated processes.
Rapid fluid-rock interaction in oilfield reservoirs
Stephanie Houston et al., University of Leeds, Earth Sciences, Leeds, UK. Pages 1143-1146.
Important chemical reactions between water and rock in oilfield reservoirs can occur on a timescale of months. Seawater injection into a North Sea oilfield caused rapid reactions involving sulfate, carbonate, and especially silicate minerals. Houston et al.s study indicates that CO2 injected into similar mature oilfields is likely to react with host pore-waters and rocks on a human timescale. This evidence greatly affects the safety case for CO2 storage (and sequestration) in oilfield reservoirs.
GSA TODAY Science Article
Earth history along Colorados Front Range: Salvaging geologic data in the suburbs and sharing it with the citizens
Robert G. Raynolds et al., Denver Museum of Nature & Science, Denver, Colorado, 80205, USA
What can past changes of climate teach us about the current warming of the Earth" In a recent GSA Today article, Bob Raynolds and his colleagues at the Denver Museum of Nature & Science described their research, which involved the mobilization of an army of volunteers,
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| Contact: Ann Cairns acairns@geosociety.org 303-357-1056 Geological Society of America Source:Eurekalert |
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