Pulse of Intense Oxidative Weathering During the Latest Paleoproterozoic

Earth Sciences, Geochemistry, Geology, Geochemistry,
oxidative weathering   Paleoproterozoic   black shales   copper isotopes   atmospheric oxygen   Columbia supercontinent   oceanic anoxia  

Research Report on the Pulse of Intense Oxidative Weathering During the Latest Paleoproterozoic Academic Background The level of atmospheric oxygen on Earth has a profound impact on the ecology and biogeochemical functioning of marine ecosystems. The Great Oxidation Event (GOE), which occurred approximately 2.5 to 2.2 billion years ago, marked a si...

Intensified Continental Weathering and Reductive Surface Runoff During the Triassic–Jurassic Transition

Earth Sciences, Geochemistry, Geology, Geochemistry,
Triassic-Jurassic transition   continental weathering   reductive runoff   iron isotopes   zinc isotopes   chemical index of alteration   biochar  

Study on Continental Weathering and Reductive Surface Runoff During the Triassic-Jurassic Transition Academic Background The Triassic-Jurassic Transition (TJT) marks one of the most significant mass extinction events in Earth’s history, known as the End-Triassic Extinction (ETE). This event led to a widespread decline in biodiversity across both ma...

Mantle Oxidation by Sulfur Drives the Formation of Giant Gold Deposits in Subduction Zones

Earth Sciences, Geochemistry, Engineering, Mining and Metallurgical Engineering,
sulfur oxidation   subduction zone   gold deposits   mantle wedge   sulfur ligand  

Mantle Oxidation by Sulfur Drives the Formation of Giant Gold Deposits in Subduction Zones Academic Background Most of Earth’s metal resources are concentrated in magmatic arc environments, and subduction zones are the primary regions for mass exchange between the mantle and crust. Fluids released from subducting slabs are believed to oxidize the o...