Stock (geology)

A stock of nordmarkite (quartz-alkali syenite) of Triassic age, in the Gevanim Valley, Makhtesh Ramon, southern Israel.

In geology, a stock is an igneous intrusion that has a surface exposure of less than 100 square kilometres (40 sq mi),^[1] differing from batholiths only in being smaller. A stock has a discordant relationship with the rocks that it intrudes. The term stock usually refers to individual, relatively small plutons, less than 20 km (12 mi) diameter, usually in relative isolation.^[2] Many stocks are cupolas of hidden batholiths.^[3] Circular or elliptical stocks may have been vents feeding former volcanoes.^[4]^[5]

A boss is a small stock.^[6]

Examples

the Alta and Clayton Peak stocks (made of granodiorite), near Park City, Utah^[7]
the Hellroaring Creek and Salal Creek stocks (made of granite-granodiorite and quartz monzonite, respectively) in British Columbia, Canada^[8]^[5]
the Céret stock (made of gabbro and diorite) in Pyrénées-Orientales, France^[9]
the Parashi stock (made of tonalite) in La Guajira Department, Colombia^[10]

References

↑ Gabler, R.E. et al. (2009) Physical Geography (9th edition), Cengage Learning Inc., page 390.
↑ Whittow, John (1984). Dictionary of Physical Geography. London: Penguin, 1984, p. 513. ISBN 0-14-051094-X.
↑ Albert, Fay H. (1947). A Glossary of the Mining and Mineral Industry. Washington, D.C.: Government Printing Office. p. 200.
↑ Kikauka, Andris (1996). Geological, Geochemical, and Diamond Drilling Report on the Salal 1-6 Claims, Pemberton, B.C. (Report). Sooke, British Columbia: Geo-Facts. p. 7.
1 2 Mustard, D. K.; Campbell, C. B. (1971). Salal Creek Molybdenum Property (Report). Government of British Columbia. pp. 6, 7, 8, 9.
↑ Coash, John R. (1967). "Geology of the Mount Velma Quadrangle, Elko County, Nevada". Nevada Bureau of Mines Bulletin. 68: 16.
↑ Cook, Stephen J.; Bowman, John R. (1994). "Contact metamorphism surrounding the Alta stock: Thermal constraints and evidence of advective heat transport from calcite + dolomite geothermometry" (PDF). American Mineralogist. 79: 513–525.
↑ S.G. Soloviev (2011). Compositional Features and Rare Metal Mineralization of the Hellroaring Creek Stock, Southeastern British Columbia (NTS 082F/09) – Geological Fieldwork 2011, Paper 2012-1 (PDF). British Columbia Ministry of Energy, Mines and Petroleum Resources. pp. 181–198.
↑ Aguilar, C.; Liesa, M.; Reche, J.; Powell, R. (2016). "Fluid-fluxed melting and melt loss in a syntectonic contact metamorphic aureole from the Variscan eastern Pyrenees". Journal of Metamorphic Geology. 34 (4): 379–400. doi:10.1111/jmg.12187.
↑ Martínez, Lina Fernanda; Zuluaga C., Carlos A. (2010). "Thermal modeling of pluton emplacement and associated contact metamorphism: Parashi stock emplacement in the Serranía de Jarara (Alta Guajira, Colombia)". Earth Sciences Research Journal. 14 (2).

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[1] Gabler, R.E. et al. (2009) Physical Geography (9th edition), Cengage Learning Inc., page 390.

[2] Whittow, John (1984). Dictionary of Physical Geography. London: Penguin, 1984, p. 513. ISBN 0-14-051094-X.

[3] Albert, Fay H. (1947). A Glossary of the Mining and Mineral Industry. Washington, D.C.: Government Printing Office. p. 200.

[VVK-4] Kikauka, Andris (1996). Geological, Geochemical, and Diamond Drilling Report on the Salal 1-6 Claims, Pemberton, B.C. (Report). Sooke, British Columbia: Geo-Facts. p. 7.

[JH-5] 1 2 Mustard, D. K.; Campbell, C. B. (1971). Salal Creek Molybdenum Property (Report). Government of British Columbia. pp. 6, 7, 8, 9.

[NevBull68-6] Coash, John R. (1967). "Geology of the Mount Velma Quadrangle, Elko County, Nevada". Nevada Bureau of Mines Bulletin. 68: 16.

[CookBowman1994-7] Cook, Stephen J.; Bowman, John R. (1994). "Contact metamorphism surrounding the Alta stock: Thermal constraints and evidence of advective heat transport from calcite + dolomite geothermometry" (PDF). American Mineralogist. 79: 513–525.

[Soloviev2011-8] S.G. Soloviev (2011). Compositional Features and Rare Metal Mineralization of the Hellroaring Creek Stock, Southeastern British Columbia (NTS 082F/09) – Geological Fieldwork 2011, Paper 2012-1 (PDF). British Columbia Ministry of Energy, Mines and Petroleum Resources. pp. 181–198.

[AguilarEtAl2016-9] Aguilar, C.; Liesa, M.; Reche, J.; Powell, R. (2016). "Fluid-fluxed melting and melt loss in a syntectonic contact metamorphic aureole from the Variscan eastern Pyrenees". Journal of Metamorphic Geology. 34 (4): 379–400. doi:10.1111/jmg.12187.

[MartinezAndZuluaga2010-10] Martínez, Lina Fernanda; Zuluaga C., Carlos A. (2010). "Thermal modeling of pluton emplacement and associated contact metamorphism: Parashi stock emplacement in the Serranía de Jarara (Alta Guajira, Colombia)". Earth Sciences Research Journal. 14 (2).