Reassessment of the eruptive chronology of El Metate shield volcano (central-western Mexico) based on a comprehensive rock-magnetic, paleomagnetic and multi-approach paleointensity survey

Nayeli Pérez-Rodríguez, Juan Morales, Marie Noëlle Guilbaud, Avto Goguitchaichvili, Rubén Cejudo-Ruiz, María del Sol Hernández-Bernal

Resultado de la investigación: Contribución a una revistaArtículo

Resumen

We study seven out of the thirteen lava flows associated to El Metate shield volcano using paleomagnetic, absolute intensity and rock-magnetic experiments. Characteristic paleomagnetic directions were successfully determined from most of the flows. A combined mean direction of D = 346.4° and I = 32.1° (N = 34, R = 33.73, k = 121.74, α95 = 2.2) was obtained for the early flows (Flow 1 − Flow 3). Flow 6a (a flow from the late emplacement stage) yielded a statistically distinguishable mean paleomagnetic direction of D = 359.2° and I = 29.6° (N = 9, R = 8.97, k = 294.6, α95 = 3.0). Furthermore, the significant between-flow variation of absolute paleointensity values obtained using two different methodologies, which resembles the trend followed by that of the global model SHA. DIF 14k intensity curve for the period 1000 AD 1600 AD, disagrees with previous hypothesis supporting a short emplacement period between 50 and 100 years for the whole sequence. Additionally, paleodirectional and paleointensity dating of the studied flows allowed to refine the eruptive chronology indicating that early flows were produced over a short time period, whereas at least two of the later flows were erupted 200 years later; the activity ending just prior to the arrival of the Spaniards in ∼1520. Under these circumstances, and in light of the presented high quality paleomagnetic and paleointensity data, the assumed monogenetic nature of El Metate volcano seems to be questionable.

Idioma originalInglés
Número de artículo101031
PublicaciónQuaternary Geochronology
Volumen55
DOI
EstadoPublicada - feb 2020

Huella dactilar

shield volcano
chronology
rock
emplacement
lava flow
volcano

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title = "Reassessment of the eruptive chronology of El Metate shield volcano (central-western Mexico) based on a comprehensive rock-magnetic, paleomagnetic and multi-approach paleointensity survey",
abstract = "We study seven out of the thirteen lava flows associated to El Metate shield volcano using paleomagnetic, absolute intensity and rock-magnetic experiments. Characteristic paleomagnetic directions were successfully determined from most of the flows. A combined mean direction of D = 346.4° and I = 32.1° (N = 34, R = 33.73, k = 121.74, α95 = 2.2) was obtained for the early flows (Flow 1 − Flow 3). Flow 6a (a flow from the late emplacement stage) yielded a statistically distinguishable mean paleomagnetic direction of D = 359.2° and I = 29.6° (N = 9, R = 8.97, k = 294.6, α95 = 3.0). Furthermore, the significant between-flow variation of absolute paleointensity values obtained using two different methodologies, which resembles the trend followed by that of the global model SHA. DIF 14k intensity curve for the period 1000 AD 1600 AD, disagrees with previous hypothesis supporting a short emplacement period between 50 and 100 years for the whole sequence. Additionally, paleodirectional and paleointensity dating of the studied flows allowed to refine the eruptive chronology indicating that early flows were produced over a short time period, whereas at least two of the later flows were erupted 200 years later; the activity ending just prior to the arrival of the Spaniards in ∼1520. Under these circumstances, and in light of the presented high quality paleomagnetic and paleointensity data, the assumed monogenetic nature of El Metate volcano seems to be questionable.",
keywords = "Holocene paleomagnetism, Mexican shield volcano, Michoac{\'a}n-Guanajuato Volcanic Field, Paleomagnetic dating",
author = "Nayeli P{\'e}rez-Rodr{\'i}guez and Juan Morales and Guilbaud, {Marie No{\"e}lle} and Avto Goguitchaichvili and Rub{\'e}n Cejudo-Ruiz and Hern{\'a}ndez-Bernal, {Mar{\'i}a del Sol}",
year = "2020",
month = "2",
doi = "10.1016/j.quageo.2019.101031",
language = "Ingl{\'e}s",
volume = "55",
journal = "Quaternary Geochronology",
issn = "1871-1014",
publisher = "Elsevier",

}

Reassessment of the eruptive chronology of El Metate shield volcano (central-western Mexico) based on a comprehensive rock-magnetic, paleomagnetic and multi-approach paleointensity survey. / Pérez-Rodríguez, Nayeli; Morales, Juan; Guilbaud, Marie Noëlle; Goguitchaichvili, Avto; Cejudo-Ruiz, Rubén; Hernández-Bernal, María del Sol.

