Author/Authors :
Golden، نويسنده , , Joshua and McMillan، نويسنده , , Melissa and Downs، نويسنده , , Robert T. and Hystad، نويسنده , , Grethe and Goldstein، نويسنده , , Ian and Stein، نويسنده , , Holly J. and Zimmerman، نويسنده , , Aaron and Sverjensky، نويسنده , , Dimitri A. and Armstrong، نويسنده , , John T. and Hazen، نويسنده , , Robert M.، نويسنده ,
Abstract :
Temporal trends in Earthʹs near-surface mineralogy correlate with major events in Earthʹs geochemical and tectonic history. New and published analyses of 422 molybdenite (MoS2) specimens from 135 localities with known ages from 2.91 billion years (Ga) to 6.3 million years (Ma) reveal two statistically significant trends. First, systematic increases in average and maximum trace concentrations of Re in molybdenite since 3.0 Ga point to enhanced oxidative weathering by subsurface fluids. In addition, episodic molybdenum mineralization correlates with five intervals of supercontinent assembly from ∼2.7 Ga (Kenorland) to 300 Ma (Pangaea).
Keywords :
rhenium , Great oxidation event , Supercontinent cycle , molybdenite , Mineral evolution
