Compositional and volumetric development of a monogenetic lava flow field: The historical case of Paricutin (Michoacan, Mexico)
Por:
Larrea, Patricia, Salinas, Sergio, Widom, Elisabeth, Siebe, Claus, Abbitt, Robbyn J. F.
Publicada:
15 dic 2017
Resumen:
Paricutin volcano is the youngest and most studied monogenetic volcano
in the Michoacan-Guanajuato volcanic field (Mexico), with an excellent
historical record of its nine years (February 1943 to March 1952) of
eruptive activity. This eruption offered a unique opportunity to observe
the birth of a new volcano and document its entire eruption. Geologists
surveyed all of the eruptive phases in progress, providing maps
depicting the volcano's sequential growth. We have combined all of those
previous results and present a new methodological approach, which
utilizes state of the art GIS mapping tools to outline and identify the
23 different eruptive phases as originally defined by Luhr and Simkin
(1993). Using these detailed lava flow distribution maps, the volume of
each of the flows was estimated with the aid of pre- and post-eruption
digital elevation models. Our procedure yielded a total lava flow volume
ranging between 1.59 and 1.68 km(3) DRE, which is larger than previous
estimates based on simpler methods. In addition, compositional data
allowed us to estimate magma effusion rates and to determine variations
in the relative proportions of the different magma compositions issued
during the eruption. These results represent the first comprehensive
documentation of the combined chemical, temporal, and volumetric
evolution of the Paricutin lava field and provide key constraints for
petrological interpretations of the nature of the magmatic plumbing
system that fed the eruption. (C) 2017 Elsevier B.V. All rights
reserved.
Filiaciones:
Larrea, Patricia:
Miami Univ, Dept Geol & Environm Earth Sci, Oxford, OH 45056 USA
Yachay Tech, Sch Geol Sci & Engn, Urcuqui, Imbabura, Ecuador
Salinas, Sergio:
Univ Nacl Autonoma Mexico, Div Ingn Ciencias Tierra, Fac Ingn, Ciudad Univ, Coyoacan 04510, Ciudad De Mexic, Mexico
Widom, Elisabeth:
Miami Univ, Dept Geol & Environm Earth Sci, Oxford, OH 45056 USA
Siebe, Claus:
Univ Nacl Autonoma Mexico, Inst Geofis, Dept Vulcanol, Ciudad Univ, Mexico City 04510, DF, Mexico
Abbitt, Robbyn J. F.:
Miami Univ, Dept Geog, Oxford, OH 45056 USA
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