Study suggests Earth and Moon not identical oxygen twins

phys.org ^ | 03/10/2020 | Steve Carr

[BenLurkin]

The paper, titled Distinct oxygen isotope compositions of the Earth and Moon, may challenge the current understanding of the formation of the Moon.

Previous research led to scientists to develop the Giant Impact Hypothesis suggesting the Moon was formed from debris following a giant collision between early-Earth and a proto-planet named Theia. The Earth and Moon are geochemically similar. Samples returned from the Moon from the Apollo missions showed a near-identical composition in oxygen isotopes.

Although the Giant Impact Hypothesis can nicely explain many of the geochemical similarities between Earth and Moon, the extreme similarity in oxygen isotopes has been difficult to rationalize with this scenario: either the two bodies were compositionally identical in oxygen isotopes to start with, which is unlikely, or their oxygen isotopes were fully mixed in the aftermath of the impact, which has been difficult to model in simulations.

"Our findings suggest that the deep lunar mantle may have experienced the least mixing and is most representative of the impactor Theia," said Erick Cano. "The data imply the distinct oxygen isotope compositions of Theia and Earth were not completely homogenized by the Moon-forming impact and provides quantitative evidence that Theia could have formed farther from the Sun than did Earth."

To arrive at their findings, Cano, a research scientist, and along with colleagues Zach Sharp and Charles Shearer from UNM's Department of Earth and Planetary Sciences, conducted high-precision measurements of the oxygen isotopic composition on a range of lunar samples at UNM's Center for Stable Isotopes (CSI). The samples included basalts, highland anorthosites, norites and volcanic glass, a product of uncrystallized rapidly cooled magma.

[EnglishOnly]

“Suggest”?

Study?

[oldplayer]

Apparently any idea I have regarding the subject is about as valid as any of theirs.

[angmo]

https://www.gaia.com/article/the-hollow-moon-theory-is-the-moon-an-artificial-satellite

[ifinnegan]

Why are you promoting nutcase stuff?

[GodAndCountryFirst]

Read Genesis. It’s all in there. It happened about 6,000 years ago. God was there and documented the whole thing.

[BenLurkin]

Yes. Let’s hear about the studies you have done, gentlemen.

[BenLurkin]

6 thousand or 6 billion, either way the makeup of the moon is the same.

[Telepathic Intruder]

Their crusts are similar, their interiors are most likely not. I have learned nothing new.

[SunkenCiv]

More of the “heads I win, tails you lose” — the oxygen isotope ratios are fairly close, so, look, the Moon was born of giant impact! Oh, wait, they differ by too much, which means, hey, the Moon was born of giant impact! :^)

[SunkenCiv]

Sorry, I don’t mean to appear to be dogpiling on. I know very well how hard it sometimes seems to be to post ANYTHING of science or history around here. I’ll have more after I have some time at home. Meanwhile, check the “lunarorigin” keyword.

[minnesota_bound]

Earth captured Moon Base Alpha. We hopped off and been living on Earth ever since. We be aliens....

[oldplayer]

I didn’t bother with any studies, Ben. I just went straight to my inconclusive speculative conclusion, which is: “not really sure.”

Really, just joking a bit. The work these guys do and the pure facts they obtain is pretty amazing. It just made me laugh a bit that at the end of the day, they sound like lawyers: “on the one hand . . . but, on the other hand.”

[SunkenCiv]

The rest of the "lunarorigin" keyword, chrono:

