Map of the geology of western Taitao Peninsula. Taitao granites and Taitao ophiolites would be mainly focused on in this part. Chile ridge is located west of the Taitao Peninsula, and the geology of Chile Ridge is closely associated with that of Taitao Peninsula.[1][2][3]

Taitao ophiolite (Spanish: Ofiolita de Taitao) is an ophiolite in Taitao Peninsula of western Patagonia, Chile. The ophiolite crops out about 10 km w to the east of the Peru-Chile trench and 50 km to the south of Chile Triple Junction —two features to which it is related.[4][5]

The ophiolite formed in connection to the subduction of the Chile Rise, a mid-ocean ridge, beneath South America.[4] More specifically it has been proposed that the ophiolite formed in a rift of the forearc region of the South American plate.[6]

The Taitao ophiolite presents a pseudostratigraphy with the following lithologies; peridotite, pyroxenite, gabbro, sheeted dykes of diabase, pillow lava and sedimentary rock.[4][5]

References

  1. ↑ Anma, Ryo; Armstrong, Richard; Orihashi, Yuji; Ike, Shin-ichi; Shin, Ki-Cheol; Kon, Yoshiaki; Komiya, Tsuyoshi; Ota, Tsutomu; Kagashima, Shin-ichi; Shibuya, Takazo (November 2009). "Are the Taitao granites formed due to subduction of the Chile ridge?" (PDF). Lithos. 113 (1–2): 246–258. Bibcode:2009Litho.113..246A. doi:10.1016/j.lithos.2009.05.018. hdl:2241/104215. ISSN 0024-4937.
  2. ↑ Veloso, Eugenio E; Anma, Ryo; Yamaji, Atsushi (January 2009). "Ophiolite Emplacement and the Effects of the Subduction of the Active Chile Ridge System: Heterogeneous Paleostress Regimes Recorded in the Taitao Ophiolite (Southern Chile)". Andean Geology. 36 (1). doi:10.4067/s0718-71062009000100002. ISSN 0718-7106.
  3. ↑ Bourgois, Jacques; Lagabrielle, Yves; Martin, Hervé; Dyment, Jérôme; Frutos, Jose; Cisternas, Maria Eugenia (2016), A Review on Forearc Ophiolite Obduction, Adakite-Like Generation, and Slab Window Development at the Chile Triple Junction Area: Uniformitarian Framework for Spreading-Ridge Subduction, Pageoph Topical Volumes, Cham: Springer International Publishing, pp. 3217–3246, doi:10.1007/978-3-319-51529-8_2, ISBN 978-3-319-51528-1, retrieved 2021-11-10
  4. 1 2 3 Keading, M.; Forsythe, R.D.; Nelson, E.P. (1990). "Geochemistry of the Taitao ophiolite and near-trench intrusions from the Chile margin triple junction". Journal of South American Earth Sciences. 3 (4): 161–177. Bibcode:1990JSAES...3..161K. doi:10.1016/0895-9811(90)90001-H.
  5. 1 2 Schulte, Ruth F.; Schilling, Manuel; Anma, Ryo; Farquhar, James; Horan, Mary F.; Komiya, Tsuyoshi; Piccoli, Philip M.; Pitcher, Lynnette; Walker, Richard J. (2009). "Chemical and chronologic complexity in the convecting upper mantle: Evidence from the Taitao ophiolite, southern Chile". Geochimica et Cosmochimica Acta. 73 (19): 5793–5819. Bibcode:2009GeCoA..73.5793S. doi:10.1016/j.gca.2009.06.015.
  6. ↑ Nelson, Eric; Forsythe, Randall; Diemer, John; Allen, Mike (1993). "Taitao ophiolite: a ridge collision ophiolite in the forearc of southern Chile (46°S)". Revista Geológica de Chile. 20 (2): 137–165. Retrieved December 23, 2018.



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