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Relation of hydraulic conductivity to depth, alteration, and rock type in the volcanic rocks of Pahute Mesa, Nevada, USA
A large data set of hydraulic conductivity ( K ) with depth was used to examine and isolate the influences of rock type, volcanic-rock alteration, and...
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Evaluation of weathering and alteration effects by rock change value (RCV) and weathering indices of volcanic rocks in the Şile Region (NW Turkey)
This study investigated the weathering progress and its effects on the physico-mechanical properties of andesitic rocks in the Şile Region (NW...
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Characterizing lithological, weathering, and hydrothermal alteration influences on volcanic rock properties via spectroscopy and laboratory testing: a case study of Mount Ruapehu volcano, New Zealand
The geomechanical characterization of volcanic material has important implications for geothermal and mineral exploration, engineering design,...
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Syn- to Post-emplacement Alteration Processes
We now consider the range of syn- to post-emplacement alteration processes and their effects on volcanic and associated sedimentary deposit types and...
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Hydrothermal alteration of the surface volcanic rocks at the Acoculco geothermal field, Mexico: a multi-parametric approach
The studies on hydrothermal alteration-induced effects in surface and subsurface rocks provide useful information in the characterization and...
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Challenges of Tunnelling in Volcanic Rock Masses
Volcanic rock masses exhibit temporal and spatial variability, even at the scale and duration of engineering projects. Volcanic processes are...
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Terminology for Volcanic Deposits and Rocks
In many modern active settings where eruptions and transportation processes have been witnessed, the naming of volcanic deposits and rocks can be...
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Epithermal Ag–Au mineralization at Galim-Legalgorou, Cameroon Volcanic Line: insights from alteration mineralogy and mineral chemistry of electrum and sphalerite
The Galim-Legalgorou area, located along the north-western branch of the Cameroon Volcanic Line (CVL), is known for artisanal gold mining and primary...
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Whole-rock oxygen isotope ratios as a proxy for the strength and stiffness of hydrothermally altered volcanic rocks
Hydrothermal alteration is considered to increase the likelihood of dome or flank collapse by compromising stability. Understanding how such...
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Multi-stage alteration history of volcanic clasts containing buddigtonite from Upper Cretaceous strata of the Subsilesian Unit, Czech part of the Outer Flysch Carpathians
Floods in 1997 and 2010 exposed the Frýdek and Frýdlant formations of the Subsilesian Unit in the Ostravice River bed near Frýdek-Místek. In the...
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Volcanic-Hosted Resources
Volcanoes and volcanic rocks are hosts to economically very significant quantities of natural resources. Initially, we provide a brief overview of...
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Deterioration of volcanic tuffs from rock dwellings in Brhlovce (Slovakia) induced by freeze-thaw cycling studied by non-destructive tests and µCT visualization
The aim of this paper is to evaluate the effect of freeze-thaw-induced weathering of volcanic tuffs from the rock dwellings in the village of...
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Hydrogeochemical evolution and water–rock interaction processes in the multilayer volcanic aquifer of Yogyakarta-Sleman Groundwater Basin, Indonesia
Volcanic aquifers have become valuable resources for providing water to approximately 2.5 million people in the Yogyakarta-Sleman Groundwater Basin,...
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The influence of alteration and fractures on gas permeability and mechanical properties of the sedimentary and volcanic rocks of the Acoculco Caldera Complex (México)
Petrophysical and mechanical properties of limestones and volcanic altered and unaltered rocks were estimated by a series of laboratory measurements....
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Evaluation of the impact of fragile-ductile-fault-related hydrothermal alteration on geomechanical parameters in highly anisotropic mine environments—an improved linking of geology and rock mechanics
Predicting the behavior of damaged and hydrothermally altered rocks is the key to the economic success and safety of rock engineering projects, such...
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Volcano-stratigraphy and petrography of bimodal volcanic rocks suites of Mekane Selam area, northwestern Ethiopian volcanic plateau
The volcanic stratigraphy and petrography of compositionally bimodal volcanic rocks in the Mekane Selam area were characterized by detailed field...
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Fragmentation Processes in Magmas and Volcanic Rocks
In this chapter, we consider the many processes by which magma and volcanic rock can be fragmented. This comprehensive review describes the...
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Understanding the Impact of Alteration on Rock Mass Strength
Rock mass characterization is the cornerstone of informed engineering analysis and design. Consequently, it is imperative to have access to quality...
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Biotite as an indicator of post-eruptive cryptic alteration in the Battleship Rock Ignimbrite, Valles Caldera, NM, USA
The Battleship Rock Ignimbrite of the East Fork Member of the Valles Rhyolite (USA) consists of a variably welded compound cooling unit emplaced in...
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Multiscale petrophysical modeling and reservoir prediction of intermediate-basic volcanic reservoirs based on logging and seismic combination
Volcanic oil and gas resources are abundant and have been one of the principal focuses of research in the oil and gas industry for a long time. Due...
