Casiri
Paucarani, Paugarani
Highest point
Elevation5,650 m (18,540 ft)
Coordinates17°28′S 69°48′W / 17.467°S 69.800°W / -17.467; -69.800[1]
Geography
Casiri is located in Peru
Casiri
Casiri

Casiri, also known as Paucarani, is an about 5,650 metres (18,537 ft) high complex volcano in the Barroso mountain range of the Andes, in the Tacna Region of Peru. It consists of four individual volcanic edifices with lava domes; the southeasternmost edifice has been active during the Holocene, producing thick lava flows that have overrun moraines of Pleistocene age. The youngest lava flow has been dated to 2,600 ± 400 years ago. Although no historical eruptions are known, the volcano is considered to be potentially active and is monitored.

The volcano features geothermal manifestations and is linked to a larger geothermal field that has been prospected for geothermal power generation. There are two sulfur mines on the volcano, and the Paucarani reservoir that contains the bulk of Tacna's water supply is associated with Casiri: The Rio Uchusuma that flows through the reservoir originates on the volcano and the reservoir is located on the foot of Casiri.

Name

The name "Casiri" might mean "bawler" in Aymara.[2] Casiri is also known as Paucarani[3] or Paugarani,[1] although Casiri and Paucarani are sometimes treated as distinct volcanoes.[4] A lake with the name "Casiri" lies about 5 kilometres (3.1 mi) north from the volcano;[5] it is a glacial lake[6] and a reservoir[7] which drains into the Mauri River through the Quebrada Chungara and Rio Kallapuma.[8]

Geography and geomorphology

Casiri is a 5,650 metres (18,540 ft) high[1] stratovolcano with lava domes[9] in the Palca district of Peru,[10] close to the border with Chile.[11] There are five[12] or four individual volcanic edifices at Casiri: three older ones that form a 5 kilometre-long chain, and a southeasterly younger edifice with a well preserved lava dome in its crater[1] which is breached to the south.[11] An older lava dome lies[13] in the western part of the complex.[14] The whole Casiri volcano grew on the southern flanks of older volcanoes[11] and rises about 1,050 metres (3,440 ft) above the surrounding terrain.[15] The edifice has a volume of about 7 cubic kilometres (1.7 cu mi), with a diameter of 5 kilometres (3.1 mi).[15] A cirque with a rock glacier is developed on a summit northeast from the main Casiri complex. Close to the Paucarani reservoir is a debris avalanche deposit.[12]

Lava flows, stubby[11] and 50–100 metres (160–330 ft)[12] thick owing to viscosity,[16] originate on the younger edifice[13] and spread in several directions.[16] The flows reach widths of 50–500 metres (160–1,640 ft),[12] lengths of 2 kilometres (1.2 mi)[1] and are well preserved, displaying flow lines,[16] levees and lobes;[17] on images taken from space they have dark colours.[14] Some parts of the volcano underwent hydrothermal alteration,[18] producing gray-white rocks[19] and clay,[20] and wind-blown ash covers part of the lava flows.[17]

Casiri is part of the Cordillera del Barroso mountain range;[21] generally, the terrain around Casiri is dominated by various volcanic and fluvioglacial formations along with some moraines.[5][18] The mountain chains Barroso and Huancune lie southwest and south from Casiri, respectively,[18] and the neighbouring mountains Auquitapie and Iñuma are covered with snow.[22] Geologically, Casiri is considered to be part of the so-called "Paucarani Volcanics".[23]

Hydrology and Paucarani reservoir

The Rio Uchusuma, a tributary of the Rio Mauri, originates on Casiri.[21] A natural lake called Paucarani or Paucarini is on the southeastern foot of Casiri,[18][22] and is an important bird site.[24] The Quebrada Achuco valley[9] is located south of Casiri,[18] accompanied by wetlands.[25][18] On the other side, the southeastward-flowing Quebrada Mamuta lies to the north and northeast of the volcano, and to the northwest lie streams which flow through the lake Casiri and the lake Liñuma into the Rio Mauri.[5] Volcanic activity has influenced the drainages through the formation of lava dams, altering watersheds.[23]

An earth dam[22] on the Rio Uchusuma[26] was built in 1982-1986[27] and forms a reservoir also called Paucarani[25] on the southeastern foot of the volcano just southwest from the natural lake Paucarani.[18] This reservoir, which is run by the Junta de Usuarios del Valle de Tacna,[28] has a capacity of 10,500,000 cubic metres (370,000,000 cu ft) of water[29] and is a key[27] part of the water supply of Tacna;[30] water is transferred from the Paucarani reservoir through the Canal Uchusuma to Tacna,[31] covering 90% of Tacna's water consumption for both irrigation and human use.[32]

