Reyes-Guzman N., Siebe C., Chevrel Magdalena Oryaelle, Pereira G., Mahgoub A. N., Bohnel H. (2023). Holocene volcanic eruptions of the Malpais de Zacapu and its pre-Hispanic settlement history. Ancient Mesoamerica, [Early access], PII S095653612100050X [16 p.]. ISSN 0956-5361.
Titre du document
Holocene volcanic eruptions of the Malpais de Zacapu and its pre-Hispanic settlement history
The Michoacan-Guanajuato volcanic field (MGVF) hosts >1,400 monogenetic structures younger than 5 Ma. Here we focus on the Malpais de Zacapu Late Holocene cluster located in the western part of the Zacapu lacustrine basin, situated in the heart of native Purepecha province. The Malpais de Zacapu comprises four distinct eruptions: the Infiernillo lava flow emitted at similar to 1450 b.c.; Malpais Las Viboras, a purely effusive eruption at similar to 1000 b.c.; the Capaxtiro compound lava flow at similar to 150 b.c.; and the most recent eruption, the Malpais Prieto lava flow at similar to a.d. 900. Although these lava flows are not inhabited today, they were densely populated in pre-Hispanic times (before a.d. 1521), especially during the Milpillas phase (a.d. 1200-1450). Volcanological studies (geochemical studies and detailed mapping using high-resolution DEM from LiDAR) allowed us to characterize these eruptions in terms of their magma source (rock chemical composition, mineral assemblage), age (radiocarbon and paleomagnetic dating), magnitude and dynamics (volume, morphology of the deposits), as well as lava flow emplacement duration. The findings allow us to infer the potential impact that these eruptions had on the pre-Hispanic settlement history of the area.
Plan de classement
Géologie et formations superficielles [064]
;
Géophysique interne [066]
;
Sociétés, développement culturel [112]
