A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than 1 cm (0.4 in) and sometimes...
29 KB (3,231 words) - 01:42, 31 May 2024
Spruce Pine Mining District (redirect from Spruce Pine pegmatite district)
the eastern edge by the Blue Ridge Front. The pegmatites intruded into the Ashe Formation. The pegmatites and country rock are part of the Spruce Pine...
7 KB (697 words) - 06:19, 11 August 2024
The Harding Pegmatite Mine is a former adit mine that extracted lithium, tantalum, and beryllium from a Precambrian pegmatite sill. It ceased operations...
12 KB (1,498 words) - 23:04, 3 November 2023
The Tin Mountain pegmatite is an igneous intrusion located in the southern Black Hills, South Dakota. It is a part of the Harney Peak Granite dome that...
6 KB (754 words) - 11:46, 20 June 2024
granites, pegmatites, and schists, and "books" (large individual crystals) of mica several feet across have been found in some pegmatites. Micas are...
42 KB (4,861 words) - 21:47, 8 August 2024
Maine Mineral and Gem Museum (category Pegmatite mines)
exhibits—all designed to inspire visitors about Maine's geologic history, pegmatite mining, and our planet's place in the solar system. The museum was formed...
8 KB (835 words) - 17:53, 6 July 2024
Duncan Mountains (redirect from Pegmatite Point)
visited the point and gave the name because of the abundance of the rock Pegmatite. 84°56′S 166°56′W / 84.933°S 166.933°W / -84.933; -166.933. A Y-shaped...
9 KB (1,263 words) - 16:49, 15 January 2024
Lepidolite is found with other lithium-bearing minerals, such as spodumene, in pegmatite bodies. It has also been found in high-temperature quartz veins, greisens...
10 KB (980 words) - 14:16, 8 August 2024
possesses a hexagonal crystal system. Aquamarine mainly forms in granite pegmatites and hydrothermal veins, and it is a very lengthy process that can take...
25 KB (2,303 words) - 01:46, 30 June 2024
of these are concentrated in exceptionally coarse-grained rocks called pegmatites that are typically found in dikes and veins near larger igneous masses...
45 KB (5,027 words) - 05:47, 24 August 2024
Lithium, Tin Pilbara Craton Archean Environment: Magmatic, Group: Pegmatite, Type: LCT pegmatite Pilgangoora (Altura) Pilgangoora (Altura Mining) Western Australia...
29 KB (2,431 words) - 22:17, 8 September 2024
noted in beryl dissolution cavities at the Noumas II Pegmatite, part of the Orange River pegmatite belt in the Northern Cape of South Africa. Large crystals...
8 KB (705 words) - 20:06, 18 January 2024
Medina Peaks (redirect from Pegmatite Peak)
the Ross Ice Shelf. From the south, features include Patterson Peak, Pegmatite Peak, Feeney Peak, Feeney Col and Hidden Col. Along the Ross Ice Shelf...
7 KB (1,208 words) - 16:38, 5 January 2024
(2023-12-08). "Connoisseur's Choice: Topaz from Granite Pegmatites: Limoeiro Mine, Virgem da Lapa, Araçuaí Pegmatite District, Minas Gerais, Brazil". Rocks & Minerals...
28 KB (3,067 words) - 13:42, 22 July 2024
photosensitive and subject to fading. The first crystals were found in a pegmatite found near Rumford, Maine, US, and in Minas Gerais, Brazil. The crystals...
61 KB (5,748 words) - 20:28, 3 September 2024
Western Cape Sweden: Skuleboda mine, Västra Götaland County: found in pegmatite United States: Colorado: Deer Trail, Arapahoe County:233 Custer County:234...
15 KB (1,441 words) - 03:31, 26 June 2024
minerals; this is called a pegmatite. The high water content of the magma made it possible for the crystals to grow quickly, so pegmatite crystals are often quite...
22 KB (2,496 words) - 13:08, 11 September 2024
margins of granitic intrusions. In some locations, very coarse-grained pegmatite masses occur with granite. Granite forms from silica-rich (felsic) magmas...
57 KB (6,589 words) - 13:07, 12 September 2024
Retrieved July 1, 2024. "Centennial Cone pegmatite (K. L. Green Ranch), Centennial Cone, Clear Creek pegmatite Province, Jefferson County, Colorado, USA"...
4 KB (207 words) - 20:55, 1 July 2024
In southern Greenland, the Illimaussaq alkaline complex consists of pegmatites such as nepheline, syenites (especially kakortokite or naujaite) and sodalite...
179 KB (16,911 words) - 16:09, 16 September 2024
Brazilian emerald (grass-green variety of the mineral beryl) in a quartz-pegmatite matrix with typical hexagonal, prismatic crystals....
40 KB (3,740 words) - 04:54, 14 September 2024
influential actor in the study of pegmatite geology. Although she did not begin her career in the study of pegmatite, it became her niche as her career...
10 KB (1,319 words) - 06:04, 22 December 2023
commonly found in phosphate-rich pegmatites. It occurs in the form of perfect crystals grouped in druses, in pegmatites, and is often of precious-stone...
13 KB (1,430 words) - 21:41, 24 May 2024
Whoopie pie Fossil Pertica quadrifaria Gemstone Tourmaline Rock Granitic pegmatite Ship Bowdoin Soil Chesuncook soil State route marker State quarter Released...
111 KB (10,306 words) - 14:45, 17 September 2024
refined for use in industry. Spodumene occurs in lithium-rich granite pegmatites and aplites. Associated minerals include: quartz, albite, petalite, eucryptite...
16 KB (1,427 words) - 13:56, 18 July 2024
aplites form in close association with pegmatites, which are otherwise uncommon in granites. These aplite-pegmatite sheet complexes may show fine-scale banding...
5 KB (513 words) - 23:05, 8 September 2024
described in 1983 for an occurrence in a pegmatite in the Kola peninsula, Russia. It has also been reported from a pegmatite complex in Florence County, Wisconsin...
3 KB (154 words) - 13:42, 20 February 2023
spodumene hard-rock. The two largest pegmatites (known as the Carriere de l'Este Pegmatite and the Roche Dure Pegmatite) are each of similar size or larger...
141 KB (13,796 words) - 23:50, 11 September 2024
world in zoned pegmatites, associated with the more commercially important lithium minerals, lepidolite and petalite. Within the pegmatites, the large grain...
93 KB (10,072 words) - 07:28, 12 September 2024
is widely distributed in nature. It is found most commonly in granitic pegmatites, but also occurs in mica schists, such as those of the Ural Mountains...
33 KB (3,168 words) - 12:42, 12 September 2024