Volcaniclastic Deposit Analysis Using Grain Size, Digital and Stereological Techniques  

作　　者：Alberto Rangel-Durán Vanessa Verónica Espejel-García Alejandro Villalobos-Aragón Daphne Espejel-García Jorge Lucero-Álvarez Abraham Gilberto Mendez-Salas Alberto Rangel-Durán;Vanessa Verónica Espejel-García;Alejandro Villalobos-Aragón;Daphne Espejel-García;Jorge Lucero-Álvarez;Abraham Gilberto Mendez-Salas(Facultad de Ingeniería, Universidad Autónoma de Chihuahua, Chihuahua, México;Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahua, Chihuahua, México)

机构地区：[1]Facultad de Ingeniería, Universidad Autónoma de Chihuahua, Chihuahua, México [2]Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahua, Chihuahua, México

出　　处：《Open Journal of Civil Engineering》2023年第4期723-741,共19页土木工程期刊(英文)

摘　　要：This study undertook a comprehensive sedimentological and grain-size analysis of two previously uncharacterized volcanoclastic deposits exposed in the northwestern sector of Chihuahua City, Mexico. The primary objective was to propose a systematic genetic classification for these deposits, employing traditional sedimentological techniques and an advanced computerized granulometric analysis technique based on orthogonal images to discern their grain size distribution. Through these studies, evidence was sought to classify them genetically, presenting arguments to define them either as a lahar or a volcanic debris avalanche. Results were critically compared against existing literature data pertaining to lahars and debris avalanches, yielding moderate success. The analysis identified one of the deposits as a non-eruptive or post-eruptive lahar. This identification was substantiated by the delineation of distinct overbank and transition facies within the deposit, providing compelling evidence for its genetic classification.This study undertook a comprehensive sedimentological and grain-size analysis of two previously uncharacterized volcanoclastic deposits exposed in the northwestern sector of Chihuahua City, Mexico. The primary objective was to propose a systematic genetic classification for these deposits, employing traditional sedimentological techniques and an advanced computerized granulometric analysis technique based on orthogonal images to discern their grain size distribution. Through these studies, evidence was sought to classify them genetically, presenting arguments to define them either as a lahar or a volcanic debris avalanche. Results were critically compared against existing literature data pertaining to lahars and debris avalanches, yielding moderate success. The analysis identified one of the deposits as a non-eruptive or post-eruptive lahar. This identification was substantiated by the delineation of distinct overbank and transition facies within the deposit, providing compelling evidence for its genetic classification.

关 键 词：VOLCANICLASTIC LAHAR AVALANCHE STATISTICS CHIHUAHUA 

分 类 号：P61[天文地球—矿床学]