The Paucarani reservoir is also involved in the regulation of the Rio Caplina.[33] In 2012, a broken floodgate caused a damaging flood.[34] Alterations in the reservoir that increased its storage volume[27] may be responsible for water leaks in the dam;[35] additional problems reported at Paucarani are contamination with heavy metals - especially arsenic.[36]

Human geography

Casiri is located in the Tarata Province[22] of the Tacna Region of Peru;[21] it lies about 100 kilometres (62 mi) northeast from the city of Tacna and close to the border with Chile and Bolivia.[15] The volcano is situated north of the town of Paucarani;[9] other human structures in the area south of Casiri are Calachata and Tulipiña. There are also numerous roads in the area,[18] including one which runs south of the volcano and reaches the Capaja camp to its west.[5] The town of Paucarani can be reached from the highway that connects Tacna with Charaña in Bolivia and Villa Industrial in Chile, through a secondary road.[37] The region is thinly populated.[38] A rain gauge of the Servicio Nacional de Meteorología e Hidrología del Perú was in use on the volcano at 4,600 metres (15,100 ft) elevation from 1946 to 2003.[39]

The volcano is considered a potential tourist attraction[40] owing to its scenery.[41] It is also part of the Monumento Natural de Paucarani geopark[22] and has been proposed to become a protected area.[41] The Paucarani reservoir also could be exploited for tourism purposes as well.[22]

Geology

The Nazca Plate subducts beneath the South America Plate at a rate of 7–9 centimetres per year (2.8–3.5 in/year)[42] and causes volcanism along the western margin of South America. This volcanism is distributed over three volcanic belts, the Northern Volcanic Zone, the Central Volcanic Zone and the Southern Volcanic Zone. The Central Volcanic Zone includes the volcanoes of southern Peru,[43] a country with over 300 volcanoes. Of these, El Misti, Huaynaputina, Sabancaya, Ticsani, Tutupaca, Ubinas and Yucamane have been active during historical time. There are also geothermal manifestations such as fumaroles, geysers and hot springs in the country.[44] Despite the activity, volcanism in Peru is poorly known.[43]

Composition

Based on rock types that the Casiri volcano has erupted, it can be determined that it is composed of andesite, basaltic andesite and trachyandesite with a porphyric texture; the rocks contain biotite, hornblende, plagioclase and sanidine crystals.[9][23] Deposition of sulfur from gases has formed sulfur deposits.[45]

Eruption history

The Quaternary-age[46] Casiri is one of the youngest volcanic systems in southern Peru[9] with postglacial activity,[47] and Peru's southernmost Holocene volcano.[48] Holocene lavas sourced from fissure vents[49] overlie Pleistocene-age moraines and are uneroded;[50] radiometric dating on the volcano has yielded ages of 50,000 years[51] and surface exposure dating has found ages of 6,000 ± 900 and 2,600 ± 400 years for two dark lava flows southwest and south of Casiri's main summit, respectively.[52]

There are no reported eruptions,[1] but activity may[53] or may not have occurred in historical time;[14] there are hot springs and solfataras[22] that are probably powered by Casiri's magmatic system.[54] Casiri has been classified as a latent[55] or potentially active volcano[56] with a moderate threat level.[57] Earthquakes in 2020 and 2021 in the area do not appear to relate to volcanic activity.[58]

In 2012, the Geophysical Institute in Peru announced that it would begin monitoring Casiri, along with two other volcanoes in southern Peru, with seismometers.[59] They consider it a "low hazard" volcano.[60] As of 2021, there are two seismometers and one instrument measuring the deformation of the volcano at Casiri.[61] The installation of a network to detect deformation of the volcano is supposed to begin in 2022.[62]

Human use

The Casiri volcanic complex and surrounding mountains have been prospected for potential geosites.[63]

Mining

The Gloria sulfur mine lies on Casiri[45] – specifically, on the foot of Paucarani[64] and southeast from the lava flows.[1] The sulfur is contained in heavily altered rocks covering an area of about 1 square kilometre (0.39 sq mi) and is genetically related to the activity of Casiri. It has been excavated through trenches and wells;[65] some installations could still be exploitable.[22] Another mine known as San Luis may also be associated with Paucarani;[65] it is located on the northwestern flank.[48][5] Precious metals might occur in the hydrothermally altered areas at Casiri.[66]

Geothermal power

The area of Casiri features the Chungará-Kallapuma geothermal field, where about 50 separate vents occur along the path of the Quebrada Chungará and the Kallapuma River; they reach temperatures of 83.4 °C (182.1 °F). These phenomena appear to relate to the activity of neighbouring volcanoes, which supply the heat to the geothermal field,[67] while rainfall supplies the water and faults the paths for the ascending water; the hot springs are currently used as spas by the local population.[68]

The geothermal power potential of the Tacna Region has been researched, partly because the Tacna Region covers its electricity demand with either nonrenewable oil or with hydropower (which is subject to climate variations). Mining is both an important economic resource in Tacna and a major consumer of electricity.[69] In the case of the Chungará-Kallapuma geothermal field, the capacity of a 75 megawatt power plant exists;[70] however, despite ongoing research since 1974 and a high geothermal potential, no geothermal power production has taken place in Peru as of 2013.[44]

References

  1. 1 2 3 4 5 6 7 Vela et al. 2016, p. 19.
  2. ↑ Juan Carlos Mamani Morales, Cuentos de Parinacota, 2009, p. 48: Casiri: del aymara q'asiri, gritador/a
  3. ↑ INGEMMET 2000, p. 47.
  4. ↑ INGEMMET 2000, p. 62.
  5. 1 2 3 4 5 Mendívil Echevarría 1965, Map2.
  6. ↑ Mendívil Echevarría 1965, p. 12.
  7. ↑ "PLAN DESARROLLO URBANO DE LA CIUDAD DE TACNA 2014 –2023" (PDF). Municipalidad Provincial de Tacna (in Spanish). May 2014. p. 118. Retrieved 1 November 2019.
  8. ↑ Cruz Pauccara, Flores Jacobo & Velarde Benavente 2020, p. 15.
  9. 1 2 3 4 5 Cervantes G. & Monge Miguel 2000, p. 7.
  10. ↑ Calderón et al. 2023, p. 373.
  11. 1 2 3 4 Bromley et al. 2019, p. 4.
  12. 1 2 3 4 Calderón et al. 2023, p. 374.
  13. 1 2 de Silva & Francis 1990, p. 296.
  14. 1 2 3 de Silva & Francis 1990, p. 297.
  15. 1 2 3 de Silva & Francis 1990, p. 288.
  16. 1 2 3 Mendívil Echevarría 1965, pp. 64–65.
  17. 1 2 Bromley et al. 2019, p. 11.
  18. 1 2 3 4 5 6 7 8 Cervantes G. & Monge Miguel 2000, Memoria Mapa Palca 36x-4.
  19. ↑ Mendívil Echevarría 1965, p. 57.
  20. ↑ Zavala Carrión & Steinmüller 1997, p. 66.
  21. 1 2 3 Galloso Carrasco, Armando; Loaiza Choque, Edwin (2009). "Actividad minera artesanal en las zonas de Apurímac, Cusco, Tacna y Moquegua - [Boletín E 7]". Instituto Geológico, Minero y Metalúrgico - INGEMMET: 74.
  22. 1 2 3 4 5 6 7 8 INGEMMET 2000, p. 277.
  23. 1 2 3 Mendívil Echevarría 1965, p. 64.
  24. ↑ León, Juan Franco; Delgado, Victorino; Sulca, Liduvina (1997). "ESTUDIO CUALITATIVO DEL FITOPLANCTON DE LA LAGUNA ALTOANDINA PAUCARANI-TACNA". Ciencia & Desarrollo (in Spanish) (5): 107. doi:10.33326/26176033.1997.5.101. ISSN 2617-6033.
  25. 1 2 Cervantes G. & Monge Miguel 2000, p. 8.
  26. ↑ Yepes del Castillo, Ernesto; Novak Talavera, Fabián; Gamarra Elías, Carlos; Brousset Barrios, Jorge (2018). "Intereses del Perú en la Región Sur". Pontificia Universidad Católica del Perú: 31. ISBN 9789972671548.
  27. 1 2 3 "Represa de Paucarani se encuentra en peligro". Diario Correo. 24 February 2019. Retrieved 29 May 2019.
  28. ↑ Limache Sandoval, Elmer; Choque Apaza, Vidal; Piaggo Canivillo, Miguel Alexis; Limache Sandoval, Elmer; Choque Apaza, Vidal; Piaggo Canivillo, Miguel Alexis (August 2021). "Propuesta de programa para la optimización de los recursos hídricos en zonas áridas de Tacna, Perú". Revista Universidad y Sociedad. 13 (4): 521–535. ISSN 2218-3620.
  29. ↑ "Represa de Paucarani tiene 46% de agua almacenada". Diario Correo. 16 April 2015. Retrieved 29 May 2019.
  30. ↑ INGEMMET 2000, p. 271.
  31. ↑ Sánchez Velásquez 1996, p. 63.
  32. ↑ Nieto, Luz Elena Vega (24 December 2014). "Racionarán agua en Tacna por anuncio de sequía". La República. Retrieved 29 May 2019.
  33. ↑ Acosta Pereira, Cotrina Chávez & Peña Laureano 2009, p. 11.
  34. ↑ "Crecida de río arrasa puentes y bocatomas en la sierra de Tacna". Diario Correo (in Spanish). 17 January 2017. Retrieved 29 May 2019.
  35. ↑ Sánchez Velásquez 1996, p. 62.
  36. ↑ Rivas, Jorge Turpo (7 August 2012). "Tacna: Advierten aumento de arsénico en agua". La República. Retrieved 29 May 2019.
  37. ↑ Mendívil Echevarría 1965, p. 5.
  38. ↑ Cruz Pauccara, Flores Jacobo & Velarde Benavente 2020, p. 11.
  39. ↑ Acosta Pereira, Cotrina Chávez & Peña Laureano 2009, p. 29.
  40. ↑ INGEMMET 2000, p. 272.
  41. 1 2 INGEMMET 2000, p. 283.
  42. ↑ Bromley et al. 2019, p. 2.
  43. 1 2 de Silva & Francis 1990, p. 287.
  44. 1 2 Cacya Dueñas, Vargas Rodríguez & Cruz Pauccara 2013, p. 8.
  45. 1 2 Cervantes G. & Monge Miguel 2000, p. 10.
  46. ↑ Núñez Juárez, Morche & Fídel Smoll 1997, p. 12.
  47. ↑ Mendívil Echevarría 1965, p. 28.
  48. 1 2 "Nevados Casiri". Global Volcanism Program. Smithsonian Institution.
  49. ↑ INGEMMET 2000, p. 4.
  50. ↑ Mendívil Echevarría 1965, p. 2.
  51. ↑ INGEMMET 2000, p. 270.
  52. ↑ Bromley et al. 2019, p. 7.
  53. ↑ Mendívil Echevarría 1965, p. 65.
  54. ↑ Antayhua Vera et al. 2021, p. 9.
  55. ↑ INGEMMET 2000, p. 182.
  56. ↑ Núñez Juárez, Morche & Fídel Smoll 1997, p. 34.
  57. ↑ Vela et al. 2016, p. 29.
  58. ↑ Antayhua Vera et al. 2021, p. 3.
  59. ↑ Rivas, Jorge Turpo (10 August 2012). "Con modernos equipos le tomarán el pulso en tiempo real a tres volcanes de Tacna". La República. Retrieved 29 May 2019.
  60. ↑ Del Carpio Calienes et al. 2022, p. 67.
  61. ↑ Puma, Roger Machacca; Calienes, José Alberto Del Carpio; Porras, Marco Antonio Rivera; Huarache, Hernando Jhonny Tavera; Franco, Luisa Diomira Macedo; Calle, Jorge Andrés Concha; Zerpa, Ivonne Alejandra Lazarte; Quico, Riky Gustavo Centeno; Sacsi, Nino Celestino Puma; Aguilar, José Luis Torres; Alva, Katherine Andrea Vargas; Igme, John Edward Cruz; Quispe, Lizbeth Velarde; Nina, Javier Vilca; Garay, Alan Reinhold Malpartida (1 November 2021). "Monitoring of active volcanoes in Peru by the Instituto Geofísico del Perú: Early warning systems, communication, and information dissemination". Volcanica. 4 (S1): 52. doi:10.30909/vol.04.S1.4971. hdl:20.500.12816/5024. ISSN 2610-3540. S2CID 240447272.
  62. ↑ Del Carpio Calienes et al. 2022, p. 64.
  63. ↑ Calderón et al. 2023, p. 376.
  64. ↑ Mendívil Echevarría 1965, p. 62.
  65. 1 2 Mendívil Echevarría 1965, p. 79.
  66. ↑ Zavala Carrión & Steinmüller 1997, p. 7.
  67. ↑ Cacya Dueñas, Vargas Rodríguez & Cruz Pauccara 2013, p. 55.
  68. ↑ Cacya Dueñas, Vargas Rodríguez & Cruz Pauccara 2013, p. 69.
  69. ↑ Cacya Dueñas, Vargas Rodríguez & Cruz Pauccara 2013, p. 3.
  70. ↑ Cacya Dueñas, Vargas Rodríguez & Cruz Pauccara 2013, p. 112.

Sources

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