AMS 14C ages determination of the late Holocene Pilas, Mula and Cabeza de Vaca monogenetic volcanoes, Nicaragua
Por:
Avellán D.-R., Gomez-Vasconcelos, Martha Gabriela, Macias, Jose Luis, Velasquez, Gema
Publicada:
1 mar 2023
Ahead of Print:
1 ene 2023
Resumen:
Here we present six new 14C ages using the accelerator mass spectrometry
(AMS) technique for five samples of paleosol and one charcoal collected
from the central part of the Maribios volcanic mountain range, located
in the northwestern part of Nicaragua. This region is part of the
Nicaraguan active volcanic arc characterized by the occurrence of a
historic eruption that gave rise to the ``birth'' of the Cerro Negro
volcano in 1850 CE. The young relief and the new 14C ages obtained in
this work reveal that three other Holocene eruptions had recently
occurred before the growth of the Cerro Negro volcano in this region.
These volcanic events were independently established from an emission
vent with simultaneous Strombolian explosions to dominantly effusive
eruptions, forming extensive lava flows and associated scoria cones of
the Cabeza de Vaca, Mula, and Pilas monogenetic volcanoes. AMS
radiocarbon dating from charcoal and paleosols underlying these deposits
yielded maximum ages of 1050 +/- 30 years BP for Cabeza de Vaca volcano,
860 +/- 30 yrs BP for Mula volcano, and 520 +/- 15 yrs BP for Pilas
volcano. These results of AMS 14C analyses provide reliable age ranges
of 990-1025 cal yr AD for Cabeza de Vaca volcano, 1166-1220 cal yrs AD
for Mula volcano, and 1410-1424 cal yrs AD for Pilas volcano.
Filiaciones:
Avellán D.-R.:
CONACyT- Instituto de Geofísica, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro 8701, Michoacán, Morelia, 58190, Mexico
Instituto de Geofísica, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro 8701, Michoacán, Morelia, 58190, Mexico
Gomez-Vasconcelos, Martha Gabriela:
CONACyT- Instituto de Investigaciones en Ciencias de la Tierra, Universidad Michoacana de San Nicolás de Hidalgo, Michoacán, Morelia, Mexico
Macias, Jose Luis:
Instituto de Geofísica, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro 8701, Michoacán, Morelia, 58190, Mexico
Velasquez, Gema:
Universidad Nacional Autónoma de México, Posgrado en Geografía, Coyoacán, Ciudad de México, 04510, Mexico
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