Dauphas thinks that Theia and … Griffin, A. A type of meteorite called an enstatite chondrite has similar isotopic composition to terrestrial rocks and thus may be representative of the material that formed Earth. 1 1 Earth’s water may have been inherited from material similar to enstatite chondrite 2 meteorites 3 4 Laurette Piani1*, Yves Marrocchi1, Thomas Rigaudier1, Lionel G. Vacher1,2, Dorian 5 Thomassin1, Bernard Marty1 6 7 8 1Centre de Recherches Pétrographiques et Géochimiques (CRPG), Centre National de 9 Recherche Scientifique (CNRS)-Université de Lorraine, Vandoeuvre-les-Nancy, F-54500, Robert J. MACKE. Enstatite chondrites contain a variety of unusual minerals that can only form in extremely reducing conditions, including oldhamite (CaS), niningerite (MgS), perryite (Fe-Ni silicide), and alkali sulfides (e.g., djerfisherite and caswellsilverite). Muséum de Toulouse. EH (high-iron) chondrites contain small chondrules (~0.2 millimetres (0.0079 in)) and high ratios of siderophile elements to silicon. Most enstatite chondrites have experienced thermal metamorphism on the parent asteroids. Saint-Sauveur meteorite, enstatite chondrite. “Hydrogen-bearing material was present in the inner Solar System at the time of the rocky planet formation, even though the temperatures were too high for water to condense.”. A study finds these meteorites contain a surprising amount of hydrogen, nitrogen, and water. Enstatite chondrites are space rocks forged from the nebula that formed the Solar System. Science 369 (6507): 1110-1113; doi: 10.1126/science.aba1948, Geologists might have found a long-lost tectonic plate  Tech Explorist, Let’s Reminisce: Appreciation for Canada’s rivers  North Texas e-News, Scientists Finally Prove that Rain Really Can Move Mountains  TechQuila, DU third cut off list 2020 Live Updates: Delhi University releases 3rd cut-off list, check it here  Hindustan Times, Turbulent Environment Set Stage for Leaps in Human Evolution 320k Years Ago  The Wire Science, Earth’s Water Came from Enstatite Chondrite-Like Asteroids, Study Suggests | Geology, Planetary Science, Space Exploration – Sci-News.com, Geologists might have found a long-lost tectonic plate – Tech Explorist, Scientists Finally Prove that Rain Really Can Move Mountains – TechQuila, DU third cut off list 2020 Live Updates: Delhi University releases 3rd cut-off list, check it here – Hindustan Times, Turbulent Environment Set Stage for Leaps in Human Evolution and Technology 320000 Years Ago – The Wire Science, Tectonic plate ‘lost’ for 60M years found hiding under Pacific Ocean – New York Post, Coastal permafrost more susceptible to climate change than previously thought – EurekAlert, Even most scientists don’t know that this famous climate theory is flawed, researchers say – Medill Reports Chicago – Medill Reports: Chicago, A tectonic plate ‘lost’ for 60M years is found hiding under the Pacific Ocean – Fox News, Little known board on ballot helps preserves wetlands, assists farmers and aids water conservation efforts – Palm Beach Post, The Canadian Mining Hall of Fame announces 2021 inductees – The Northern Miner, Archie the aetosaur makes his bronze debut on campus – Appalachian State University, Stuck At Home? A new study published in the journal Science shows that these meteorites contain sufficient hydrogen to have delivered to Earth at least three times the mass of water in […] Explore Mars With The Mars Reconnaissance Orbiter – Forbes, Geologists might have found a long-lost tectonic plate, Let’s Reminisce: Appreciation for Canada’s rivers, Scientists Finally Prove that Rain Really Can Move Mountains, DU third cut off list 2020 Live Updates: Delhi University releases 3rd cut-off list, check it here, Turbulent Environment Set Stage for Leaps in Human Evolution 320k Years Ago, How Multi-Cuvettes Spectrophotometer Market Will Survive Coronavirus Pandemic? The origin of Earth’s water remains unknown. Meteorite study suggests Earth may have been wet since it formed: Enstatite chondrite meteorites, once considered 'dry,' contain enough water to fill the oceans -- and then some. Lyul, A.Yu. [2] "The Fall of the Abee Meteorite and its Probable Orbit", Royal Astronomical Society of Canada, Journal (ISSN 0035-872X), vol. 2. These meteorites are so heavily altered by water that it is unclear whether they once contained chondrules. The 107 kilograms (236 lb) stone fell in a farmer's wheat field, creating an impact pit 0.7 m in diameter and 1.5 m deep. This page was last edited on 8 January 2021, at 18:51. Wikimedia Commons / CC BY 3.0 – The Daily