A larvikite quarry in Larvik, Norway, 2008Polished larvikite (marketed as "Blue Pearl Granite"), showing labradorescence, is a popular decorative stone.Light larvikite with a polished surface
Larvikite occurs in the Larvik Batholith (also called the Larvik Plutonic Complex), a suite of ten igneous plutons emplaced in the Oslo Rift (Oslo Graben) surrounded by ~1.1 billion year old Sveconorwegiangneisses. The Larvik Batholith is of Permian age, about 292–298 million years old.[2] Larvikite is also found in the Killala Lake Alkalic Rock Complex near Thunder Bay in Ontario, Canada.[3]
The name originates from the town of Larvik in Norway, where this type of igneous rock is found. Many quarries exploit larvikite in the vicinity of Larvik.
Intrusions of larvikite in Norway form part of the suite of igneous rocks that were emplaced during the Permian period, associated with the formation of the Oslo Rift. The crystallisation of a ternary feldspar indicates that this rock began to crystallise under lower crustal conditions.[1]
Usesedit
Larvikite is prized for its high polish and the labradorescence of its feldspar crystals, and is used as dimension stone, often cladding the facades of commercial buildings and corporate headquarters.[1] It is known informally as Blue Pearl Granite, although this is not an accurate description. Larvikite has been designated by the International Union of Geological Sciences as a Global Heritage Stone Resource.[4]
Referencesedit
^ abcdRamberg I, Bryhni I, Nottvedt A, Rangnes K, eds. (2008). The Making of a Land: Geology of Norway. Trondheim: Norsk Geologisk Forening (Norwegian Geological Association). p. 268. ISBN978-82-92-39442-7.
^"Designation of GHSR". IUGS Subcommission: Heritage Stones. Retrieved 24 February 2019.
External linksedit
Wikimedia Commons has media related to Larvikite.
Journal of Petrology, 1980, volume 21, Number 3, pages 499-531
Structure of the larvikite-lardalite complex, Oslo-region, Norway, and its evolution (abstract) International Journal of Earth Sciences, 1978, volume 67, number 1, pages 330-342
This article related to petrology is a stub. You can help Wikipedia by expanding it.
larvikite, igneous, rock, specifically, variety, monzonite, notable, presence, thumbnail, sized, crystals, feldspar, these, feldspars, known, ternary, because, they, contain, significant, components, three, endmember, feldspars, feldspar, partly, unmixed, micr. Larvikite is an igneous rock specifically a variety of monzonite 1 notable for the presence of thumbnail sized crystals of feldspar These feldspars are known as ternary because they contain significant components of all three endmember feldspars 1 The feldspar has partly unmixed on the micro scale to form a perthite and the presence of the alternating alkali feldspar and plagioclase layers give its characteristic silver blue schiller effect called labradorescence on polished surfaces Olivine can be present along with apatite and locally quartz Larvikite is usually rich in titanium with titanaugite and or titanomagnetite present LarvikiteIgneous rockLarvikite from Larvik NorwayCompositionPlagioclase alkali feldspar amphiboleA larvikite quarry in Larvik Norway 2008Polished larvikite marketed as Blue Pearl Granite showing labradorescence is a popular decorative stone Light larvikite with a polished surfaceLarvikite occurs in the Larvik Batholith also called the Larvik Plutonic Complex a suite of ten igneous plutons emplaced in the Oslo Rift Oslo Graben surrounded by 1 1 billion year old Sveconorwegian gneisses The Larvik Batholith is of Permian age about 292 298 million years old 2 Larvikite is also found in the Killala Lake Alkalic Rock Complex near Thunder Bay in Ontario Canada 3 The name originates from the town of Larvik in Norway where this type of igneous rock is found Many quarries exploit larvikite in the vicinity of Larvik Contents 1 Formation 2 Uses 3 References 4 External linksFormation editIntrusions of larvikite in Norway form part of the suite of igneous rocks that were emplaced during the Permian period associated with the formation of the Oslo Rift The crystallisation of a ternary feldspar indicates that this rock began to crystallise under lower crustal conditions 1 Uses editLarvikite is prized for its high polish and the labradorescence of its feldspar crystals and is used as dimension stone often cladding the facades of commercial buildings and corporate headquarters 1 It is known informally as Blue Pearl Granite although this is not an accurate description Larvikite has been designated by the International Union of Geological Sciences as a Global Heritage Stone Resource 4 References edit a b c d Ramberg I Bryhni I Nottvedt A Rangnes K eds 2008 The Making of a Land Geology of Norway Trondheim Norsk Geologisk Forening Norwegian Geological Association p 268 ISBN 978 82 92 39442 7 Larvikite geology Sage R P 1988 Geology of Carbonatite Alkalic Rock Complexes in Ontario Killala Lake Alkalic Rock Complex District of Thunder Bay Ontario Geological Survey Study 45 PDF Toronto Ontario Geological Survey and Ministry of Northern Development and Mines pp 9 18 ISBN 0 7729 0580 0 Designation of GHSR IUGS Subcommission Heritage Stones Retrieved 24 February 2019 External links edit nbsp Wikimedia Commons has media related to Larvikite Petrogenesis of the Oslo Region Larvikites and Associated Rocks abstract Journal of Petrology 1980 volume 21 Number 3 pages 499 531 Structure of the larvikite lardalite complex Oslo region Norway and its evolution abstract International Journal of Earth Sciences 1978 volume 67 number 1 pages 330 342 nbsp This article related to petrology is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Larvikite amp oldid 1144563912, wikipedia, wiki, book, books, library,
