An Unexpected Mineral In A Ryugu Grain
All articles by Wretch Fossil are here: http://www.wretch.cc/blog/lin440315&category_id=0
Quotes from https://www.eurasiareview.com/22062025-an-unexpected-mineral-an-a-ryugu-grain/
The pristine samples from asteroid Ryugu returned by the Hayabusa2 mission on December 6, 2020, have been vital to improving our understanding of primitive asteroids and the formation of the Solar System. The C-type asteroid Ryugu is composed of rocks similar to meteorites called CI chondrites, which contain relatively high amounts of carbon, and have undergone extensive aqueous alteration in their past.
A research team at Hiroshima University discovered the presence of the mineral djerfisherite, a potassium-containing iron-nickel sulfide, in a Ryugu grain. The presence of this mineral is wholly unexpected, as djerfisherite does not form under the conditions Ryugu is believed to have been exposed to over its existence. The findings were published in the journal Meteoritics & Planetary Science.
“Djerfisherite is a mineral that typically forms in very reduced environments, like those found in enstatite chondrites, and has never been reported in CI chondrites or other Ryugu grains,” says first and corresponding author Masaaki Miyahara, associate professor at the Graduate School of Advanced Science and Engineering, Hiroshima University. “Its occurrence is like finding a tropical seed in Arctic ice—indicating either an unexpected local environment or long-distance transport in the early solar system.”
I said long ago that asteroid Ryugu originated from Mars.
Wretch Fossil’s website:http://wretchfossil.blogspot.com/
Source: https://wretchfossil.blogspot.com/2025/06/an-unexpected-mineral-in-ryugu-grain.html
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