Biologically mediated silicification of marine cyanobacteria and implications for the Proterozoic fossil record
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DOI: 10.1130/g47394.1
Abstract: Silicification was a major mode of fossilization in Proterozoic peritidal environments, but marine silica concentrations and the chemical and biological mechanisms that drove microbial silicification and formation of early diagenetic chert in these environments remain… read more here.
Keywords: marine cyanobacteria; silicification; fossil; mediated silicification ... See more keywords
Mineralogy and Geochemistry of Biologically-Mediated Gold Mobilisation and Redeposition in a Semiarid Climate, Southern New Zealand
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DOI: 10.3390/min7080147
Abstract: Detrital gold in Late Pleistocene-Holocene placers has been chemically mobilised and redeposited at the micron scale by biologically-mediated reactions in groundwater. These processes have been occurring in a tectonically active semiarid rain shadow zone of… read more here.
Keywords: mineralogy; new zealand; geochemistry; gold ... See more keywords