South Africa has the most kimberlite pipes. The link below has more inforamtion you might be interested in.
Kimberlite pipes form when magma rises from deep within the Earth's mantle and rapidly reaches the surface, carrying diamonds and other minerals with it. The extreme pressure and temperature inside the mantle crystalize carbon atoms into diamonds within the kimberlite magma. When the kimberlite erupts onto the surface, it brings diamonds along, creating diamond deposits.
This is impossible to answer with a finite number, because there may be undiscovered Kimberlite pipes in Botswana.
You can find a map of kimberlite pipes in the USA through geological surveys or research institutions that specialize in diamond exploration and mining. These organizations may have publicly available maps or data on kimberlite pipe locations.
In 'kimberlite pipes' which are volcanic vents deep underground in South Africa, Brazil, Canada, Australia and India. Also in river sediments the flow over these pipes, and kimberlite pipes in other parts of Africa.
No, not all volcanoes have kimberlite. Kimberlite is a type of volcanic rock that often contains diamonds, but it is only found in specific geological settings. Other types of volcanoes can be composed of different types of magma and erupt different types of rocks.
in kimberlite pipes. these happen in many parts of the world (including the U.S.) but they seem to be most concentrated in southern africa.
A craton is 'an old and stable part of the lithosphere' -- the earth's crust. One class of inclusions in the formation of the earth's crust when subductions of crust were folded into the deep, kimberlite diamond areas that lie about 150-450 K below the surface. Diamonds as we know them are exploded to the earth's surface through kimberlite pipes, which are carrot shaped and widest at the surface. Although not all kimberlite pipes are sources for diamonds, most diamonds are found in areas where kimberlite pipes occur.
There are no known kimberlite or lamproite volcanic pipes in California. There are many serpentinite bodies present, but these are generally not volcanic pipes and are not of deep seated origin.
You can find detailed kimberlite pipes maps for diamond exploration purposes from geological surveys, mining companies, and academic research institutions specializing in diamond exploration. These maps typically show the locations of known kimberlite pipes, which are the primary source of diamonds, and can help guide exploration efforts.
The vast majority of diamonds form within the Earth's lithospheric mantle at depths of around 150 to 190 km. Volcanic activity brings them to the surface in the form of volcanic pipes known as kimberlite or lamproite pipes.
They are Intrusive forming unique vertical pipes in the earth's crust.