Jemez Lineament

The Jemez Lineament is a chain of late Cenozoic volcanic fields, 600 km long, reaching from the Springerville and White Mountains volcanic fields in East-Central Arizona to the Raton-Clayton volcanic field in Northeastern New Mexico. It was long interpreted as a hot spot trace (Raton hot spot)[1] due to its resemblance in length and azimuth to the Yellowstone hot spot trace, but there is no systematic progression in age along the trace[2] and it is now interpreted as a hydrous subduction zone scar, separating basement rock of the Yavapai-Mazatzal transition zone from the Mazaztl Province proper.[3][4]

Precambrian provinces of western North America. The Jemez Lineament is coincident with the Yavapai-Mazatzal boundary.

Volcano fields

The Jemez Lineament consists of the San Carlos volcanic field, Springerville volcanic field, Red Hill volcanic field,[1] Zuni-Bandera volcanic field, Mount Taylor volcanic field, Jemez volcanic field and possibly the Ocate volcanic field, Raton-Clayton volcanic field, and Mesa de Maya. These are all young (Cenozoic) volcanic fields, showing some progression in age from southeast to northwest (across the Lineament) but no systematic progression in age along the Lineament.[5]

The Lineament is interpreted as a hydrous subduction zone scar marking the southern boundary of the pre-1.70 GYa Yavapai basement. Seismic imaging shows both north- and south-dipping reflections that converge at the core-mantle boundary. There is also a Pb-isotopic boundary coincident with the Lineament. It is a zone of persistent crustal weakness.[6]

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References
  1. Wood, Charles Arthur; Kienle, Jürgen (1992). Volcanoes of North America: United States and Canada. Cambridge University Press. pp. 284–286. ISBN 978-0-521-43811-7.
  2. Dunbar, Nelia W. (2005). "Quaternary Volcanism in New Mexico" (PDF). New Mexico Museum of Natural History and Science Bulletin. 28: 95–106. Retrieved 1 March 2020.
  3. Aldrich Jr., M. J. (1986). "Tectonics of the Jemez Lineament in the Jemez Mountains and Rio Grande Rift". Journal of Geophysical Research. 91 (B2): 1753–1762. Bibcode:1986JGR....91.1753A. doi:10.1029/JB091iB02p01753.
  4. Whitmeyer, Steven; Karlstrom, Karl E. (2007). "Tectonic model for the Proterozoic growth of North America". Geosphere. 3 (4): 220. doi:10.1130/GES00055.1. Retrieved 18 April 2020.
  5. Channer, Micheal A.; Ricketts, Jason W.; Zimmerer, Matthew; Heizler, Matthew; Karlstrom, Karl E. (1 October 2015). "Surface uplift above the Jemez mantle anomaly in the past 4 Ma based on 40Ar/39Ar dated paleoprofiles of the Rio San Jose, New Mexico, USA". Geosphere. 11 (5): 1384–1400.
  6. Karlstrom, Karl E.; Amato, Jeffrey M.; Williams, Michael L.; Heizler, Matt; Shaw, Colin A.; Read, Adam S.; Bauer, Paul (2004). The Geology of New Mexico: A Geologic History. New Mexico Geological Society. p. 15.

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