An uneven grained, ultramafic, intrusive rock in which the visible minerals may include olivine, phlogopite, pyrope garnet, picroilmenite and chrome-diopside cemented by a groundmass, which may include serpentine, calcite and chromate. Kimberlite may be diamondiferous and, along with olivine lamproites, are the only know primary source of diamonds.
is an magmatic rock that occurs in ancient volcanic pipes. The rock is most famous as host of diamonds, although not all Kimberlites contain diamonds. Diamondiferous imberlite occurs on ancient, Precambrean terranes, like the Baltic Shield and in Yakutia.
A variety of peridotite that is found in volcanic pipes which are thought to be intrusions from the upper mantle. Many diamond deposits are found in kimberlite pipes.
peridotite containing garnet and olivine and found in volcanic pipe, through which it may come from the upper Mantle.
an uneven grained, ultramafic, intrusive rock in which the visible minerals may include olivine, phlogopite, pyrope garnet, picroilmenite and chrome diopside cemented by a groundmass which may include serpentine, calcite and chromite. kimberlites may be diamondiferous and, along with olivine lamproites, are one of the primary economic sources of diamonds (see "pipe" below)
a type of igneous rock, the most common host rock for diamonds. It is formed at great depths and is forced to the surface as volcanic pipes, dykes and sills.
a rare type of peridotite that sometimes contains diamonds; found in South Africa and Siberia
a type of rock (produced by volcanic activity) that can contain diamonds
A type of magma which originates very deep within the earth, and passes through the regions that contain diamonds that have crystallized in mantle host rocks.
An ultra basic rock defined as a porphyritic alkalic peridotite containing phenocrysts of olivine and phlogopite. Occurs as dykes or as characteristically carrot-shaped pipes.
an igneous rock of mantle origin occurring in intrusive breccia pipes, which is sometimes diamond bearing.
Volcanic diamond-bearing rock (also called blueground).
a type of igneous rock, some of which contain diamonds.
A rare volcanic rock-type that usually fills narrow, deep vents in areas of very old crust. Some kimberlites contain small amounts of diamond.
A variety of peridotite; the most common host rock of diamonds.
A volcanic rock that may contain diamonds.
a mantle-derived peridotic rock found in South Africa, Zaire, Siberia, and some other areas, usually partly altered to serpintine. [AHDOS
uneven-grain, ultramafic rock in which the visible minerals may include olivine, phlogopite, pyrope garnet, picro-ilmenite and chrome/diopside, which are cemented by a groundmass that may include serpentine, calcite, and chromite. Kimberlite and olivine lamproite (a similar type of rock) are the only known types of intrusive rock (primary source rocks) that may carry diamonds from the depths of the earth to the surface and may form primary diamond deposits.
Kimberlite is a type of rock best known for sometimes containing diamonds.