Thursday, June 24, 2021

New Research Uncovers the Two ‘Faces’ of the Earth

New Curtin University-led research has uncovered how rocks sourced from the Earth’s mantle are linked to the formation and breakup of supercontinents and super oceans over the past 700 million years, suggesting that the Earth is made up of two distinct “faces.” The research, published in the leading journal Nature Geoscience, examined the chemical and isotopic “make-up” of rocks sourced from thousands of kilometers below the surface to better understand how the Earth’s mantle responds to plate movements that occur near its surface.

New Curtin University-led research has uncovered how rocks sourced from the Earth’s mantle are linked to the formation and breakup of supercontinents and super oceans over the past 700 million years, suggesting that the Earth is made up of two distinct ‘faces’. (Image: via pixabay / CC0 1.0)
New Curtin University-led research has uncovered how rocks sourced from the Earth’s mantle are linked to the formation and breakup of supercontinents and super oceans over the past 700 million years, suggesting that the Earth is made up of two distinct ‘faces.’ (Image: via pixabay / CC0 1.0)

Lead author Dr. Luc-Serge Doucet, from the Earth Dynamics Research Group in Curtin’s School of Earth and Planetary Sciences, said the Earth’s mantle is currently divided into two main domains — African and the Pacific — but little is known about their formation and history, and they are commonly assumed to be chemically the same, adding:

The team found that the contents of the two mantle domains are not exactly the same as previously thought. Instead, the Earth appears to have two chemically distinct hemispheric “faces,” with the Pacific ring of fire being the surface expression of the boundary between the two. Co-author John Curtin Distinguished Professor Zheng Xiang Li, head of the Earth Dynamics Research Group, said the two chemically distinct hemispheres discovered by the team can best be explained by the distinct evolutionary histories of the two mantle domains during the Rodinia to Pangaea supercontinent cycles, adding:

Provided by:  [Note: Materials may be edited for content and length.]

Follow us on Twitter or subscribe to our email list

Troy Oakes
Troy was born and raised in Australia and has always wanted to know why and how things work, which led him to his love for science. He is a professional photographer and enjoys taking pictures of Australia's beautiful landscapes. He is also a professional storm chaser where he currently lives in Hervey Bay, Australia.
355FansLike
8,788FollowersFollow
2,313FollowersFollow

Subscribe to our newsletter

Latest

The Secret of Shanxi Merchants’ Domination of Chinese Business World for 500 Years

Jin is an abbreviated name for the Provence of Shanxi in China,  So here, "Shanxi merchants," otherwise known as...

More Articles Like This