En: Quaternary Geochronology, Vol. 55, 101031, 02.2020.

Resultado de la investigación: Contribución a una revistaArtículo

TY - JOUR

T1 - Reassessment of the eruptive chronology of El Metate shield volcano (central-western Mexico) based on a comprehensive rock-magnetic, paleomagnetic and multi-approach paleointensity survey

AU - Pérez-Rodríguez, Nayeli

AU - Morales, Juan

AU - Guilbaud, Marie Noëlle

AU - Goguitchaichvili, Avto

AU - Cejudo-Ruiz, Rubén

AU - Hernández-Bernal, María del Sol

PY - 2020/2

Y1 - 2020/2

N2 - We study seven out of the thirteen lava flows associated to El Metate shield volcano using paleomagnetic, absolute intensity and rock-magnetic experiments. Characteristic paleomagnetic directions were successfully determined from most of the flows. A combined mean direction of D = 346.4° and I = 32.1° (N = 34, R = 33.73, k = 121.74, α95 = 2.2) was obtained for the early flows (Flow 1 − Flow 3). Flow 6a (a flow from the late emplacement stage) yielded a statistically distinguishable mean paleomagnetic direction of D = 359.2° and I = 29.6° (N = 9, R = 8.97, k = 294.6, α95 = 3.0). Furthermore, the significant between-flow variation of absolute paleointensity values obtained using two different methodologies, which resembles the trend followed by that of the global model SHA. DIF 14k intensity curve for the period 1000 AD 1600 AD, disagrees with previous hypothesis supporting a short emplacement period between 50 and 100 years for the whole sequence. Additionally, paleodirectional and paleointensity dating of the studied flows allowed to refine the eruptive chronology indicating that early flows were produced over a short time period, whereas at least two of the later flows were erupted 200 years later; the activity ending just prior to the arrival of the Spaniards in ∼1520. Under these circumstances, and in light of the presented high quality paleomagnetic and paleointensity data, the assumed monogenetic nature of El Metate volcano seems to be questionable.

AB - We study seven out of the thirteen lava flows associated to El Metate shield volcano using paleomagnetic, absolute intensity and rock-magnetic experiments. Characteristic paleomagnetic directions were successfully determined from most of the flows. A combined mean direction of D = 346.4° and I = 32.1° (N = 34, R = 33.73, k = 121.74, α95 = 2.2) was obtained for the early flows (Flow 1 − Flow 3). Flow 6a (a flow from the late emplacement stage) yielded a statistically distinguishable mean paleomagnetic direction of D = 359.2° and I = 29.6° (N = 9, R = 8.97, k = 294.6, α95 = 3.0). Furthermore, the significant between-flow variation of absolute paleointensity values obtained using two different methodologies, which resembles the trend followed by that of the global model SHA. DIF 14k intensity curve for the period 1000 AD 1600 AD, disagrees with previous hypothesis supporting a short emplacement period between 50 and 100 years for the whole sequence. Additionally, paleodirectional and paleointensity dating of the studied flows allowed to refine the eruptive chronology indicating that early flows were produced over a short time period, whereas at least two of the later flows were erupted 200 years later; the activity ending just prior to the arrival of the Spaniards in ∼1520. Under these circumstances, and in light of the presented high quality paleomagnetic and paleointensity data, the assumed monogenetic nature of El Metate volcano seems to be questionable.

KW - Holocene paleomagnetism

KW - Mexican shield volcano

KW - Michoacán-Guanajuato Volcanic Field

KW - Paleomagnetic dating

UR - http://www.scopus.com/inward/record.url?scp=85072995451&partnerID=8YFLogxK

U2 - 10.1016/j.quageo.2019.101031

DO - 10.1016/j.quageo.2019.101031

M3 - Artículo

AN - SCOPUS:85072995451

VL - 55

JO - Quaternary Geochronology

JF - Quaternary Geochronology

SN - 1871-1014

M1 - 101031

ER -