Chronicle, Bam Bam Resources Provides Corporate Update and Recap on Majuba Hill Nevada – Junior Mining Network, Let’s Reminisce: Appreciation for Canada’s rivers – North Texas e-News, Turbulent Environment Set Stage for Leaps in Human Evolution 320k Years Ago – The Wire Science. They have similar oxygen, titanium and calcium isotopes as Earth, and the new study showed that their hydrogen and nitrogen isotopes are similar to Earth’s, too. ECs are presumed to be devoid of water because they formed in the inner Solar System. Image credit: Christine Fieni / Laurette Piani / French National Museum of Natural History. Enstatite chondrite meteorites, once considered ‘dry,’ contain enough water to fill the oceans — and then some. A diagnostic feature of EH chondrites is that the Fe-Ni metal contains ~3 wt% elemental silicon. Wiley Online Library. Published on January 27, 2017 by zooks777 Leave a comment. They were supposed to be the driest objects in the solar system but a recent study show they contain sufficient hydrogen to have delivered to Earth at least three times the mass of water in its oceans. Chunks of enstatite chondrite are still around in the solar system, and occasionally fall as meteorites. and Chitwood, L.A. Field Guide to Meteors and Meteorites, Springer-Verlag, London 2008. Fe-Ni metal contains ~1 wt% silicon. [1] Based on spectral analysis, it has been suggested that the asteroid 16 Psyche may be the common parent for this type of meteorite. “If enstatite chondrites were effectively the building blocks of our planet — as strongly suggested by their similar isotopic compositions — this result implies that these types of chondrites supplied enough water to Earth to explain the origin of Earth’s water, which is amazing!”. K. Higashi1,2, T. Mikouchi1,2, M. E. Zolensky3, 1Department of Earth and Planetary Science, The University of To- kyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan (e-mail: k.higashi@eps.s.u-tokyo.ac.jp), 2The University Museum, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, 3ARES, … COSMOCHEMISTRY Earth’s water may have been inherited from material similar to enstatite chondrite meteorites Laurette Piani 1*,Yves Marrocchi ,Thomas Rigaudier1, Lionel G.Vacher1,2, Dorian Thomassin 1, Bernard Marty TheoriginofEarth’swaterremainsunknown.Enstatitechondrite(EC)meteoriteshavesimilarisotopic LPSC m ON THE ORIGIN OF ENSTATITE CHONDRITE CHONDRULES BASED ON THEIR PETROGRAPHY AND COMPARISON WITH EXPERIMENTALLY PRODUCED CHONDRULES; G.E. A chondrite / ˈ k ɒ n d r aɪ t / is a stony (non-metallic) meteorite that has not been modified, by either melting or differentiation of the parent body. Enstatite chondrite (EC) meteorites have similar isotopic composition to terrestrial rocks and thus … Enstatite chondrite (EC) meteorites have similar isotopic composition to terrestrial rocks and thus may be representative of the material that formed Earth. The team also proposes that a large amount of the atmospheric nitrogen — the most abundant component of the Earth’s atmosphere — could have come from the enstatite chondrites. ECs are presumed to be devoid of water because they formed in the inner Solar System. [6] It is classified as being a shock-melted breccia, its minerals having recrystallized after the impact that knocked it off of its parent body. Earth’s water may have been inherited from material similar to enstatite chondrite meteorites. A new study published in the journal Science shows that these meteorites contain sufficient hydrogen to have delivered to Earth at least three times the mass of water in its oceans. Enstatite chondrite density, magnetic susceptibility, and porosity. Breccia, Abee (EH4)impact-melt enstatite chondrite. “Our discovery shows that the Earth’s building blocks might have significantly contributed to the Earth’s water,” said Dr. Laurette Piani, a researcher at the Université de Lorraine. The Earth continues to collect meteorites, the vast majority of which are about as old as our planet; indeed many are slightly older. “These chondrites were thus commonly considered dry, and this frequently reasserted assumption has probably prevented any exhaustive analyses to be done for hydrogen.”, Laurette Piani et al. , an enstatite chondrite meteorites, Springer-Verlag, London 2008 metallic Fe-Ni ( iron-nickel ) and Fe-bearing minerals. % water m on the origin of enstatite chondrite ( EC ) meteorites similar. Composition to terrestrial rocks and thus may be representative of the water and other MATERIALS must have come from sources. 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