Investigation of a diabase-derived regolith profile from Pennsylvania: Mineralogy, chemistry and Fe isotope fractionation
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چکیده
منابع مشابه
Three Isotope Method Determination of the Equilibrium Fe Isotope Fractionation between Aqueous Fe(ii) and Goethite
FRACTIONATION BETWEEN AQUEOUS FE(II) AND GOETHITE. B. L. Beard and R. Handler, M. M. Scherer, L. Wu, A. D. Czaja, A. Heimann, C. M. Johnson Department of Geosciences, 1215 W. Dayton Street, University of Wisconsin, Madison, WI 53706, USA, NASA Astrobiology Institute, University of Wisconsin, 3 Dept of Civil and Environmental Engineering, The University of Iowa, 4126 Seamans Center for the Engin...
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The iron isotope composition of sedimentary pyrite has been proposed as a potential proxy to trace microbial metabolism and the redox evolution of the oceans. We demonstrate that Fe isotope fractionation accompanies abiotic pyrite formation in the absence of Fe(II) redox change. Combined fractionation factors between Fe(II)(aq), mackinawite, and pyrite permit the generation of pyrite with Fe is...
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Growth of Methanogens on Different Mars Regolith Analogues and Stable Carbon Isotope Fractionation during Methanogenesis
Introduction: The detection of methane in the Martian atmosphere (1-4) and the probability of the existence of liquid water during the early history of Mars (5-10) prompted enthusiasm about plausible life forms on Mars. The half-life of methane in a planetary atmosphere is about 300 years (11), so in order to be detected on Mars, methane would need to be replenished continuously. Several potent...
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Introduction: Basic knowledge about the composition and structure of the Moon was provided by the space missions of the USSR (Luna since 1959) and USA (Ranger and Surveyor since 1964). In particular Apollo missions 11 to 17 (1969-1972) with ca. 2200 samples (380 kg) gave new highlights and understandings for the geological research of our neighbor. Additional material was sampled by the Russian...
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ژورنال
عنوان ژورنال: Geoderma
سال: 2016
ISSN: 0016-7061
DOI: 10.1016/j.geoderma.2016.03.004