• Space stunner: Moon is shrinking, shocking study reveals [2019]
• The moon may be made from a magma ocean that once covered Earth [2019]
• How Old Is Earth? [2019]
• Moon discovery: Ancient 4-billion-year-old relic found on lunar surface [possible Earth rock] [2019]
• Quake split a tectonic plate in two, and geologists are shaken [2018]
• A Collision in Space 466 Million Years Ago Is Still Hurling Asteroids at Earth [2018]
• Earth's days used to be just 18 hours long, but the Moon changed that [2018]
• Days on Earth Are Getting Longer, Thanks to the Moon [2018]
• Jupiter and Venus Change Earth's Orbit Every 405,000 Years [2018]
• What if the Moon was split in half? [2018]
• The Moon WASN'T formed with one giant impact but had a bombardment birth after 20 moonlets hit... [2018]
• The moon formed inside a hot cosmic doughnut, scientists say [2018]
• The Moon's equatorial bulge hints at Earth's early conditions [2018]
• Earth and Venus are the Same Size, so Why Doesn't Venus Have a Magnetosphere?.... [2017]
• Asteroids 'dumped water into molten Moon' [2016]
• NASA Research Provides New Details On Mystery of How the Moon Got 'Inked' [2016]
• Ancient lunar polar ice reveals tilting of Moon's axis [2016]
• Large Meteorite Impacts and Planetary Evolution V [2016]
• Ancient Earth Remnant Is Inside Earth, Study Says [2014]
• A collision 4.5 billion years ago nearly destroyed our planet but instead helped start path to life [2014]
• Moon created in violent collision with Earth, clues in Apollo rocks suggest. [2014]
• Scientists May Be Wrong About The Amount of Water In The Moon [2014]
• Crystal is 'oldest scrap of Earth crust' [2014]
• Water Hidden in the Moon May Have Proto-Earth Origin [2013]
• How the American West was made -- a new view of plate tectonics [2013]
• Solar System Ice: Source of Earth's Water [2012]
• Free-floating planets in the Milky Way outnumber stars by factors of thousands [2012]
• Titanium Paternity Test Fingers Earth as Moon's Sole Parent [2012]
• Astronomy Picture of the Day -- Evolution of the Moon [ video ] [2012]
• Who Needs a Moon? [2011]
• Moon's interior water casts doubt on formation theory [2011]
• Moon has liquid core just like Earth...reveal sensors left on surface by astronauts 40 YEARS ago [2011]
• Astronauts, Artists Agree: Moon Stinks of Gunpowder [2010]
• Where on Earth has our water come from? [2010]
• Water on the Moon: a Billion Gallons [2010]
• Moon Not Only Has Water, but Lots of It [2010]
• Gondwana Supercontinent Underwent Massive Shift During Cambrian Explosion [2010]
• The Earth and moon formed later than previously thought [2010]
• The Moon may have formed in a nuclear explosion [2010]
• Why is the Earth moving away from the sun? [2009]
• STEREO Hunts for Remains of an Ancient Planet near Earth... [2009]
• The Search for the Solar System's Lost Planet [2009]
• STEREO Hunts for Remains of an Ancient Planet near Earth [2009]
• Quakes triggered by tides of solid Earth [2009]
• The Curious Case of Missing Asteroids [2009]
• Far side of the moon 'could have been visible from earth' [2009]
• Were Mercury and Mars separated at birth? [2009]
• Source of Moon's Magnetism Found [2009]
• Did Earth's Twin Cores Spark Plate Tectonics? [2009]
• Moon Has Iron Core, Lunar-Rock Study Says [2008]
• Moon Is Younger And More Earth-Like Than Thought [2007]
• Earth's Moon is 'cosmic rarity' [2007]
• Earth's Moon is Rare Oddball [2007]
• Ancient impact may have bowled the Moon over [2007]
• Far-Flung Space Crash May Help Solve Mystery of Moon's Formation [2007]
• Amazon River Once Flowed in Opposite Direction [2006]
• Landscapes from the ancient and eroded lunar far side [2006]
• Planets Around Planets? [2006]
• Neptune Might Have Captured Triton [2006]
• An explosion on the Moon [2005]
• Comet or Meteorite Impact Events in 1178AD? [2005]
• New evidence for the Moon's soft middle [2004]
• It Came from Outer Space? [2004]
• When the Days Were Shorter [2004]
• A Celestial Collision [2004]
• In the shadow of the Moon [2004]
• No Moon, no life on Earth, suggests theory [2004]
• Heavenly Bodies Stir Up Routine Catastrophes [2003]
• Long-Destroyed Fifth Planet May Have Caused Lunar Cataclysm, Researchers Say [2002]
• Earth-Shattering Theory:FINALLY, THE DETAILS FOR FORMING THE MOON WORK OUT [2001]

[SunkenCiv]

Thanks BenLurkin.

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[Redcitizen]

“ Study shows earth and moon not identical oxygen twins.”
Fraternal twins then? Brother from another mother?

[SunkenCiv]

FRIENDS 05 24) Identical Twin Hands