How did gold and silver come into existence?

After searching on the Internet I'm confused. Some sources say gold is the last thing certain type of stars produce when they die and explode and others say its formed within the Earth. Anyone here know where gold and silver originate from?

 

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... Within a split second of posting this had 6 views instantly, WTF? How can this be possible?

Edited to emphasise the instantly

 

Spiders

 

Dr Willbold continued: "Our work shows that most of the precious metals on which our economies and many key industrial processes are based have been added to our planet by lucky coincidence when the Earth was hit by about 20 billion billion tonnes of asteroidal material."

http://www.sciencedaily.com/releases/2011/09/110907132044.htm

 

I remember once being told that cheese came from the moon.

Maybe gold comes from Uranus.

Buggered if I know where silver comes from!

 

its an old story to let go and the love of that metals, eyes bigger than the sun was looking at that

moment after, nothing were visible again.

 

Seems both are true:

http://ww2.valdosta.edu/~cbarnbau/astro_demos/stellar_evol/evol_3.html

http://www.slideshare.net/lewisglar...smutation-networks-can-produce-golddec-7-2012

http://forums.silverstackers.com/topic-3731-a-brief-history-of-gold.html

 

:lol: quote from ur anus

I cant stop :lol:


See wat u done; I pee meself. From laughing too much.


I wouldnt have a clue too but urine is gold in colour maybe there where it comes from.

 

Interesting question & one ive never really pondered nor qualified to answer

Just took it for granted its always been here in the earths crust,although i read somewhere (probably a kingworld news article) that in theory
as you get closer to the earths core there should be vastly higher concentrations of gold as its density is greater to the surrounding mass & has sunken over the many years ??

Haha dunno bout that ^ one ^,but im keen on the asteroid deposit idea -sounds heaps more fun,so im sticking with it.

Gunna do some homework on it ..
Dam rain has ruined my day outside anyway ...

 

All elements (besides hydrogen) are formed within stars and/or during supernovas
Earth does not produce elements, as it does not have enough pressure and heat to fuse the protons/neutrons together.
The elements we find on earth were simply deposited during its formation from stardust/space rocks.

Read up on http://en.wikipedia.org/wiki/Stellar_nucleosynthesis
and http://en.wikipedia.org/wiki/Supernova_nucleosynthesis

 

Invented by Odin so warriors could buy Mead and roast Boar

 

Found this in the National Geography mag while sipping me coffee. Not that it answers the question, but still..

 

I didn't know sapphires could be so young! Wow.

 

btw that numbers are in million years, in case you missed it

 

Actually your right 10 million years isn't that young

 

The big bang or gift from God?

 

Scientists: all the gold reserves in the world have extraterrestrial origins

According to a survey conducted by American scientists, all earthly gold, which has and will have in the future of mankind, has an extraterrestrial origin. Gold reserves are due to the advent of space on the planet crash - a collision of our planet from another space body about the size of Pluto.

A study report published in the journal Science, was conducted by William Bottke of the Institute of lunar exploration, NASA and its counterparts.

According to the ideas of science about the formation of Earth and other planets with an iron core and a silicon mantle, the heavy elements close to the geochemical properties of the iron (siderophile) - platinum, palladium, cobalt, nickel, molybdenum, gold, iridium, osmium and some others - need to migrate to the center of the planet, according to RIA Novosti.

Thus, the Earth should not have a gold ores and other siderophile elements in the cortex, where people could get them. However, the fact that the extraction of metals on Earth, thriving for thousands of years, suggests that even after the formation of mantle and core are some processes have led to the enrichment of the crust of the planet with heavy elements.

Perhaps that the metals came to earth as a result of "heavy meteorite bombardment" in the later stages of the formation of the solar system. However, until now scientists were uncertain whether it was a single blow of a space object, or the duration of the "rain".

Bottke and his colleagues used computer simulations to calculate the parameters of the space object, to provide humanity with gold and other metals. Researchers have developed a number of criteria by which this object should be large enough to pierce the crust of the planet (but not enough to destroy its core), and also contain a sufficient amount of siderophile elements.

The calculations are best suited to these conditions of outer body diameter from 2,5 to 3 thousand kilometers, which is about the size of Pluto.

more at http://americanews.ru/en/h02/15322.html

 

Meteorites delivered gold to Earth

Scientists have shown that the Earth's surface became enriched with precious metals by impacting meteorites.

The Earth's crust and mantle has considerably more gold than expected from favoured models of planetary formation.

A study from the University of Bristol looked at some of the oldest rocks on Earth, demonstrating that gold was delivered by meteorites long after their formation.

Their results are published in Nature.

While the Earth was forming, iron sank to the centre of the planet, forming the core.

Any precious metals in the planetary mix would have gone with this iron and concentrated in the core, leaving the mantle devoid of elements such as gold, platinum, and osmium.

But this is not what we observe. In fact, the silicate mantle has up to 1,000 times more gold than anticipated.

Several reasons for this enrichment were proposed in the past, including delivery by meteorites, although until now it has not been possible to prove.

By measuring isotopes in rocks that are nearly four billion years old from Greenland, the team has managed to date the gold delivery, and to relate it to an event known as the "terminal bombardment".

Impact theory
Earth formed by a snowball-effect known as accretion 4.55 billion years ago. The iron core with its accompanying mixture of precious metals formed very soon after that, within just a few million years.

A final impact of a Mars sized body with the Earth formed the Moon and finalised our planet's formation. By this time all gold would be locked up in the core.

A final burst of meteorite impacts around 3.9 billion years ago is known as the "terminal bombardment" and caused the cratering that we still see on the Moon.

It was during this last impact event that the gold which we can access in the crust was delivered.

"The proportions of gold and other precious metals are difficult to measure because they concentrate into nuggets, and we need to analyse a lot of rocks to get meaningful data." said lead researcher Dr Matthias Willbold.

They have therefore developed a way of telling this remarkable story of gold's extraterrestrial origin using a completely different element - tungsten.

Tungsten acts very similarly to precious metals like gold, but importantly it comes in different forms, or isotopes.The team have looked at the proportions of the different isotopes in modern rocks and in the most ancient rocks in Greenland.

They found a small but significant difference in the proportions, indicating that the modern rocks had received a dose of tungsten, and therefore also gold, from meteorites.

The Greenland rocks showed no such enrichment, giving a date to the input of gold. This date corresponds to the time of the terminal bombardment around 3.9 billion years ago.

During this time, the Earth would have been hit with 20 billion billion tonnes of asteroid material, although "it is not clear whether this would have come in the form of many small impacts, or just two or three mega-impacts", Dr Willbold said.

The research group at the University of Bristol are the first to successfully make such high-quality measurements of tungsten in ancient rocks, but so far have only analysed samples from Greenland.

"We hope to find more," said Dr Willbold, "and look at a time sequence for one billion years after the Greenland rocks, to see how the tungsten anomaly develops."

http://www.bbc.co.uk/news/science-environment-14827624

 

Interestingly, translations of ancient clay tablets left by the Sumerian civilisation according to Zecharia Sitchin in his book "The Twelfth Planet" published in 1976 refer to a planetary collision with the primordial Earth, then known as Tiamat and another celestial body, Nibiru, knocking it into its present orbit, leaving the debris field known as the asteroid belt. It seems science is validating that idea....

 

Ummm, 3.9 billion years is quite a bit before any multicellular life evolved let alone primates etc. Although superficially similar, Sitchin's timelines of events have massive problems to say the least.