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A comment on The periodic table, colour coded by the likely origin of each element. Parent comment

Re:The periodic table, colour coded by the likely origin of ... by BurningFrog on Tuesday August 11, 2020 @09:28AM (#24120057)
They didn't land on the planet, they formed it.
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Re:The periodic table, colour coded by the likely origin of ... by ncmncm on Tuesday August 11, 2020 @11:30AM (#24121379)
Some did, some didn't. All the iridium, platinum, gold we find landed.
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Re:The periodic table, colour coded by the likely origin of ... by Diederich on Tuesday August 11, 2020 @01:42PM (#24123252)
> All the iridium, platinum, gold we find landed

Cool. Do you have a quick reference for the 'landed' part? As opposed to being part of the planet from the beginning. Thanks!

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Re:The periodic table, colour coded by the likely origin of ... by dredmorbius on Tuesday August 11, 2020 @02:47PM (#24124218)
https://www.livescience.com/15938-earth-precious-metals-spac...

https://www.oakton.edu/user/4/billtong/eas100/cosmicorigins....

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Re:The periodic table, colour coded by the likely origin of ... by BurningFrog on Tuesday August 11, 2020 @01:50PM (#24123381)
I've been wondering about that.

Is it because all heavy elements present when Earth formed sank to the center?

That would make sense, but I've assumed that since we can mine gold, that's not what happened. If all the gold fell from the sky, that would explain things.

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