geochemistry

A Planning Meeting of the Metal Earth Project in Canada Brings Together Both Current and Former DTM Scientists

Metal Earth

From June 14 to 17, 2017, postdoctoral associate Jesse Reimink and staff scientist Steve Shirey joined former postdoc Graham Pearson (now at the University of Alberta) and former predoctoral fellow Michael Hamilton (now at the Jack Satterly Geochronology Lab of the Royal Ontario Museum in Sudbury, Ontario) for a planning meeting for the 'Metal Earth' project.

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Earth's First Example of Recycling—Its Own Crust!

Richard Carlson

Rock samples from northeastern Canada retain chemical signals that help explain what Earth’s crust was like more than 4 billion years ago, reveals new work from DTM’s Richard Carlson and Jonathan O’Neil of the University of Ottawa. Their work is published by Science.  

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Melting Temperature of Earth’s Mantle Depends on Water

Erik Hauri

A joint study between Carnegie and the Woods Hole Oceanographic Institution has determined that the average temperature of Earth’s mantle beneath ocean basins is about 110 degrees Fahrenheit (60 Celsius) higher than previously thought, due to water present in deep minerals. The results are published in Science.

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Postdoc Spotlight: Geochemist Jesse Reimink

Jesse Reimink

Jesse Reimink has been around science and the outdoors his entire life. His father, a high school biology teacher, would keep him and his sister busy searching for rocks and insects outside for their collections. Today, as a postdoctoral associate at DTM, his rock collection has grown exponentially. This summer, he collected over 1200-pounds worth of samples from the Slave craton, a block of rocks in north-western Canada that has preserved a lot of old rocks ranging in age from 4 billion to 2.5 billion years old.

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Deep Mantle Chemistry Surprise: Carbon Content Not Uniform

Marion le Voyer

Even though carbon is one of the most abundant elements on Earth, it is actually very difficult to determine how much of it exists below the surface in Earth’s interior. Analysis by Carnegie’s Marion Le Voyer and Erik Hauri of crystals containing completely enclosed mantle magma with its original carbon content preserved has doubled the world’s known finds of mantle carbon. The findings are published in Nature Communications.

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Biggest and best diamonds formed in deep mantle metallic liquid

Steven Shirey

New research from a team including Carnegie’s Steven Shirey, Jianhua Wang, and Emma Bullock explains how the world’s biggest and most valuable diamonds formed—from metallic liquid deep inside Earth’s mantle. The findings are published in Science.

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