Cerro de los Chenques

Cerro de los Chenques
Highest point
Coordinates Coordinates: 44°52′25″S 70°03′49″W / 44.87361°S 70.06361°W / -44.87361; -70.06361 [1]

Cerro de los Chenques is a monogenetic volcano in the Chubut Province,[2] Argentina, which is considered to be of Holocene age.[1] The volcano developed on a basement formed by Mesoproterozoic and Neoproterozoic rocks and more recent volcanic and granitic formations.[3]

The volcano is source of lava flows and pyroclastics.[3] Cerro de los Chenques has erupted rocks ranging from alkali basalt to basanite, which contain phenocrysts ranging from clinopyroxene, olivine and plagioclase.[1]

It is considered part of the Patagonian basaltic volcanics, which take place behind the main volcanic arc[1] and are considered to be backarc volcanism. Such volcanics take the form of large volcanic plateaus.[2] These volcanic are noted for their xenoliths which have been used to infer the composition of the mantle.[4]

References

  1. 1 2 3 4 Rivalenti et al. 2007, p. 47.
  2. 1 2 Jr, Norberto Rieck; Conceição, Rommulo Vieira; Koester, Edinei; Dantas, Celine (1 April 2007). "O manto litosférico continental na região do Cerro de Los Chenques, Argentina: evidências de heterogeneidade e metassomatismo". Geologia USP. Série Científica (in Portuguese). 7 (1): 2. doi:10.5327/Z1519-874x2007000100001. ISSN 2316-9095.
  3. 1 2 Dantas, C.; Grégoire, M.; Koester, E.; Conceição, R.V.; Rieck, N. (January 2009). "The lherzolite–websterite xenolith suite from Northern Patagonia (Argentina): Evidence of mantle–melt reaction processes". Lithos. 107 (1–2): 108. doi:10.1016/j.lithos.2008.06.012. ISSN 0024-4937.
  4. ↑ Rivalenti et al. 2007, p. 45.

Sources

  • Rivalenti, Giorgio; Mazzucchelli, Maurizio; Zanetti, Alberto; Vannucci, Riccardo; Bollinger, Claire; Hémond, Christophe; Bertotto, Gustavo W. (November 2007). "Xenoliths from Cerro de los Chenques (Patagonia): An example of slab-related metasomatism in the backarc lithospheric mantle". Lithos. 99 (1–2): 45–67. doi:10.1016/j.lithos.2007.05.012. ISSN 0024-4937.
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