Coastal Batholith of central Chile

Igneous rock formation in central Chile

Coastal Batholith of central Chile

Stratigraphic range: Pennsylvanian
322.0–297.6 Ma

PreꞒ

Araucarias growing on top of rocks of the Coastal Batholith, Cordillera de Nahuelbuta

Type| Batholith
Unit of| Central Chile, Andes
Lithology
Primary| Calc-alkaline magma series
Location
Location| Chilean Coast Range
Coordinates| 37°30′S 73°00′W﻿ / ﻿37.500°S 73.000°W﻿ / -37.500; -73.000
Region| Araucanía, Biobío, Los Ríos, Maule, O'Higgins, Santiago Metropolitan & Valparaíso Regions
Country|  Chile

Geological sketch map of central Chile 33° and 40°S with the Coastal Batholith and rocks of the accretionary metamorphic prism - age data are U-Pb zircon crystallization ages

The Coastal Batholith of central Chile is a group of plutons in the Chilean Coast Range of Central Chile appearing contiguously from 33° S to 38° S.[1][2] At a latitude of 40° S an outlying group of plutons of the batholith appear in a more eastward position in the Andes.[1]

Together with the Elqui-Limarí Batholith and the Colangüil Batholith, the Coastal Batholith of central Chile is a remnant of the volcanic arcs that erupted the volcanic material of the Choiyoi Group. During the Permian the zone of arc magmatism moved from the Coastal Batholith 350 km inland reaching San Rafael about 280 million years ago.[2] The batholith is emplaced amidst metamorphic rocks belonging to a Paleozoic accretionary complex. The northern parts are of the batholith are themselves intruded by Jurassic gabbros.[1]

Rocks of the batholith belong to the calc-alkaline magma series.[3]

## References

[edit]

1. ^ a b c Deckart, Katja; Hervé, Francisco; Fanning, C. Mark; Ramírez, Valeria; Calderón, Mauricio; Godoy, Estanislao (2014). "U-Pb Geochronology and Hf-O Isotopes of zircons from the Pennsylvanian Coastal Batholith, South-Central Chile". Andean Geology. 41 (1). doi:10.5027/andgeoV41n1-a03. hdl:1885/57884. Retrieved 5 January 2016.
2. ^ a b Kleiman, Laura E.; Japas, María S. (2009). "The Choiyoi volcanic province at 34°S–36°S (San Rafael, Mendoza, Argentina): Implications for the Late Palaeozoic evolution of the southwestern margin of Gondwana". Tectonophysics. 473 (3–4): 283–299\. Bibcode:2009Tectp.473..283K. doi:10.1016/j.tecto.2009.02.046. hdl:11336/75328. Retrieved 5 January 2016.3–4&rft.pages=283-299&rft.date=2009&rft_id=info:hdl/11336/75328&rft_id=info:doi/10.1016/j.tecto.2009.02.046&rft_id=info:bibcode/2009Tectp.473..283K&rft.aulast=Kleiman&rft.aufirst=Laura+E.&rft.au=Japas,+María+S.&rft_id=https://www.researchgate.net/publication/241406241&rfr_id=info:sid/en.wikipedia.org:Coastal+Batholith+of+central+Chile" class="Z3988">
3. ^ Hervé, F.; Faundez, V.; Calderón, M.; Massonne, H.-J.; Willner, A.P. (2007). "Metamorphic and plutonic basement complexes". In Moreno, Teresa; Gibbons, Wes (eds.). The Geology of Chile. Geological Society of London. pp. 7–20.7-20&rft.pub=Geological+Society+of+London&rft.date=2007&rft.aulast=Hervé&rft.aufirst=F.&rft.au=Faundez,+V.&rft.au=Calderón,+M.&rft.au=Massonne,+H.-J.&rft.au=Willner,+A.P.&rfr_id=info:sid/en.wikipedia.org:Coastal+Batholith+of+central+Chile" class="Z3988">

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Geology of Chile

Terranes|

* Arequipa-Antofalla
* Chaitenia
* Chilenia
* Chiloé
* Cuyania
* Fitz Roy
* Madre de Dios
* Mejillonia
* Patagonia

Sedimentary
formations
and groups|

| Cenozoic|

| Neogene|

* Abanico Fm.
* Angostura Fm.
* Ayacara Fm.
* Bahía Inglesa Fm.
* Caldera Beds
* Caleta Godoy Fm.
* Caleta Herradura Fm.
* Campanario Fm.
* Chaicayán Gp.
* Cheuquemó Fm.
* Cholchol Fm.
* Chucal Fm.
* Cola de Zorro Fm.
* Coquimbo Fm.
* Cura-Mallín Gp.
* Farellones Fm.
* La Cascada Fm.
* Lacui Fm.
* La Montaña Fm.
* La Portada Fm.
* Lauca Fm.
* Malleco Fm.
* Mininco Fm.
* Navidad Fm.
* Oxaya Fm.
* Parga Fm.
* Puduhuapi Fm.
* Pupunahue Beds
* Quebrada Macusa Fm.
* Ranquil Fm.
* Río Frías Fm.
* San Pedro Beds
* Santo Domingo Fm.
* Temuco Fm.
* Traiguén Fm.
* Trapa-Trapa Fm.
* Tubul Fm.
* Vargas Fm.

|

Paleogene|

* Abanico Fm.
* Azapa Fm.
* Caleta Chonos Fm.
* Cheuquemó Fm.
* Cura-Mallín Gp.
* La Cascada Fm.
* Lebu Gp.
* Loreto Fm.
* Lupica Fm.
* Oxaya Fm.
* Parga Fm.
* Purilactis Gp.
* Pupunahue Beds
* Temuco Fm.
* Vargas Fm.

Mesozoic|

| Cretaceous|

* Baños del Flaco Fm.
* Cerro Colorado Fm.
* Chacarilla Fm.
* Chañarcillo Gp.
* Coihaique Gp.
* Divisadero Gp.
* Dorotea Fm.
* Hornitos Fm.
* La Liga Fm.
* Ñirehuao Fm.
* Punta del Cobre Fm.
* Purilactis Gp.
* Quiriquina Fm.
* Viñita Fm.
* Way Gp.
* Zapata Fm.

|

Jurassic|

* Chacarilla Fm.
* Coihaique Gp.
* Ibáñez Fm.
* La Liga Fm.
* La Negra Fm.
* Nacientes del Biobío Fm.
* Nacientes del Teno Fm.
* Pan de Azúcar Fm.
* Tobífera Fm.

Triassic|

* Canto del Agua Fm.
* Choiyoi Gp.
* Panguipulli Fm.
* Santa Juana Fm.
* Tralcán Fm.

Paleozoic|

* Llano de Chocolate Beds

Batholiths|

* Coastal central Chile
* Elqui-Limarí
* Futrono-Riñihue
* North Patagonian
* Panguipulli
* South Patagonian
* Vicuña Mackenna

Metamorphic
complexes|

* Bahía Mansa
* Belén
* Chañaral
* Choapa
* Chonos
* Cordillera Darwin
* Eastern Andes
* Mejillones
* Puerto Edén
* Punta de Choros
* Quebrada del Carrizo
* Trafún
* Tierra del Fuego

Faults|

* Atacama Fault
* Biobío-Aluminé Fault
* Cachet Fault
* Domeyko Fault
* El Arrayán Fault
* Futrono Fault
* Gastre Fault
* Lanalhue Fault
* Liquiñe-Ofqui Fault
* Magallanes-Fagnano Fault
* Mocha-Villarrica Fault
* Pichilemu Fault
* Reigolil-Pirihueico Fault
* San Ramón Fault
* Valeriano Fault

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