Cerro Aspero Batholith

Cerro Aspero Batholith (Spanish: batolito de Cerro Aspero) is a group of plutons in southern Sierras Pampeanas in central Argentina. The batholith covers an approximate area of 440 km² and lies about 50 km south of the larger Achala Batholith. The batholith contains various circular plutons emplaced by stoping at pressures of 2 kbar or less.[1] Alpa Corral, El Talita and Los Cerros are the three largest individual plutons and together they make up the bulk of the batholith.[1] The most common rock type is monzogranite with biotite and an igneous texture that is equigranular but varies from coarse grained to porphyritic.[1]

The emplacement of plutons occurred in the Middle to Late Devonian period. Contact aureoles for the batholith are, contrary to other batholiths, largely undeformed.[1] The relation of the magmatic episode represented by the Cerro Aspero Batholith to the Famatinian orogeny is not fully understood. Alternatively it is grouped as a "Achaliano" igneous cycle.[1]

Vertical to near-vertical veins of fluorite formed in the Cretaceous occur in the batholith. At most veins reach 3 meters in thickness. Collectively these veins constitute the largest reserves of fluorite in the whole Sierras Pampeanas area.[2]

References

Pinotti, L.P.; Coniglio, J.E.; Esparza, A.M.; D'Eramo, F.J.; Llambías, E.J. (2002). "Nearly circular plutons emplaced by stoping at shallow crustal levels, Cerro Aspero batholith, Sierras Pampeanas de Córdoba, Argentina". Journal of South American Earth Sciences. 15 (2): 251–265. doi:10.1016/S0895-9811(02)00033-0.
Coniglio, Jorge E.; D'eramo, Fernando J.; Pinotti, Lucio P.; Demartis, Manuel; Agulleiro Insúa, Leonardo A.; Petrelli, Hugo A. (2010). "Control estructural de las mineralizaciones de fluorita del batolito Cerro Áspero, Sierras Pampeanas de Córdoba". Revista de la Asociación Geológica Argentina (in Spanish). 67 (4).

32°40′00″S 64°00′00″W

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[Pinoetal2002-1] Pinotti, L.P.; Coniglio, J.E.; Esparza, A.M.; D'Eramo, F.J.; Llambías, E.J. (2002). "Nearly circular plutons emplaced by stoping at shallow crustal levels, Cerro Aspero batholith, Sierras Pampeanas de Córdoba, Argentina". Journal of South American Earth Sciences. 15 (2): 251–265. doi:10.1016/S0895-9811(02)00033-0.

[2] Coniglio, Jorge E.; D'eramo, Fernando J.; Pinotti, Lucio P.; Demartis, Manuel; Agulleiro Insúa, Leonardo A.; Petrelli, Hugo A. (2010). "Control estructural de las mineralizaciones de fluorita del batolito Cerro Áspero, Sierras Pampeanas de Córdoba". Revista de la Asociación Geológica Argentina (in Spanish). 67 (4).