Geology of the late Pliocene - Pleistocene Acoculco caldera complex, eastern Trans-Mexican Volcanic Belt (Mexico)
Por:
Ramon Avellan, Denis, Luis Macias, Jose, Layer, Paul W., Cisneros, Guillermo, Manuel Sanchez-Nunez, Juan, Gabriela Gomez-Vasconcelos, Martha, Pola, Antonio, Sosa-Ceballos, Giovanni, Garcia-Tenorio, Felipe, Reyes Agustin, Gabriela, Osorio-Ocampo, Susana, Garcia-Sanchez, Laura, Fabiola Mendiola, Irma, Marti, Joan, Lopez-Loera, Hector, Benowitz, Jeff
Publicada:
3 jul 2019
Resumen:
We present a new 1:80,000-scale geologic map of the Acoculco caldera
(Ac) located between the states of Puebla and Hidalgo in eastern Mexico.
The map, encompassing an area of 856 km(2), is grounded on an ArcMap
data set and is supported by nine new Ar-40/Ar-39 dates. The caldera
lies upon Cretaceous limestones and Miocene to Pliocene volcanic rocks
(13-3 Ma). The caldera consists of 31 lithostatrigraphic units formed
between 2.7 and 0.06 Ma that include a wide variety of volcanic
landforms (cinder cones, lava domes). The caldera has a semi-circular
shape (18-16 km) bounded by the Atotonilco scarp to the north, the NW-SE
Manzanito fault to the west, and scattered vents to the east and
southern parts. The distribution of the Acoculco ignimbrite, the lithic
breccia, and lacustrine sediments define the caldera ring fault. Late
Pleistocene activity and pervasive hydrothermal alteration suggest a
high geothermal potential in the area.
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Geofis, Catedras CONACYT, Antigua Carretera Patzcuaro 8701, Morelia 58190, Michoacan, Mexico
Univ Nacl Autonoma Mexico, Inst Geofis, Morelia, Michoacan, Mexico
Univ Alaska Fairbanks, Coll Nat Sci & Math, Fairbanks, AK USA
Inst Politecn Nacl CIIEMAD, Mexico City, DF, Mexico
Univ Nacl Autonoma Mexico, Escuela Nacl Estudios Super, Morelia, Michoacan, Mexico
Univ Nacl Autonoma Mexico, Inst Geofis, Posgrad Ciencias Tierra, Morelia, Michoacan, Mexico
CSIC, Inst Ciencias Tierra Jaume Almera, Barcelona, Spain
Inst Potosino Invest Cient & Tecnol AC, Div Geociencias Aplicadas, San Luis Potosi, Mexico
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