منابع مشابه
Geology: The need for mass balance and feedback in the geochemical carbon cycle; discussion and reply
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متن کاملGlobal geochemical cycles of carbon, sulfur and oxygen.
Time resolved data on the carbon isotopic composition of carbonate minerals and the sulfur isotopic composition or sulfate minerals show a strong negative correlation during the Cretaceous. Carbonate minerals are isotopically heavy during this period while sulfate minerals are isotopically light. The implication is that carbon is being transferred from the oxidized, carbonate reservoir to the r...
متن کاملGeochemical detection of carbon dioxide in dilute aquifers
BACKGROUND Carbon storage in deep saline reservoirs has the potential to lower the amount of CO2 emitted to the atmosphere and to mitigate global warming. Leakage back to the atmosphere through abandoned wells and along faults would reduce the efficiency of carbon storage, possibly leading to health and ecological hazards at the ground surface, and possibly impacting water quality of near-surfa...
متن کاملThe Iron Biogeochemical Cycle Past and Present: A Geochemical Perspective
Our understanding of the complex aqueous chemistry of iron in natural systems has advanced significantly over recent years. Here we will highlight how new contributions from nanogeoscience combine with conventional aqueous geochemistry to provide a novel view of kinetics in the modern iron biogeochemical cycle, and the evolution of the iron cycle through geologic time. We start by considering t...
متن کاملEuropeanglacial dust deposits: Geochemical constraints on atmospheric dust cycle modeling
For a long time global paleodust numerical simulations have greatly underestimated dust sources other than modern deserts. Recent modeling experiments incorporating glaciogenic sources of dust have positively improved the agreement between model and paleodust data. This highlights the importance of accurately representing all areas potentially subjected to deflation during an investigated inter...
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ژورنال
عنوان ژورنال: Journal of Geography (Chigaku Zasshi)
سال: 1993
ISSN: 0022-135X,1884-0884
DOI: 10.5026/jgeography.102.6_664