Rafael Torres-Orozco

Rafael Torres-Orozco
Universidad Veracruzana | UV · Centro de Ciencias de la Tierra

PhD, MSc, BSc Hons, in Earth Science

About

18
Publications
5,310
Reads
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94
Citations
Additional affiliations
November 2019 - October 2021
Universidad Nacional Autónoma de México
Position
  • PostDoc Position
Description
  • Physical Volcanology
June 2018 - July 2019
University College London
Position
  • PostDoc Position
Description
  • 4D imaging of volcanic processes
November 2017 - May 2018
The University of Manchester
Position
  • PostDoc Position
Description
  • 4D imaging of volcanic processes
Education
October 2012 - July 2017
Massey University
Field of study
August 2008 - January 2012
August 2004 - July 2008

Publications

Publications (18)
Article
Full-text available
The majority of basaltic magmas stall in the Earth’s crust as a result of the rheological evolution caused by crystallization during transport. However, the relationships between crystallinity, rheology and eruptibility remain uncertain because it is difficult to observe dynamic magma crystallization in real time. Here, we present in-situ 4D data f...
Article
Full-text available
Mt. Taranaki is an andesitic stratovolcano in the western North Island of New Zealand. Its magmas show slab-dehydration signatures and over the last 200 kyr they show gradually increasing incompatible element concentrations. Source basaltic melts from the upper mantle lithosphere pond at the base of the crust (∼25 km), interacting with other stalle...
Article
Full-text available
ABSTRACT Mt. Taranaki is an andesitic stratovolcano in the western North Island of New Zealand. Its magmas show slab-dehydration signatures and over the last 200 kyr they show gradually increasing incompatible element concentrations. Source basaltic melts from the upper mantle lithosphere pond at the base of the crust (∼25 km), interacting with oth...
Article
Mt. Tongariro is a multi-vent volcanic complex in the central North Island of New Zealand, constructed along the axis of an active graben. Its five largest-known explosive eruption episodes occurred 11,000 years ago during a ~200 year-long paroxysm. During these, stable Plinian and collapsing sub-Plinian columns erupted from multiple sequential and...
Conference Paper
Full-text available
The Tongariro Volcanic Complex (TVC) on the North Island of New Zealand is a subduction related, active andesitic volcano composed of 12 overlapping vents located along a 13 km long graben axis within a tectonic rift. Over a brief (200 year) period ~11 ka BP, the largest explosive eruption episodes known from this volcano occurred. The activity was...
Presentation
Full-text available
El volcán Nevado de Toluca o Chicnauhtécatl, la cuarta cumbre más alta de México (4,680 m.s.n.m., en el Pico del Fraile), es, desde 2013, un Área Natural Protegida en la categoría de Área de Protección de Flora y Fauna (APFF) de acuerdo con la legislación mexicana. A pesar del fácil acceso y la alta afluencia de visitantes del APFF Nevado de Toluca...
Conference Paper
Full-text available
Volcanic eruptions’ styles and intensities are largely controlled by magma’s rheological and chemical properties at storage and during ascent to surface. These properties are affected by changes in temperature, pressure, and volatile content. Understanding the impact of these changes on magma degassing’s kinetics constitutes a cornerstone towards c...
Poster
Full-text available
Novel insights into water-bearing rhyolitic magma degassing from 4D synchrotron experiments during controlled heating: either isothermal or constant heating profiles. Implications on eruptive dynamics.
Article
Full-text available
The Nevado de Toluca is a Natural Protected Area with the category of Area de Protección de Flora y Fauna, according to the Mexican legislation, since 2013. The volcano can be easily accessed and has a high influx of visitors; however it has no visible guidance material on site, which favors the deterioration of the area and increases the probabili...
Article
Full-text available
Over the past 5000 yr at Mount Taranaki, a Plinian eruption has occurred at least every 300 yr, with the latest in A.D. 1655. Based on detailed lithofacies analysis, three Plinian eruption scenarios are possible during future magmatic unrest at this volcano’s andesitic summit crater (2500 m high), or at the basaltic Fanthams Peak satellite vent (19...
Article
Full-text available
El Nevado de Toluca es, desde 2013, un Área Natural Protegida en la categoría de Área de Protección de Flora y Fauna de acuerdo con la legislación mexicana. El volcán cuenta con fácil acceso y con una alta afluencia de visitantes, sin embargo, no cuenta con información orientativa y visible in situ, lo cual favorece el deterioro de la zona y las si...
Article
Full-text available
Over the last 5000 years, at least 53 eruptive episodes have occurred at Mt. Taranaki (western North Island, New Zealand), from either its summit crater (~ 2500 m) or a satellite vent on Fanthams Peak (~ 1900 m). The magmas erupted have a wide range of compositions from basaltic to trachy-andesitic (~ 48–60 wt% SiO2). Five large-magnitude episodes...
Article
In this study, geochemical fingerprinting of glass shards and titanomagnetite phenocrysts was used to match twenty complex pyroclastic deposits from the flanks of Mt. Taranaki to major tephra fall “marker beds” in medial and distal deposition sites. These correlations hinged upon identifying time-bound compositional changes (a chemostratigraphy) in...
Article
Full-text available
Upper stratovolcano flanks contain the most nuanced depositional record of long eruption episodes, but steep, irregular terrain makes these sequences difficult to correlate and interpret. This necessitates development of a detailed and systematic approach to describing localized depositional facies and relating these to eruptive processes. In this...
Article
Understanding Open-Vent Volcanism and Related Hazards is a Special Paper (#498) of the Geological Society of America assembled to address new studies on active, open-vent volcanoes and their on-going processes, with the purpose of assessing related hazards. The Special Paper was produced after an international workshop in Costa Rica in 2011 and con...

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Cited By

Projects

Projects (5)
Project
Completing the first quantitative micro-CT study of microstructures of magma degassing in pyroclastic rocks associated to Holocene Plinian eruptions in Mexico. The results of this research will reveal quantitatively the processes of magma degassing that contribute to: a) the transport of magma to the surface, b) the subsequent formation of explosive eruptions of large intensity and magnitude in Mexico, and c) the generation of intensity fluctuations associated to eruptive style transitions.
Project
Determining the geomorphological and geological conditions associated with landslide genesis in mountain hillslopes and valleys of the State of Veracruz, Mexico, during 2013-2018. Our goal is to propose a landslide susceptibility mapping methodology tailored to extreme sequential environmental events. Further components are the estimation of the physical hazard vulnerability at key urban and rural locations, and the proposal of measures of hazard assesment and risk mitigation.