Skip to comments.Huge Asteroids Brought Gold to Infant Earth, Study Says
Posted on 12/24/2010 11:45:17 AM PST by SunkenCiv
..Scientists have long known that there's a mysterious amount of siderophile ("iron-loving") metals in Earth's mantle. Such metals, including gold, tend to affiliate with iron in their liquid forms.
The best explanation has been that some sort of space object brought the elements to the planet just after it formed its core, but the exact nature of the impactor has been a matter of debate.
Based on computer simulations, the new study says that a small number of enormous, random impacts roughly 4.5 billion years ago are the sources of Earth's iron-loving materials.
These impactors were rocky objects left over from our solar system's planet-formation phase. The largest one that hit Earth was roughly the size of Pluto -- up to 2,000 miles (3,220 kilometers) wide, the study suggests.
And young Earth wasn't the only recipient: Cataclysmic collisions delivered iron-loving metals to the moon and Mars around the same time, the study authors say. What's more, the impacts may have been the source of water on the moon...
Moon rocks brought back during the Apollo missions led to the now widely accepted theory that the moon formed when a Mars-size object crashed into early Earth.
Energy from the impact would have spurred the still forming Earth to develop its mostly iron core. When this happened, iron-loving metals should have followed molten iron down from the planet's mantle and into the core.
But we know that gold and other iron-lovers are found in modest abundances in Earth's mantle.
Using a mathematical approach called Monte Carlo analysis, Bottke's team calculates that iron-loving metals were delivered in a limited number of massive impacts that just happened to miss the moon...
(Excerpt) Read more at news.nationalgeographic.com ...
subtitle: Pluto-size space rocks may have put precious metals in the mantle.
|· join · view topics · view or post blog · bookmark · post new topic · subscribe ·|
Thank goodness. I was getting worried what Soros would do when he bought up all the precious metals on Earth. Now he can make speculations on astroids.
and two other giant asteroids brought frankincense and myrrh.
Wonder if we can get one to come and take the Democrats away from Earth?
so.... if the moon formed from ejecta of a collision then does that mean what hit the baby Earth was bigger than the moon or maybe the same size?
the article actually started with something like that, I kinda edited it out. :’)
I nominate you for post of the day. :p
So giant asteroids may bring us enough gold to pay off our government debt?
Hey billorites: Amen to that!
“The best explanation has been that some sort of space object brought the elements to the planet just after it formed its core........” Yes. His Name is Yahweh, or Jehovah, or God, or The Lord Jesus Christ.
Isa 45:3 And I will give thee the treasures of darkness, and hidden riches of secret places, that thou mayest know that I, the LORD, which call thee by thy name, am the God of Israel.
Joh 1:1 In the beginning was the Word, and the Word was with God, and the Word was God.
Joh 1:2 The same was in the beginning with God.
Joh 1:3 All things were made by him; and without him was not any thing made that was made.
We picked up the moon from the planet that formed the asteroid belt when it was destroyed.
Bigger than the moon. Mars-sized. Mars is roughly twice the size of the moon. It stands to reason, seeing as that a good bit of the "stuff" from the impactor would have been left behind on Earth, while the ejecta turned into the moon.
The impact theory is more widely accepted now. It is actually being presented as fact in a lot of astronomy shows I watch.
Dammit Jim, I’m a cabinetmaker, not a physicist...
Just in case anyone is planning a trip...http://www.permanent.com/a-index.htm
Silly scientist. Everyone knows the moon, Mars and the Earth were bombarded with gold & iron when the planet between mars and Jupiter was hit by planet X
Sound like a book I ready by Jules Verne.
Talk about wrecking the world economy. Imagine a rock out there big enough to make gold as common as aluminum.
Yes. Maybe we’ll be lucky and get hit by a huge asteroid.
beat me to it :)
One big asteroid was the one that hit Fort Knox. All that gold had a chapel built it over by the natives who now have their warriors guarding it. Be warned! To approach it may mean death to the uninitiated.
As an aside, from what I have watched/read, the Earth and the object basically destroyed each other, and were nothing but big piles (a single big pile?) of rubble for a LONG time. The early Solar system was a very dangerous place.
Good one! Neither am I. Just a wannabe astronomer/astrophysicist. Never could handle the math, though. Ended up doing computer stuff. Still sciency, but without all the math. My childhood hero was Carl Sagan. But then Reagan came along and knocked him out of first place. :)
Based on computer simulations...IOW, a Wild-A$$ed Guess.
Immanuel Velikovsky was always a fave of mine. My mom handed me one of his books when I was in Jr. High. It was on.
Just because the impact theory is the most widely accepted one currently doesn’t mean I HAVE to believe it.
If they were to bribe me with some of that there high falutin’ grant fundage I might mouth the words they whisper in my ear.
What they need to do is invent a time traveling video camera and send it back. Seeing is believing.
LOVE YA BRO.
HAVE A BLESSED DAY.
Wouldn't the mass of the moon be less comparatively as it lacks the heavier core?
Made of lighter materials.
Lighter than air.
That must be right!
I've SEEN it floating thru the night sky!
Right you are about the volume. Density also matters, the Moon has about 1/100th the mass of the Earth, Mars though is about 1/8th the mass of Earth as well as about 1/8th the volume.
I like that gif, may have to steal that.
Okay, now I’ve got to get crackin’ and do the GGG digest and ping, which was my plan when I got online after a late nap on the 24th. :’)
Yes, the mass is definitely less. But I think you are confusing mass with density. Mass equals density times volume. And yeah, the Earth is a heck of a lot more dense than the moon. All the lighter, dusty stuff coalesced into the moon, while we kept all the nice, dense, metallic stuff for ourselves down here (like our heavy iron core that you mentioned - without which we would be totally $crewed).
And you have a good point about the moon floating. I never thought of that. It's like a gigantic dust balloon. Yeah! That's it!
Oh, and Merry Christmas, everybody! I just noticed it is passed midnight in my timezone.
Yeah, he gets more impressive as time goes on and more of his "crackpot" theories get proven right. Brilliant!
I had an engineer buddy of mine work on that time machine idea, but he couldn't power it. He muttered something about needing about 10 suns to power it and threw it in his recycle bin. Oh, well... :)
"Emerging from a particularly credulous Southern California culture, Nancy and Ronald Reagan relied on an astrologer in private and public matters -- unknown to the voting public. Some portion of the decision-making that influences the future of our civilization is plainly in the hands of charlatans." -- Carl SaganSagan also blasted that Reagan made Carter look like Cardinal Richelieu, opposed SDI, and nearly singlehandedly gave birth to the global warming movement.
Element 79, by Fred Hoyle 1967...
Merry Christmas, TC! Hope Santa is good to you this year!
Give me a break, I was a little kid. Reagan (first) got elected when I was 10! I remember getting mad at my mom for voting for Anderson. I know Carl was a whacky lib, but most academics are.
Oh, by the way, Reagan and Thatcher actually did kinda give birth to the global warming thing. They were trying to get the libs to get on board with nuke power. Maggie was VERY vocal about it.
Merry Christmas bro!
Mmmm.....ammo! And Scotch! The Ol Elf was good this year!
Yeah! He left the same stuff for me!
Sure am glad St. Nick ain't a liberal teetotaler.
My wife gave me .308 Gold Medal.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.