Pyroxenite

Pyroxenite is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite and diopside, hypersthene, bronzite or enstatite. They are classified (see diagram below) into clinopyroxenites, orthopyroxenites, and the websterites which contain both pyroxenes. Closely allied to this group are the hornblendites, consisting essentially of hornblende and other amphiboles.

They are essentially of igneous origin, though some pyroxenites are included in the metamorphic Lewisian complex of Scotland. The pyroxene-rich rocks which result from the contact metamorphism of impure limestones are described as pyroxene hornfelses (calc-silicate hornfelses).

Read more about Pyroxenite:  Intrusive and Mantle Pyroxenites, Pyroxenite Lavas, Distribution

Other articles related to "pyroxenite, pyroxenites":

Geology Of Tasmania - Geological History - Early Cambrian
... These take the form of layered pyroxenite and dunite layered dunite, and harzburgite and layered pyroxenite, peridotite and gabbro ... This magma produced the layered pyroxenite dunite in the ultramafic area ... element depletion that produced the layered pyroxenite-peridotite and associated gabbro cumulate ...
Temagami Greenstone Belt - Geology - Intrusions
... A layered intrusion composed of diorite, pyroxenite, gabbro and anorthositic gabbro has been found in northwestern Strathy Township ... Many pyroxenite dikes less than 2 m (6.6 ft) wide intrude every geologic formation in the township ... A pyroxenite dike east of Highway 11 extends roughly to the north-northwest while two others, north of Arsenic Lake, extend to the east ...
Pyroxenite - Distribution
... The pyroxenites are often subject serpentinization under low temperature retrograde metanorphism and weathering ... a good example is provided by the melanite pyroxenites associated with the borolanite variety found in the Loch Borralan igneous complex of Scotland ...
Potrillo Volcanic Field - Pyroxenites
... A pyroxenite is defined as an ultra mafic rock that is composed of by and large of minerals of the pyroxene group for example enstatite, bronzite or diopside and are sorted into ... Pyroxenites have been located as layers inside large masses of peridotite ... These pyroxenite layers have come to be inferred as a yield of the reaction between rising magmas and peridotite of the upper mantle ...