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Washington, D.C.— Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials from the early Earth’s crust. But decisive evidence for this phenomenon has proven elusive. New research from a team including Carnegie’s Erik Hauri demonstrates that oceanic volcanic rocks contain samples of recycled crust dating back to the Archean era 2.5 billion years ago. Their work is published in Nature.
This indicates that the sulfur comes from a deep mantle reservoir containing crustal material subducted before the Great Oxidation Event and preserved for over half the age of the Earth.
“These measurements place the first firm age estimates of recycled material in oceanic hotspots,” Hauri said. “They confirm the cycling of sulfur from the atmosphere and oceans into mantle and ultimately back to the surface,” Hauri said.
Caption: Sulfur isotopes within iron sulfide inclusions in volcanic rocks, like this one from Iceland, demonstrate that sulfur derived from the Earth's ancient atmosphere was preserved within the mantle for at least 2.54 billion years before coming back to the surface in eruptions at Mangaia volcano, South Pacific Ocean. Sulfide inclusion is 50 µm in diameter, light gray mineral in lower-left is olivine, darker-gray material surrounding inclusion is volcanic glass.
Originally posted by solve
reply to post by Trueman
interesting,, i wonder if the baltic anomaly could be useful in this kind of research,
especially because its relatively young...
Originally posted by Trueman
I don't know why I feel this one could be considered vital information one day.
Washington, D.C.— Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials from the early Earth’s crust. But decisive evidence for this phenomenon has proven elusive. New research from a team including Carnegie’s Erik Hauri demonstrates that oceanic volcanic rocks contain samples of recycled crust dating back to the Archean era 2.5 billion years ago. Their work is published in Nature.
Wonder what a similar future investigation on Mars could reveal to us. Can this information lead us to a future procedure, to induce a manmade enviroment in other worlds? Mankind is learning the Elohim's recipes of creation.
This indicates that the sulfur comes from a deep mantle reservoir containing crustal material subducted before the Great Oxidation Event and preserved for over half the age of the Earth.
“These measurements place the first firm age estimates of recycled material in oceanic hotspots,” Hauri said. “They confirm the cycling of sulfur from the atmosphere and oceans into mantle and ultimately back to the surface,” Hauri said.
Caption: Sulfur isotopes within iron sulfide inclusions in volcanic rocks, like this one from Iceland, demonstrate that sulfur derived from the Earth's ancient atmosphere was preserved within the mantle for at least 2.54 billion years before coming back to the surface in eruptions at Mangaia volcano, South Pacific Ocean. Sulfide inclusion is 50 µm in diameter, light gray mineral in lower-left is olivine, darker-gray material surrounding inclusion is volcanic glass.
carnegiescience.edu...