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Alyssa

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Morgan Fucheck

on 20 March 2013

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Transcript of Alyssa

Concluding Coal has rarely played a role in the formation of diamonds. Most diamonds that are dated are much older then the first land plants. the source rockls of diamonds are vertical pipes filled with igneous rocks. four processes are thought to be responsible for diamonds that are found on earth's surface. Basic information on diamonds... Geologists believe that diamonds were formed in the mantle and delivered to the surface by deep-source volcanic eruptions. These eruptions produce the kimberlite and lamprolite pipes that are sought after by diamond prospectors. Diamonds weathered and eroded from these eruptive deposits are now contained in the sedimentary deposits of streams and coastlines. The formation of diamonds requires very high temperatures and pressure. These conditions occer in limited zones mainly about 90 miles below the earth's surface where it is about 2000 degrees Fahrenheit. The volcanic eruptions tear out pieces of the mantle and carry the diamond rapidly to the surface. The carbon source for these mantle diamonds is most likely carbon trapped in Earth's interior at the time of the planet's formation. Diamond formation in Earth's mantle. Diamond formation at subduction zones Tiny diamond have been found in rocks that are thought to have been subducted deep into the mantle by plate tectonic processes- then returned to the surface. Diamond formation in a subducting plate might occur as little as 390 degrees Fahrenheit. Diamond formation at impact sites Earth has been repeatedly hit by large asteroids in its history and when they do strike they produce extreme pressures and temperatures. These conditions are more than adequate for diamonds to from. Tiny, sub-milimeter diamonds were found at Meteor Crater in Arizona. In conclusion to all of this information, you see some of the possible ways that diamonds are formed. i hope you found this topic very interesting. i hope it encourages you to think more about these things and peruse a career in the science industry. How are Diamonds formed?
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