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Eruptive chronology of monogenetic volcanoes northwestern of Morelia – Insights into volcano-tectonic interactions in the central-eastern Michoacán-Guanajuato Volcanic Field, México
Journal of South American Earth Sciences ( IF 1.7 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.jsames.2020.102554
Denis-Ramón Avellán , Guillermo Cisneros-Máximo , José Luis Macías , Martha Gabriela Gómez-Vasconcelos , Paul W. Layer , Giovanni Sosa-Ceballos , Jasinto Robles-Camacho

Abstract Twelve monogenetic volcanoes formed during the last 7 Ma within the Tarimbaro graben, northwest of the city of Morelia, in the central-eastern part of the Michoacan-Guanajuato volcanic field (Mexico). These include four scoria cones (Pelon, Tetillas, Jamanal, and Parastaco), four lava domes (La Cruz, Divisadero, Estadio, and Tetillas), two small shield volcanoes (Quinceo and Tetillas) and two lava flows (Cuto and Cerritos). Based on a detailed geological map and stratigraphy aided by new 40Ar/39Ar and 14C radiometric dates, and whole-rock chemical analyses, we established the eruptive chronology of these monogenetic volcanoes. These volcanoes were built upon four early Miocene successions of regional volcanism named Cuitzeo lavas (18.7 Ma), Cuitzeo ignimbrite (17.4 Ma), Atecuaro ignimbrite (16.8 Ma), and Punhuato lavas (16.3 Ma). Late Miocene to Pliocene activity consisted of the La Cruz, Divisadero, and Estadio domes and the Cuto lava flow (6.7–3.1 Ma). Pleistocene activity included the Cuitzeo fallout pyroclastic sequence (1.48 Ma), the Quinceo small shield volcano (1.36 Ma), the Pelon scoria cone (0.84 Ma), the Tetillas small shield volcano, two lava domes and a scoria cone (0.56–0.34 Ma), the Jamanal and Parastaco scoria cones and the Cerritos lava flow (0.11 Ma). Magma volumes from these volcanoes vary from

中文翻译:

莫雷利亚西北部单生火山的喷发年表——深入了解墨西哥米却肯-瓜纳华托火山区中东部的火山-构造相互作用

摘要 12 座单生火山在过去 7 Ma 形成于莫雷利亚市西北部的塔林巴罗地堑内,位于米却肯-瓜纳华托火山区(墨西哥)的中东部。其中包括四个火山渣锥(Pelon、Tetillas、Jamanal 和 Parastaco)、四个熔岩圆顶(La Cruz、Divisadero、Estadio 和 Tetillas)、两个小盾形火山(Quinceo 和 Tetillas)和两个熔岩流(Cuto 和 Cerritos)。基于详细的地质图和地层学,辅以新的 40Ar/39Ar 和 14C 辐射测量数据,以及全岩化学分析,我们确定了这些单生火山的喷发年表。这些火山建立在四个中新世早期的区域火山作用序列上,分别是 Cuitzeo 熔岩(18.7 Ma)、Cuitzeo ignimbrite(17.4 Ma)、Atecuaro ignimbrite(16.8 Ma)和 Punhuato 熔岩(16.3 Ma)。晚中新世至上新世活动包括 La Cruz、Divisadero 和 Estadio 穹顶以及 Cuto 熔岩流(6.7-3.1 Ma)。更新世活动包括 Cuitzeo 沉降火山碎屑序列 (1.48 Ma)、Quinceo 小盾状火山 (1.36 Ma)、Pelon 火山渣锥 (0.84 Ma)、Tetillas 小盾状火山、两个熔岩穹顶和一个火山渣锥 (0.56-0.34 Ma )、Jamanal 和 Parastaco 火山渣锥以及 Cerritos 熔岩流 (0.11 Ma)。这些火山的岩浆体积从 Jamanal 和 Parastaco 火山渣锥以及 Cerritos 熔岩流 (0.11 Ma)。这些火山的岩浆体积从 Jamanal 和 Parastaco 火山渣锥以及 Cerritos 熔岩流 (0.11 Ma)。这些火山的岩浆体积从
更新日期:2020-06-01
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