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- Leucogranite abstract "In geology, leucogranites are light colored granitic rocks with almost no dark minerals. Alaskite is a synonym.Leucogranites have been reported from a variety of orogenies involving continental collisions. Examples include the Black Hills (Trans-Hudson orogeny of Proterozoic age), the Blue Ridge basement complex (Grenville orogeny of Proterozoic age), the Paleozoic Appalachian orogeny in Maine, and the currently active Himalayan orogeny. The leucogranite magmas are interpreted to have been derived by melting of pelitic rocks in the upper portions of thickened crust. These melts result following deformation and metamorphism, but the heat source is uncertain. Shear-heating associated with large shear zones in the crust has been proposed as the mechanism.A study of sodium rich quartz-alkali feldspar—biotite gneiss granulite facies terrane in the Kerala Khondalite Belt near Manali in South India found that in situ leucosomes (light colored segregations) within the gneiss showed the development of garnet replacing the dark biotite. The study indicated localized melting or migmatization within the gneiss. This was followed by intrusion of the gneiss by garnet-bearing leucogranitic melts both parallel and discordant to the foliation of the gneiss. Strontium isotope ratios of the leucogranite intrusives are distinct from that of the gneiss and associated leucosomes. This indicates the leucogranite melts were not derived from the local gneiss, however the gneiss is isotopically variable and the leucogranite could have derived from subjacent gneiss.".
- Leucogranite thumbnail Alaskite_Colorado.jpg?width=300.
- Leucogranite wikiPageID "6365645".
- Leucogranite wikiPageRevisionID "571253793".
- Leucogranite caption "Leucogranite from Colorado, USA, containing potassium feldspar and quartz.".
- Leucogranite hasPhotoCollection Leucogranite.
- Leucogranite imageSize "300".
- Leucogranite name "Leucogranite".
- Leucogranite type "Igneous".
- Leucogranite subject Category:Granitic_rocks.
- Leucogranite subject Category:Ultrapotassic_rocks.
- Leucogranite type GraniticRocks.
- Leucogranite type NaturalObject100019128.
- Leucogranite type Object100002684.
- Leucogranite type PhysicalEntity100001930.
- Leucogranite type Rock109416076.
- Leucogranite type UltrapotassicRocks.
- Leucogranite type Whole100003553.
- Leucogranite comment "In geology, leucogranites are light colored granitic rocks with almost no dark minerals. Alaskite is a synonym.Leucogranites have been reported from a variety of orogenies involving continental collisions. Examples include the Black Hills (Trans-Hudson orogeny of Proterozoic age), the Blue Ridge basement complex (Grenville orogeny of Proterozoic age), the Paleozoic Appalachian orogeny in Maine, and the currently active Himalayan orogeny.".
- Leucogranite label "Leucogranite".
- Leucogranite label "Leucogranite".
- Leucogranite label "Leucograniti".
- Leucogranite label "Leukogranit".
- Leucogranite sameAs Leukogranit.
- Leucogranite sameAs Leucogranite.
- Leucogranite sameAs Leucograniti.
- Leucogranite sameAs m.0g2mzc.
- Leucogranite sameAs Q1091688.
- Leucogranite sameAs Q1091688.
- Leucogranite sameAs Leucogranite.
- Leucogranite wasDerivedFrom Leucogranite?oldid=571253793.
- Leucogranite depiction Alaskite_Colorado.jpg.
- Leucogranite isPrimaryTopicOf Leucogranite.
