The Diamond Traditional Cache
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The Diamond
The conditions for diamond formation to happen in the lithospheric mantle occur at considerable depth corresponding to the requirements of temperature and pressure. These depths are estimated between 140 and 190 kilometres though occasionally diamonds have crystallized at depths about 300 kilometres as well. The rate at which temperature changes with increasing depth into the Earth varies greatly in different parts of the Earth. In particular, under oceanic plates the temperature rises more quickly with depth, beyond the range required for diamond formation at the depth required. The correct combination of temperature and pressure is only found in the thick, ancient, and stable parts of continental plates where regions of lithosphere known as cratons exist. Long residence in the cratonic lithosphere allows diamond crystals to grow larger.
Source Wikipedia.com
Diamanten bilden sich im Erdmantel unter hohem Druck und Temperaturen, typischerweise in einer Tiefe von etwa 150 Kilometern und bei Temperaturen von 1200 bis 1400 °C. Die Muttergesteine der Diamanten sind Erdmantelgesteine wie Peridotit und Eklogit. Gasreiche vulkanische Gesteine, so genannte Kimberlite oder Lamproite transportieren Bruchstücke des Erdmantels mit den enthaltenen Diamanten bei ihrer Eruption an die Erdoberfläche, wo sie in den Pipes, den vulkanischen Eruptivschloten, gefunden werden.
Quelle: Wikipedia.com
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Additional Hints
(Decrypt)
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hfr gur Fcbvyre Cvpgherf.
Fpuyrpugre TCF Rzcsnat, ovggr Fcbvyre Ovyqre nafrura.