Method of carbon 14 dating
Method of carbon 14 dating - norge dating norge
Long residence in the cratonic lithosphere allows diamond crystals to grow larger.
Diamond-bearing volcanic pipes are closely related to the oldest, coolest regions of continental crust (cratons).Diamonds are thought to have been first recognized and mined in India, where significant alluvial deposits of the stone could be found many centuries ago along the rivers Penner, Krishna and Godavari.Diamonds have been known in India for at least 3,000 years but most likely 6,000 years.Special gemological techniques have been developed to distinguish natural diamonds, synthetic diamonds, and diamond simulants.The word is from the ancient Greek ἀδάμας – adámas "unbreakable".These depths are estimated between 140 and 190 kilometers (87 and 118 mi) though occasionally diamonds have crystallized at depths about 300 km (190 mi).
The rate at which temperature changes with increasing depth into the Earth varies greatly in different parts of the Earth.
These conditions are met in two places on Earth; in the lithospheric mantle below relatively stable continental plates, and at the site of a meteorite strike.
The conditions for diamond formation to happen in the lithospheric mantle occur at considerable depth corresponding to the requirements of temperature and pressure.
Small amounts of defects or impurities (about one per million of lattice atoms) color diamond blue (boron), yellow (nitrogen), brown (lattice defects), green (radiation exposure), purple, pink, orange or red.
Diamond also has relatively high optical dispersion (ability to disperse light of different colors).
) is a metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice.