Jaraguay volcanic field is part of a chain of volcanic fields that formed on the Baja California peninsula after subduction of the Pacific plate beneath it ceased. Starting from the north they are San Quintín, Jaraguay, San Borja, Santa Clara, San Ignacio–San José de Gracia, Santa Rosalía and La Purísima (volcano) volcanic fields.[2]
The field consists of cinder cones and lava flows.[1] The lavas cover a surface area of 2,200 square kilometres (850 sq mi) and tend to have thicknesses 5–35 metres (16–115 ft). Many of these were erupted from fissures with no clear vents.[3] Cinder cones have average heights of 720 metres (2,360 ft) above basis. There is some geographical differentiation with the largest cones found on the western side and the cones concentrated on the easternmost edge.[4] A flat lava plateau also makes up the field. Approximately 214 vents were counted in 2013. Many of these vents are elongated in north-south direction, with a slight NNW-SSE slant.[5]
Rocks erupted in the field range from magnesium-rich[5]basalt to basaltic andesite,[1] and define a calc-alkaline suite.[6] These magnesium rich lavas have been named "bajaites".[7]Late Mioceneadakites are also found in Jaraguay.[2] These melts probably form from dehydration melting of the mantle modified by the previous subduction of the Farallon plate;[3] another older theory attributed their formation to the attempted subduction of a spreading ridge.[8] The basement of the field is formed by Mesozoic sedimentary sequences with Cretaceous intrusions and Tertiary volcanic rocks.[3]
Activity may be of Holocene age; some flows appear to be more recent than lava flows from San Quintín Volcanic Field which overlie 5,000-6,000-year-old deposits.[1] Other than that, potassium-argon dating indicates effusive activity between 20 and 14 million years ago with a peak between 12.2 and 3.9 million years ago.[5]
^ abNegrete-Aranda, Raquel; Cañón-Tapia, Edgardo (April 2008). "Post-subduction volcanism in the Baja California Peninsula, Mexico: The effects of tectonic reconfiguration in volcanic systems". Lithos. 102 (1–2): 392–414. doi:10.1016/j.lithos.2007.08.013.
^ abcPallares, Carlos; Bellon, Hervé; Benoit, Mathieu; Maury, René C.; Aguillón-Robles, Alfredo; Calmus, Thierry; Cotten, Joseph (September 2008). "Temporal geochemical evolution of Neogene volcanism in northern Baja California (27°–30° N): Insights on the origin of post-subduction magnesian andesites". Lithos. 105 (1–2): 162–180. doi:10.1016/j.lithos.2008.03.004.
^Negrete-Aranda, R.; Canon-Tapia, E. "Morphological Study of Jaraguay and San Borja Volcanic Fields, Baja California, Mexico". The SAO/NASA Astrophysics Data System. American Geophysical Union, Fall Meeting 2005. Bibcode:2005AGUFM.V21D0641N.
^ abcGerma, Aurélie; Connor, Laura J.; Cañon-Tapia, Edgardo; Le Corvec, Nicolas (21 November 2013). "Tectonic and magmatic controls on the location of post-subduction monogenetic volcanoes in Baja California, Mexico, revealed through spatial analysis of eruptive vents". Bulletin of Volcanology. 75 (12). doi:10.1007/s00445-013-0782-6.
^Torrescano- Valle, Nuria; Islebe, Gerald A.; Roy, Priyadarsi D., eds. (2019). The Holocene and Anthropocene Environmental History of Mexico: A Paleoecological Approach on Mesoamerica. Cham: Springer International Publishing. doi:10.1007/978-3-030-31719-5. ISBN978-3-030-31718-8.
^Bellon, Hervé; Aguillón-Robles, Alfredo; Calmus, Thierry; Maury, René C.; Bourgois, Jacques; Cotten, Joseph (April 2006). "La Purísima volcanic field, Baja California Sur (Mexico): Miocene to Quaternary volcanism related to subduction and opening of an asthenospheric window". Journal of Volcanology and Geothermal Research. 152 (3–4): 253–272. doi:10.1016/j.jvolgeores.2005.10.005.
^Scott E. Johnson (2003). Tectonic Evolution of Northwestern México and the Southwestern USA. Geological Society of America. p. 34. ISBN978-0-8137-2374-7.
January 01, 1970
jaraguay, volcanic, field, volcanic, field, northern, baja, california, mexico, part, chain, volcanic, fields, that, formed, baja, california, peninsula, after, subduction, pacific, plate, beneath, ceased, starting, from, north, they, quintín, jaraguay, borja,. 29 20 N 114 30 W 29 33 N 114 5 W 29 33 114 5 1 Jaraguay volcanic field is a volcanic field in northern Baja California Mexico 1 Jaraguay volcanic field is part of a chain of volcanic fields that formed on the Baja California peninsula after subduction of the Pacific plate beneath it ceased Starting from the north they are San Quintin Jaraguay San Borja Santa Clara San Ignacio San Jose de Gracia Santa Rosalia and La Purisima volcano volcanic fields 2 The field consists of cinder cones and lava flows 1 The lavas cover a surface area of 2 200 square kilometres 850 sq mi and tend to have thicknesses 5 35 metres 16 115 ft Many of these were erupted from fissures with no clear vents 3 Cinder cones have average heights of 720 metres 2 360 ft above basis There is some geographical differentiation with the largest cones found on the western side and the cones concentrated on the easternmost edge 4 A flat lava plateau also makes up the field Approximately 214 vents were counted in 2013 Many of these vents are elongated in north south direction with a slight NNW SSE slant 5 Rocks erupted in the field range from magnesium rich 5 basalt to basaltic andesite 1 and define a calc alkaline suite 6 These magnesium rich lavas have been named bajaites 7 Late Miocene adakites are also found in Jaraguay 2 These melts probably form from dehydration melting of the mantle modified by the previous subduction of the Farallon plate 3 another older theory attributed their formation to the attempted subduction of a spreading ridge 8 The basement of the field is formed by Mesozoic sedimentary sequences with Cretaceous intrusions and Tertiary volcanic rocks 3 Activity may be of Holocene age some flows appear to be more recent than lava flows from San Quintin Volcanic Field which overlie 5 000 6 000 year old deposits 1 Other than that potassium argon dating indicates effusive activity between 20 and 14 million years ago with a peak between 12 2 and 3 9 million years ago 5 References edit a b c d e Jaraguay Volcanic Field Global Volcanism Program Smithsonian Institution a b Negrete Aranda Raquel Canon Tapia Edgardo April 2008 Post subduction volcanism in the Baja California Peninsula Mexico The effects of tectonic reconfiguration in volcanic systems Lithos 102 1 2 392 414 doi 10 1016 j lithos 2007 08 013 a b c Pallares Carlos Bellon Herve Benoit Mathieu Maury Rene C Aguillon Robles Alfredo Calmus Thierry Cotten Joseph September 2008 Temporal geochemical evolution of Neogene volcanism in northern Baja California 27 30 N Insights on the origin of post subduction magnesian andesites Lithos 105 1 2 162 180 doi 10 1016 j lithos 2008 03 004 Negrete Aranda R Canon Tapia E Morphological Study of Jaraguay and San Borja Volcanic Fields Baja California Mexico The SAO NASA Astrophysics Data System American Geophysical Union Fall Meeting 2005 Bibcode 2005AGUFM V21D0641N a b c Germa Aurelie Connor Laura J Canon Tapia Edgardo Le Corvec Nicolas 21 November 2013 Tectonic and magmatic controls on the location of post subduction monogenetic volcanoes in Baja California Mexico revealed through spatial analysis of eruptive vents Bulletin of Volcanology 75 12 doi 10 1007 s00445 013 0782 6 Torrescano Valle Nuria Islebe Gerald A Roy Priyadarsi D eds 2019 The Holocene and Anthropocene Environmental History of Mexico A Paleoecological Approach on Mesoamerica Cham Springer International Publishing doi 10 1007 978 3 030 31719 5 ISBN 978 3 030 31718 8 Bellon Herve Aguillon Robles Alfredo Calmus Thierry Maury Rene C Bourgois Jacques Cotten Joseph April 2006 La Purisima volcanic field Baja California Sur Mexico Miocene to Quaternary volcanism related to subduction and opening of an asthenospheric window Journal of Volcanology and Geothermal Research 152 3 4 253 272 doi 10 1016 j jvolgeores 2005 10 005 Scott E Johnson 2003 Tectonic Evolution of Northwestern Mexico and the Southwestern USA Geological Society of America p 34 ISBN 978 0 8137 2374 7 Retrieved from https en wikipedia org w index php title Jaraguay volcanic field amp oldid 1203138996, wikipedia, wiki, book, books, library,
