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Chris Rowan · @allochthonous

1354 followers · 379 posts · Server scicomm.xyz

Ars Technica - Life on Earth might have gotten a boost from the Sun’s mega-tantrums

The young sun was dinner than today, but also prone to throwing off super-energetic flares - which, experiments with a particle accelerator (!) show, were “more effective at creating amino acids and one of their components, carboxylic acids, than either lightning [in the Hadrian Earth’s atmosphere] or galactic cosmic rays.

Definitely wins the coolest use of particle accelerator prize for the week.

https://arstechnica.com/science/2023/05/life-on-earth-might-have-gotten-a-boost-from-the-suns-mega-tantrums/

#geology #hadean #abiogenesis

#abiogenesis #Hadean #geology

Last updated 1 year ago

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Bill Minarik · @silicatefondue

97 followers · 156 posts · Server fosstodon.org

@Anthro @Ceedave The 4.3 Ga age is from coupled Nd-Sm systems (short and long lived); the mafic rocks do not have zircons. The younger age is from zircons in cross-cutting felsic units. This is the work of Jonathan O'Neil (now at #uottawa) https://mcgillnews.mcgill.ca/s/1762/news/interior.aspx?sid=1762&gid=2&pgid=1190

https://en.wikipedia.org/wiki/Nuvvuagittuq_Greenstone_Belt

Some of the rind remains and is compositionally distinct. Recent work has used triple oxygen to constrain seawater chemistry (https://www.sciencedirect.com/science/article/abs/pii/S0012821X22001753)
#Hadean #McGilUniversity #PillowBasalt

#uottawa #Hadean #mcgiluniversity #pillowbasalt

Last updated 2 years ago

Original post

Bill Minarik · @silicatefondue

87 followers · 143 posts · Server fosstodon.org

Open media

The pillow rinds have preferentially weathered, outlining the basalt pillows formed at least 3.75 and perhaps as long ago as 4.3 billion years ago. Now metamorphosed to amphibolite grade. In the Ujaraaluk unit of the Nuvvuagittuq Greenstone Belt, near #Inukjuak, northern #Quebec. #McGill University #EarthSystemScience #PillowBasalt #Hadean 1/2

#inukjuak #quebec #mcgill #earthsystemscience #pillowbasalt #Hadean

Last updated 2 years ago

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Tim Lichtenberg · @timlichtenberg

506 followers · 90 posts · Server fediscience.org

Open media

There are a number of ideas on the #OriginOfLife 🧬🌱🐈 , but a thread of recent #experimental results indicate high yields of interesting #biomolecules in #surface settings on the early #Hadean #Earth. See attached figure from Sasselov+ (2020, SciAdv)

#earth #Hadean #surface #biomolecules #experimental #originoflife

Last updated 2 years ago

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