Climate-driven flushing of pore water in peatlands

Article Abstract:

Long-term alterations in hydrology, caused by climate fluctuations, affect the flow of dissolved organic matter and nutrients in the deeper peat of the Northern peatlands. Direct changes in the rates of fermentation and methanogenesis result from these alterations as do changes in the rate of dissolved organic compound export. The variation in the pore water chemistry is observed after a continuous drought period of 3 to 5 years. The groundwater flow through the peat is temporarily affected by the climate variations of short range.

Observations, Fermentation, Carbon cycle (Biogeochemistry), Carbon cycle

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A little rain must fall

Article Abstract:

Borehole research in Alaska indicates that groundwater flow affects the accumulation of sedimentary basins, the distribution of metalliferous ore deposits and the secondary migration of petroleum. D. Deming and colleagues obtained these results by examining borehole material collected between the Brooks Range mountains and Prudhoe Bay on the northern coast from 1977 to 1984. The discovery that groundwater is moving heat and minerals through aquifers to Alaska's northern regions has economic and geochemical significance.

Natural history, Alaska, Ore deposits

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Mantle chemistry goes back into the melting pot

Article Abstract:

The findings regarding the changes in silicate melts will be significant for the study of earth and other planets. At high temperatures, ions of cobalt and nickel transform their coordination in silicate melts from octahedral to tetrahedral, according to studies conducted by Keppler and Rubie. At lower temperatures, cobalt and nickel crystallize into olivine, a major constituent of the Earth's upper mantle.

Origin, Planet formation

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