Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 3 of 3 for “"Atmospheric oxygenation"”.
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Weathering Pathways and Limitations in Biogeochemical Models: Application to Earth System Evolution
… imposed by geological proxies. A mechanism for atmospheric oxygenation over Earth history is proposed: the combination of declining mantle heat flux and increasing continental area, aided by colonising land biota, results in a steadily increasing ocean nutrient supply, driving increasing rates …
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The Neoproterozoic São Francisco Basin, central Brazil: tectonic evolution, paleoclimate, and mineral systems
… photosynthetic oxygen, and contribute to atmospheric oxygenation. Combined analysis of modern analogs, paleogeographic reconstructions, global 87Sr/86Sr values, chemistry of Ediacaran zircons, and clay mineralogy support this interpretation. The revised stratigraphy of the SFB consolidates …
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Tellurium, antimony, and selenium isotopes as indicators of elemental mobility
… mobility, resource extraction, or the oxygenation of early Earth. Stable isotopic fractionation of redox-sensitive elements can be used as a means to identify redox reactions taking place. For example, selenium (Se) isotopes track reductive immobilization of the contaminant Se in …