Molybdenum isotope fractionation in glacial diamictites tracks the onset of oxidative weathering of the continental crust
Abstract
Molybdenum isotopes in twenty-four composites of glacial diamictites spanning depositional ages of 2900 to 300 Ma show a systematic shift to lighter compositions and a decrease in Mo concentration over time. The diamictites fall into three age groups relative to the Great Oxidation Event (GOE): pre-GOE (2.43 – 2.90 Ga), syn-GOE (2.20 – 2.39 Ga), and post-GOE (0.33 – 0.75 Ga). Pre-GOE composites have an average δ98MoNIST3134 of +0.03‰ (± 0.18‰),...
Paper Details
Title
Molybdenum isotope fractionation in glacial diamictites tracks the onset of oxidative weathering of the continental crust
Published Date
Mar 1, 2020
Volume
534
Pages
116083 - 116083
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