Volcanic pipe - Wikipedia, the free encyclopedia
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Volcanic pipes are subterranean geological structures formed by the violent, supersonic eruption of deep-origin volcanoes. They are considered to be a type of diatreme . Volcanic pipes are composed...
en.wikipedia.org/wiki/Volcanic_pipe
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Lamproite pipes produce diamonds to a lesser extent than kimberlite pipes. Lamproite pipes are created in a similar manner to kimberlite pipes, except that boiling water and volatile compounds contained in the magma act corrosively on the overlying rock, resulting in a broader cone of eviscerated rock at the surface.
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www.khulsey.com/jewelry/kh_jewelry_diamond_mining.html
www.khulsey.com/jewelry/kh_jewelry_diamond_mining.html
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The complex volcanic magmas that solidify into kimberlite and lamproite are not the source of diamonds, ... they blow out the fragment-laden kimberlite to form the volcano's tuff ring and fill the pipe. Depth measurements show the level of erosion for various kimberlite pipes in South Africa. Adapted from Hawthorne (1975).
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www.amnh.org/exhibitions/diamonds/kimberlite.html
www.amnh.org/exhibitions/diamonds/kimberlite.html
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Most of the world's diamonds have been found in volcanic rock formations called kimberlite pipes, after the town of Kimberley, South Africa, where the first such pipe was discovered. Diamonds are formed at depths as great as 150 km, where heat and pressure compress carbon into the tetrahedral crystalline structures.
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www.phoenix-geophysics.com/applications/diamond_explora...
www.phoenix-geophysics.com/applications/diamond_exploration/
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'The 7 Wonders of Russia' contest nominee:Russia. Yakutia. Mirny. Kimberlite pipe. Diamond open pit.The "peace pipe". It's depth is more than 500 m...
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www.youtube.com/watch?v=je2fjG68gyU
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Diamonds typically occur in a rock called Kimberlite and in related cousins (Lamproite). ... Finally, not all kimberlite pipes have diamonds of economic value. Discovery of a kimberlite pipe does not in itself make a mine, but it certainly raises the diamond potential of an area.
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hosting.soonet.ca/eliris/geoforum/diamonds.htm
hosting.soonet.ca/eliris/geoforum/diamonds.htm
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THIS study of the isotopic composition of carbon has been carried out on six diamond crystals from kimberlite pipes in Lesotho. One crystal came from the Kao pipe, one from the Liqhobong and four from the Kolo pipe.
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www.nature.com/nature/journal/v278/n5705/abs/278630a0.h...
www.nature.com/nature/journal/v278/n5705/abs/278630a0.html
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After their formation, diamonds are carried to the surface of the earth by strong volcanic activity. This mixture of magma, transported rock and diamonds forms pipes called kimberlites as it reaches the surface. ... The size of a kimberlite is rather small. Its surface covers an area between less than 0.5 hectare and...
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atlas.nrcan.gc.ca/site/english/maps/economic/diamondexp...
atlas.nrcan.gc.ca/site/english/maps/economic/diamondexploration/locationofkimberlites/1
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Kimberlite Pipe Animation. press earth to start. Crater Zone. Indicator Mineral Train. Back. e. Lithosphere (includes the crust). Diamond stability field ...
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www.nrcan-rncan.gc.ca/smm-mms/busi-indu/dpn-npd/Kimberl...
www.nrcan-rncan.gc.ca/smm-mms/busi-indu/dpn-npd/Kimberlite-EN/Kimberlite.swf
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