Pegmatite - Wikipedia
网页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 greater than 1 meter (3 ft). Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite.
Pegmatite: Igneous Rock - Pictures, Definition & More - Geology.com
网页Pegmatites are extreme igneous rocks that form during the final stage of a magma’s crystallization. They are extreme because they contain exceptionally large crystals and they sometimes contain minerals that are rarely found in other types of rocks.
Pegmatite | Igneous, Minerals, Crystals | Britannica
网页Pegmatite, almost any wholly crystalline igneous rock that is at least in part very coarse grained, the major constituents of which include minerals typically found in ordinary igneous rocks and in which extreme textural variations, especially in grain size, are characteristic.
Pegmatite Rocks: Identification, Characteristics, Pictures, and …
网页2024年4月30日 · Pegmatite rocks form from the slow cooling of molten rock deep within the Earth’s crust. These unique rocks are a result of specific geological processes that involve the crystallization of minerals in large cavities within the cooling magma.
Pegmatite | Properties, Composition, Formation, Uses, Occurrence
网页2019年4月12日 · Pegmatite is the host rock for numerous mineral deposits and can be the commercial sources of beryllium, bismuth, tin, titanium, tungsten, niobium, and many other elements. Large sheets of mica are often mined from pegmatite and used to make components electronic devices, circuit boards, optical filters, detector windows, and …
伟晶岩 - 百度百科
网页伟晶岩（Pegmatite），指由巨粒矿物组成的淡色结晶岩，是富含挥发分的硅酸盐残浆，侵入到火成岩或围岩裂隙中缓慢结晶而成的。 一般呈肉红色、灰白色，具有巨粒或 粗粒 结构的酸性至碱性 脉岩 。
Pegmatite: An Intrusive Igneous Rock - ThoughtCo
网页2018年6月13日 · Pegmatite is an extremely coarse-grained intrusive igneous rock composed of large interlocking crystals. There is no defined mineralogy for pegmatite; any plutonic rock may form pegmatite. The most common type of pegmatite is made of granite.
Episodes of fast crystal growth in pegmatites - Nature
网页2020年10月5日 · Pegmatites are shallow, coarse-grained magmatic intrusions with crystals occasionally approaching meters in length. Compared to their plutonic hosts, pegmatites are thought to have cooled rapidly,...
Pegmatite - Igneous Rocks - Sandatlas
网页Pegmatite is an exceptionally coarse-grained plutonic igneous rock. Most pegmatites have a mineralogical composition of granite but composition has no defining importance here. Pegmatites may have any imaginative magmatic composition and they are actually known to contain a large number of unusual minerals. Pegmatite is a very coarse-grained ...
Pegmatite - SpringerLink
网页Pegmatites are holocrystalline usually leucocratic rocks that are, at least in part, exceptionally coarse-grained, and in which extreme variations in grain size are widespread. Their dominant constituents are minerals typically found in ordinary igneous rocks. Some pegmatites also contain less common minerals.