Eclogite ( /ˈɛklədʒaɪt/) is a metamorphic rock containing garnet (almandine-pyrope) hosted in a matrix of sodium-rich pyroxene (omphacite). Accessory minerals...
17 KB (1,745 words) - 21:45, 13 August 2024
metamorphosed to the blueschist facies and then the eclogite facies. Metamorphism to the eclogite facies releases a great deal of water vapor from the...
37 KB (4,414 words) - 09:37, 11 March 2024
Subduction zone metamorphism (section Eclogite facies)
metamorphic path through the zeolite, prehnite-pumpellyite, blueschist, and eclogite facies stability zones of subducted oceanic crust. Zeolite and prehnite-pumpellyite...
19 KB (2,315 words) - 22:30, 2 March 2024
Metamorphic facies (section Eclogite facies)
aragonite The eclogite facies is the facies at the highest pressure and high temperature. It is named for the metabasic rock eclogite. The eclogite facies has...
13 KB (1,402 words) - 19:59, 8 February 2024
green or nearly colorless variety of clinopyroxene. It normally appears in eclogite, which is the high-pressure metamorphic rock of basalt. Omphacite is the...
13 KB (1,210 words) - 22:40, 3 January 2024
the subducting slab bends downward. During the transition from basalt to eclogite, these hydrous materials break down, producing copious quantities of water...
67 KB (8,251 words) - 10:32, 3 August 2024
as terranes of lithology in faulted contact with greenschist or rarely eclogite facies rocks. Blueschist, as a rock type, is defined by the presence of...
8 KB (818 words) - 01:11, 4 January 2024
The piclogite phase composition is similar as 20% olivine + 80% eclogite. (2) Eclogite, it is transformed from the Mid-Ocean Ridge Basalt at a depth of...
13 KB (1,441 words) - 17:29, 8 August 2024
of arc volcanism. They are typified by the occurrence of blueschist to eclogite facies metamorphic zones, indicating high-P/low-T metamorphism at low thermal...
38 KB (4,243 words) - 21:59, 13 August 2024
where diamonds form, such as extreme melt depletion or high pressures in eclogites. However, indicator minerals can be misleading; a better approach is geothermobarometry...
139 KB (14,992 words) - 14:29, 12 August 2024
dominant types depending on the mantle parental rocks of the host diamond: eclogite (E-type) and peridotite (P-type). These are the two main parental rocks...
23 KB (2,177 words) - 07:56, 15 April 2024
pressure of metamorphism, these may include greenschist, amphibolite, or eclogite. Basalts are important rocks within metamorphic regions because they can...
69 KB (7,764 words) - 21:21, 8 July 2024
abundance of old granites originating mostly after 2.6 Ga. The occurrence of eclogite (a type of metamorphic rock created by high pressure, > 1 GPa), is explained...
23 KB (2,327 words) - 11:36, 17 July 2024
Eclogite Blueschist Greenschist Prehnite- Pumpellyite Zeolite Granulite Amphibolite Hornfels Sanidinite P (kbar) T (°C) 0 100 200 300 400 500 600 700 800...
17 KB (2,160 words) - 19:36, 4 June 2024
metamorphic rocks. In metamorphic rocks, coesite was initially described in eclogite xenoliths from the mantle of the Earth that were carried up by ascending...
12 KB (1,172 words) - 13:42, 20 July 2024
prehnite-pumpellyite facies to the granulite facies, as well as the blueschist facies and eclogite facies at higher pressures and the contact hornfels facies at lower pressures...
6 KB (683 words) - 00:33, 19 August 2023
crustal thickness, fabrics and metamorphic phase changes: the role of eclogites". Geological Society, London, Special Publications. 76 (1): 325–343. Bibcode:1993GSLSP...
61 KB (6,907 words) - 13:16, 13 August 2024
subducting plates due to their crustal material metamorphosing from basalt into eclogite as they sank. There are well-preserved sedimentary basins, and evidence...
40 KB (4,104 words) - 19:36, 7 August 2024
metamorphosed the rocks to eclogite facies: >2GPa and >700˚C. Specifically, these islands play host to the youngest known coesite-eclogite sample; CA-TIMS dating...
9 KB (1,007 words) - 20:18, 31 July 2024
Schmitt, Harrison Hagan (1964). Petrology and structure of the Eiksundsdal Eclogite Complex, Hareidland, Sunnmøre, Norway (Ph.D.). Harvard University. OCLC 76977172...
37 KB (3,385 words) - 21:23, 10 August 2024
stishovite have been found around impact structures and associated with eclogites formed during ultra-high-pressure metamorphism. The high-temperature forms...
67 KB (6,935 words) - 09:40, 10 August 2024
Eclogite Blueschist Greenschist Prehnite- Pumpellyite Zeolite Granulite Amphibolite Hornfels Sanidinite P (kbar) T (°C) 0 100 200 300 400 500 600 700 800...
12 KB (1,505 words) - 00:11, 17 June 2024
becomes the aluminium-bearing mineral. Some kimberlites contain xenoliths of eclogite, which is considered to be the high-pressure metamorphic product of basaltic...
7 KB (771 words) - 11:39, 28 October 2023
burial and metamorphic compression (but little extra heat) will lead to eclogite facies metamorphism; with more advanced heating the majority of rocks begin...
9 KB (1,012 words) - 14:30, 9 January 2024
surface. Eclogite, a rock similar to basalt in composition, is composed primarily of omphacite (sodic clinopyroxene) and pyrope-rich garnet. Eclogite is associated...
32 KB (3,793 words) - 16:02, 4 April 2024
continental crust is subducted to lithospheric depths for blueschist to eclogite facies metamorphism, and then exhumed along the same subduction channel...
5 KB (435 words) - 05:49, 3 June 2024
at the base of the crust. This transformed the lowest crustal rock from eclogite, a relatively dense rock (3.6 g/cm3) to garnet granulite, which is significantly...
9 KB (846 words) - 20:22, 14 July 2024
the mineralogy of the rock, this metamorphism alters the rock to form eclogite. As the slab of basaltic crust and some included sediments are dragged...
19 KB (2,213 words) - 03:55, 7 August 2024
volatiles such as water and carbon dioxide. During metamorphism of basalt to eclogite in subduction zones, hydrous minerals break down, producing copious quantities...
51 KB (5,769 words) - 18:41, 25 July 2024
reaction. Metamorphic facies included are: BS = Blueschist facies, EC = Eclogite facies, PP = Prehnite-Pumpellyite facies, GS = Greenschist facies, EA =...
6 KB (500 words) - 18:47, 22 July 2023