A sample of the orthopyroxenite meteorite ALH84001
Pyroxenite is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite, diopside, hypersthene, bronzite or enstatite. Pyroxenites are classified into clinopyroxenites, orthopyroxenites, and the websterites which contain both types of pyroxenes (see diagram below). 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 type of contact metamorphism known as pyroxene-hornfels facies, have siliceous sediment or basaltic protoliths, and are respectively metapelites and metabasites.
Pyroxenite is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite, diopside, hypersthene, bronzite or enstatite...
phlogopite. The UG2 chromitites are underlain by pyroxenite footwall that is distinct from hanging wall pyroxenite. Chromite subhedral to subrounded (less than...
equal proportions of orthopyroxene and clinopyroxene. It is a type of pyroxenite. Websterite is named after the town Webster in North Carolina. Rogers...
contains harzburgite and dunite, as well as layers of spinel pyroxenite, garnet pyroxenite, and hornblendite. The layers represent partial melts extracted...
layered intrusions, associated with cumulate layers of wehrlite, olivine pyroxenite, harzburgite, and even chromitite (a cumulate rock consisting largely...
rock in which the fraction of pyroxenes exceeds 60% are classified as pyroxenites rather than peridotites. Pyroxenes are typically dark in color. Hornblende...
in a fine matrix Pumice – Light colored highly vesicular volcanic rock Pyroxenite – Igneous rock - a coarse grained plutonic rock composed of >90% pyroxene...
granulite facies conditions. Uralite is a particular hydrothermally altered pyroxenite; during autogenic hydrothermal circulation the primary mineralogy of pyroxene...
ultramafics and mafic rocks (Ultramafic and mafic rocks represented by meta pyroxenite, talc-tremolite-actinolite schist, and amphibolites) of varying dimensions...
Foskor's Mining Division in Phalaborwa mines phosphate rock (foskorite and pyroxenite), from which Foskor's Acid Division in Richards Bay produces phosphoric...
Rao, B; Parthasarathy, R; Kumar, Anil; Gopalan, K (1994). "2.0 Ga old pyroxenite-carbonatite complex of Hogenakal, Tamil Nadu, South India". Precambrian...
minerals found in this region are dolomite, limestone, gabbro, quartzite, pyroxenite, manganese and iron ores and metabasalt. The Proterozoic non-fossiliferous...
the USGS geological party in the Pensacola Mountains, 1978-79, from the pyroxenite rock which forms a conspicuous dark layer along the cliffs of the promontory...
Kosvinsky Rock as "mountain massif" of height 1,519 m. Its constitution is pyroxenites and dunites of lower and middle Paleozoic era. The slopes are covered...
77 sq mi); surrounded by diopside–scapolite–feldspar calc-granulites. The pyroxenite outcrops are dark and massive and include discontinuous calc-silicate...
ilmenite exsolution texture in clinopyroxene from the Hujialing Garnet-Pyroxenite, Su-lu U.H.P. Terrane, Central China: A geodynamic Implication" (PDF)...
at the contact between felsic and mafic or ultramafic rocks such as pyroxenites and dunites. It also occurs in carbonatites and metamorphosed magnesium-rich...
are also found in pentlandite extracted from Sudbury, Ontario, and in pyroxenite deposits in South Africa. The industrial extraction of rhodium is complex...
The eclogite melt may then react with enclosing peridotite to produce pyroxenite, which in turn melts to produce basalt. Occurrences exist in western North...
are also found in pentlandite extracted from Sudbury, Ontario, and in pyroxenite deposits in South Africa. Ruthenium, a polyvalent hard white metal, is...
melts that produce basaltic magma probably include both peridotite and pyroxenite. The shape, structure and texture of a basalt is diagnostic of how and...
the 48th Edition of the Handbook of Chemistry and Physics on page E-4. Pyroxenite 4.3 ± 0.1 List: Birch and Clark in Robertson, page 31. 300 This summary...
and elsewhere in the western Deccan and contain spinel lherzolite and pyroxenite constituents. While the Deccan traps have been categorized in many different...
En90Fs10 in composition, is an essential mineral in typical peridotite and pyroxenite of the Earth's mantle. Xenoliths of peridotite are common in kimberlite...
crystallized. The ultramafic intrusives include the dunites, peridotites and pyroxenites. Other rare varieties include troctolite which has a greater percentage...
range of exotic inclusions: gabbro from Ehrsberg, serpentinites and pyroxenites near Todtmoos, norite near Horbach), which are possibly the remnants...
Peninsula and from Meagher County, Montana, US. It occurs in pegmatites in a pyroxenite intrusion as crystals in miarolitic cavities. It occurs associated with...
Global Information