Pyroxenite is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite, diopside, hypersthene, bronzite or enstatite...
6 KB (749 words) - 19:20, 18 January 2024
matrix Pumice – Extremely vesicular volcanic rock, typically light-colored Pyroxenite – Igneous rock - a coarse grained plutonic rock composed of >90% pyroxene...
14 KB (2,187 words) - 23:33, 16 April 2024
phlogopite. The UG2 chromitites are underlain by pyroxenite footwall that is distinct from hanging wall pyroxenite. Chromite subhedral to subrounded (less than...
55 KB (6,219 words) - 09:00, 14 August 2024
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...
4 KB (343 words) - 19:17, 15 June 2024
rock in which the fraction of pyroxenes exceeds 60% are classified as pyroxenites rather than peridotites. Pyroxenes are typically dark in color. Hornblende...
32 KB (3,793 words) - 16:10, 25 August 2024
melts that produce basaltic magma probably include both peridotite and pyroxenite. The shape, structure and texture of a basalt is diagnostic of how and...
69 KB (7,809 words) - 04:19, 9 September 2024
layered intrusions, associated with cumulate layers of wehrlite, olivine pyroxenite, harzburgite, and even chromitite (a cumulate rock consisting largely...
6 KB (717 words) - 12:56, 29 July 2024
are also found in pentlandite extracted from Sudbury, Ontario, and in pyroxenite deposits in South Africa. Ruthenium, a polyvalent hard white metal, is...
50 KB (5,761 words) - 09:53, 4 September 2024
granulite facies conditions. Uralite is a particular hydrothermally altered pyroxenite; during autogenic hydrothermal circulation the primary mineralogy of pyroxene...
9 KB (1,012 words) - 14:30, 9 January 2024
minerals found in this region are dolomite, limestone, gabbro, quartzite, pyroxenite, manganese and iron ores and metabasalt. The Proterozoic non-fossiliferous...
20 KB (2,100 words) - 00:26, 28 June 2024
consist of gneiss and other metamorphic rocks, as well as ijolites, pyroxenites, and urtites. The carbonatite lavas are rapidly chemically modified by...
33 KB (3,673 words) - 17:31, 3 September 2024
range of exotic inclusions: gabbro from Ehrsberg, serpentinites and pyroxenites near Todtmoos, norite near Horbach), which are possibly the remnants...
91 KB (9,651 words) - 16:49, 7 September 2024
A sample of pyroxenite (meteorite ALH84001 from Mars), a rock consisting mostly of pyroxene minerals...
13 KB (1,476 words) - 22:03, 13 August 2024
crystallized. The ultramafic intrusives include the dunites, peridotites and pyroxenites. Other rare varieties include troctolite which has a greater percentage...
9 KB (1,059 words) - 17:30, 10 September 2024
contains harzburgite and dunite, as well as layers of spinel pyroxenite, garnet pyroxenite, and hornblendite. The layers represent partial melts extracted...
3 KB (314 words) - 19:23, 18 January 2024
Foskor's Mining Division in Phalaborwa mines phosphate rock (foskorite and pyroxenite), from which Foskor's Acid Division in Richards Bay produces phosphoric...
7 KB (500 words) - 22:19, 10 July 2024
at the contact between felsic and mafic or ultramafic rocks such as pyroxenites and dunites. It also occurs in carbonatites and metamorphosed magnesium-rich...
24 KB (2,772 words) - 17:58, 8 September 2024
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...
139 KB (4,006 words) - 08:04, 3 July 2024
77 sq mi); surrounded by diopside–scapolite–feldspar calc-granulites. The pyroxenite outcrops are dark and massive and include discontinuous calc-silicate...
19 KB (1,904 words) - 04:46, 17 June 2024
Rao, B; Parthasarathy, R; Kumar, Anil; Gopalan, K (1994). "2.0 Ga old pyroxenite-carbonatite complex of Hogenakal, Tamil Nadu, South India". Precambrian...
11 KB (1,058 words) - 20:06, 25 June 2024
equal proportions of orthopyroxene and clinopyroxene. It is a type of pyroxenite. Websterite is named after the town Webster in North Carolina. Rogers...
1 KB (60 words) - 10:47, 1 October 2023
are also found in pentlandite extracted from Sudbury, Ontario, and in pyroxenite deposits in South Africa. The industrial extraction of rhodium is complex...
27 KB (2,815 words) - 06:46, 21 August 2024
En90Fs10 in composition, is an essential mineral in typical peridotite and pyroxenite of the Earth's mantle. Xenoliths of peridotite are common in kimberlite...
9 KB (858 words) - 07:53, 26 August 2024
Flow banding at the rim of a peridotite intrusion. Dark and green pyroxenite bands at the bottom represent the melt, brownish lherzolite bands at the top...
2 KB (194 words) - 07:25, 21 October 2023
Layers of spinel-lherzolites with anhydrous Al-diopside pyroxenites and hydrous Cr-diopside pyroxenites can be found too on the island.[citation needed] Pliny...
5 KB (623 words) - 14:32, 7 February 2024
Neuburg Peak (redirect from Pyroxenite Promontory)
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...
7 KB (1,286 words) - 14:01, 21 March 2024
crystals are very brittle. It was first described in 1965 in the Afrikanda pyroxenite massif, a formation on Russia's Kola Peninsula and was named for Nikolai...
3 KB (140 words) - 08:29, 24 November 2022
Mg-Al-spinel and Ca-Tschermak-rich clinopyroxene in corundum-bearing mantle pyroxenites. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical...
8 KB (698 words) - 18:56, 26 June 2024
derived from them. It also occurs in some crystalline schist. Bronzitite, a pyroxenite of bronzite composition, is noted in the cumulate rocks of the Stillwater...
4 KB (525 words) - 02:29, 21 June 2024
ultramafics and mafic rocks (Ultramafic and mafic rocks represented by meta pyroxenite, talc-tremolite-actinolite schist, and amphibolites) of varying dimensions...
25 KB (2,586 words) - 08:04, 19 August 2024