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A brief but comprehensive description of how gold ore bodies form and the differences between placer and hard rock gold deposits.
- 11 min
- 1M
- Hard Rock University
Jul 21, 2023 · Gold is still quite the sought-after metal today with the industry generating almost 200 billion USD in revenue every year. But how is gold made? Welcome to Factora!
- 8 min
- 921.5K
- Factora
Oct 8, 2015 · CERN Scientist David Lunney outlines the incredible journey of gold from space to Earth. Lesson by David Lunney, animation by Andrew Foerster. View full lesson: http://ed.ted.com/lessons/where ...
- 5 min
- 8.1M
- TED-Ed
- Natural Gold Formation
- Where Does Gold occur?
- How Much Gold Is in The World?
- Synthesizing The Element Gold
While nuclear fusion within the Sun makes many elements, the Sun cannot synthesize gold. The considerable energy required to make gold only occurs when stars explode in a supernova or when neutron stars collide. Under these extreme conditions, heavy elements form via the rapid neutron-capture process, also known as the r-process.
All of the gold found on Earth came from the debris of dead stars. As the Earth formed, heavy elements such as iron and gold sank toward the planet's core. If no other event had occurred, there would be no gold in the Earth's crust. But, around 4 billion years ago, Earth was bombarded by asteroid impacts. These impacts stirred the deeper layers of ...
The amount of gold extracted from the Earth is a tiny fraction of its total mass. In 2016, the United States Geological Survey (USGS) estimated about 7.8 million troy ounces or 244,000 U.S. tons had been discovered since the dawn of civilization. Because gold is so dense (19.32 grams per cubic centimeter), it does not take up much space for its mas...
Attempts by alchemists to turn lead (or other elements) into gold were unsuccessful because no chemical reaction can change one element into another. Chemicalreactions involve a transfer of electrons between elements, which may produce different ions of an element, but the number of protons in the nucleus of an atom is what defines its element. All...
Feb 23, 2024 · How is it formed, where is it found, and could it be mined in outer space? We will delve into gold’s origins, tracing its path from the depths of space to the Earth’s crust and ask the question whether gold could one day be synthesized.
Dec 3, 2013 · The answer involves exploding stars, asteroids, bacteria, earthquakes, and lots of geology. All the gold ever mined would fit into a cube less than 21 metres on each side. Gold is a 'precious metal', with a price up around $60,000 per kilogram.
Did you know that gold is extraterrestrial? Instead of arising from our planet’s rocky crust, it was actually cooked up in space and is present on Earth because of cataclysmic stellar explosions called supernovae. CERN Scientist David Lunney outlines the incredible journey of gold from space to Earth. Where does gold come from?
