Evidence of Transpressional Tectonics in the Western Cordillera of Central Peru (11° - 12°30' S)
DOI:
https://doi.org/10.47347/incasciences.v1i2.32Keywords:
Western Cordillera, transpressional, tectonics, strike-slip systemsAbstract
The Andes of Central Peru, located between latitudes 11° and 12°30’ south, exhibit a geological record that reveals successive stages of deformation that affected the orogeny from the Campanian to the Maastrichtian and Eocene. During the Mesozoic, sedimentation was controlled by extensional tectonics, but in the Cenozoic, these sequences were deformed due to the tectonic inversion of ancient faults. This resulted in a significant transcurrent system that played a decisive role in shaping the structural configuration of the Andean orogeny, composed of volcanic and volcanosedimentary rocks. The tectonic events are manifested in the form of tectonic scales, folds, and positive flower structures that have shaped this part of the Western Cordillera.
References
Ángeles, C. (1987). Les chevauchements de la Cordillère Occidentale par 12°15’ (Andes du Pérou Central). These 3° cycle Univ.S.T.L., Montpellier, 184 p.
Carrera N., Muñoz J.A., Sabat F., R. Mon R.& Roca E. (2006). The role of inversion tectonics in the structure of the Cordillera Oriental (NW Argentinean Andes). Journal of Structural Geology 28 1921-1932.
Cobbing, J (1973). Geología de los cuadrángulos de Barranca, Ámbar, Oyón, Huacho, Huaral y Canta. Boletín INGEMMET. Serie A-26: Carta Geológica Nacional, 172p.
DeCelles P.G., Zandt G., Beck S.L., Currie C.A., Ducea M.N., Kapp P., Gehrels G.E., Carrapa B., Quade J. & Schoenbohm L.M. (2015). Cyclical orogenic processes in the Cenozoic central Andes. The Geological Society of America Memoir 212, p: 459-490.
Drozdzewski G. & Mon R. (1999). Oppositely-verging thrusting structures in the North Argentine Andes compared with the German Variscides. Acta Geologica Hispanica, v. 34, nº 2-3, p. 185-196.
Farías M., Charrier R., Comte D., Martinod J., & Gérard Hérail G. (2005). Late Cenozoic deformation and uplift of the western flank of the Altiplano: Evidence from the depositional, tectonic, and geomorphologic evolution and shallow seismic activity (northern Chile at 19°30’ S). Tectonics, Vol. 24, TC4001, DOI: 10.1029/2004TC001667.
Harrison, J. (1960). Structural doubts about the Andes of Peru. Internat. Geol. Congr., 21st Sess., Proc., pt. 18, p. 7-13.
Lebinson F., Turienzo M., Sánchez N., Cristallini E., Araujo V. & Dimieri L. (2020). Kinematics of a backthrust system in the Agrio fold and thrust belt, Argentina: Insights from structural analysis and analogue models. Journal of South American Earth Sciences. 100, 7-4, p: 1-18.
Megard, F. (1984). The andean orogenic period and its major structures in central and northerh Peru. Journal of the Geological Society, London, 141: 893-900.
Muñoz, N., & R. Charrier (1996). Uplift of the western border of the Altiplano on a west-vergent thrust system, northern Chile. Journal of South American Earth Sciences, 9, 171 – 181.
Muñoz, N., & Sepúlveda P. (1992). Estructuras compresivas con vergencia al oeste en el borde oriental de la Depresión Central, norte de Chile (19°15’S). Revista Geológica de Chile, 19, 241-247.
Romani, M. (1982). Géologie de la région minière Uchucchacua Hacienda Otuto, Pérou. Thèse 3eme cycle, Grenoble, 176 pp.
Salazar, H. (1983). Geología de los cuadrángulos de Matucana y Huarochirí. Boletín INGEMMET, N° 36, Serie A: Carta Geológica Nacional, 71p.
Szekely, T. (1967). Geology near Huallacocha lakes, central high Andes, Peru. American Association of Petroleum Geologists Bulletin, V. 51 (7), p: 1346-1353.
Szekely, T. (1969). Structural geology, Cochas to Yauricocha, central High Andes, Peru. American Association of Petroleum Geologists Bulletin 53(3): 553-567.
Terrones, A. (1949). La estratigrafía del distrito minero de Morococha. Boletín de la Sociedad Geológica del Perú, v. 2 (8), pp. 1-15.
Victor, P.; Oncken, O.& Glodny, J. (2004). Uplift of the western Altiplano plateau: Evidence from the Precordillera between 20° and 21°S (northern Chile). Tectonics, 23: TC400. DOI: 10.1029/2003TC001519.
Wilson, J. (1963). Cretaceous stratigraphy of central Andes of Peru. American Association of Petroleum Geologists Bulletin., V. 47, p. 1-34.
Zimmernink, W. (1985). Geology and mineralogy of Felicidad and Santander: two Peruvian skarn-type deposits in Cretaceous (sedimentary) host rock (with a case study of various garnet types). Doktorwurde der Naturwissenschaftlich - Mathematisch, Ruprecht-Karls Universität, Heidelberg:1985,170 p.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2023 Yuly Mamani, Javier Jacay
This work is licensed under a Creative Commons Attribution 4.0 International License.