Tag

Mantle Chemistry

All articles tagged with #mantle chemistry

"Unveiling Earth's Ancient Breath: Startling Revelations from New Research"
earth-science2 years ago

"Unveiling Earth's Ancient Breath: Startling Revelations from New Research"

New research has revealed a link between ancient atmospheric shifts and the chemistry of Earth's mantle, providing insights into the planet's evolution. The study focused on the Great Oxidation Event (GOE), a period when oxygen levels in Earth's atmosphere rapidly increased, and investigated magmas formed in ancient subduction zones. The findings suggest that sediment recycling played a crucial role in providing atmospheric access to the mantle, leading to increased oxidation of magma and altering the composition of the continental crust. This discovery sheds light on the relationship between Earth's external and internal reservoirs and raises questions about the role of oxygen in shaping the planet's history and the conditions for life.

Unveiling the Connection: Oxygen in Earth's Atmosphere and Mantle Chemistry
earth-science2 years ago

Unveiling the Connection: Oxygen in Earth's Atmosphere and Mantle Chemistry

A study has revealed a crucial link between Earth's deep mantle chemistry and its early atmosphere, shedding light on the evolution of life on our planet and the surge of atmospheric oxygen. By examining magmas formed in ancient subduction zones, the researchers found a transition from reduced to more oxidized magmas after the Great Oxidation Event (GOE) around 2.1 to 2.4 billion years ago. This shift was due to the deep subduction of oxidized sediments, enabling the atmosphere to access the mantle. The findings have implications for understanding the composition of the continental crust, ore formation, and the conditions that set the stage for life on Earth.

Unveiling the Link: Earth's Atmosphere and Mantle Chemistry Interconnected
earth-science2 years ago

Unveiling the Link: Earth's Atmosphere and Mantle Chemistry Interconnected

A new study led by researchers at the University of Portsmouth and University of Montpellier has revealed a connection between Earth's early atmosphere and the chemistry of its deep mantle. By investigating magmas formed in ancient subduction zones during the Great Oxidation Event (GOE), the team found that sediment recycling provided atmospheric access to the mantle, leading to increased oxidation of magma and altering the composition of the continental crust. The research sheds light on the evolution of life on Earth and the relationship between Earth's external and internal reservoirs.