Thermo-physical rock properties of greywacke basement rock and intrusive lavas from the Taupo Volcanic Zone, New Zealand

Mielke, Philipp; Weinert, Sebastian; Bignall, Greg; Sass, Ingo

doi:10.1016/j.jvolgeores.2016.06.002

Cited by 42 publications

(37 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Basalt rocks, as a crystalline igneous rock, have tightly interlocked crystals which affect heat and compressional waves. This can be seen obviously comparing with other rock types [14]. However, studies on thermo-physical rock properties evaluations under high pressure, temperature and fluid saturation are very rare, due to the technical effort needed.…”

Section: Resultsmentioning

confidence: 79%

“…The effect of such cracks on density, heat and compressional wave velocity is less noticeable in saturated rocks. This is probably caused by contact resistance reduction by the fluids [14]. [43] and [44] stated that if the porosity is increased by a factor of 3 to 4 then the strength will be decreased by a factor of 8.…”

Section: Resultsmentioning

confidence: 99%

“…[19] investigated mineral crystal size and microstructure for their effect on thermal conductivity and permeability correlation. [14] presented the data which expected to improve the statistical confidence on geophysical and thermo-hydro-mechanical numeric models data. In addition, he examined the ability to predict rock properties at greater depths of the Taupo Volcanic Zone in New Zealand.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermo-Physical and Mechanical Properties of Al Hashimiyya Basaltic Rocks, Jordan

Al-Zyoud¹

2019

IJG

View full text Add to dashboard Cite

Geothermal exploration in northern Jordan is in juvenile phase. North eastern basaltic desert is expected to host, with other rock formations, a shallow geothermal field. For efficient geothermal potential evaluation, a complete understanding of thermo-physical properties of deep reservoir rocks is of utmost importance. Due to the complex technical thermo-physical evaluations of basalts in depth, surficial basalts extending to the west were evaluated. Accordingly, six basaltic sub-flows from Al Hashimiyya were examined into their thermo-physical and mechanical properties. The flows represent the western extinction of large olivine basalt eruption. Different properties were evaluated for oven dried samples: thermal conductivity, permeability, porosity, density and specific heat capacity. In addition, basalts mechanical properties were examined: compressional wave velocity, unconfined compressive strength, indirect tensile strength and point load tests. The results were correlated in proportional patterns. They indicated that thermal conductivity of the studied basalts is dependent on porosity and permeability in parallel with mineral composition. It's found that mechanical properties are controlled by porosity and permeability, too. The studied basalt properties exhibit slight deviation from the continental basalts thermo-physical and mechanical properties reported in the region. Thermal conductivity ranges between 1.89 and 1.32 W•m −1 •K −1 , whereas the porosity and permeability averages at 10.64% and 9.75899E−15 m 2 , respectively. Additionally, unconfined compressive strength averages at 104.9 Mpa and it's almost 20 times higher than indirect tensile strength which ranges from 8.73 to 2.21 Mpa. As the samples were tested under laboratory conditions, in situ conditions will not be reflected by such values. At greater depth, temperature, pressure and hydrothermal activities will certainly affect rock properties. Micro fractures, whether it will be filled or not, will affect basalts properties, too. The results of this work will be used to develop a comprehensive thermo-physico-mechanical How to cite this paper: Al-Zyoud, S. (2019) Thermo-Physical and Mechanical Properties of Al Hashimiyya Basaltic Rocks, Jordan.

show abstract

Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermo-Physical and Mechanical Properties of Al Hashimiyya Basaltic Rocks, Jordan

Al-Zyoud¹

2019

IJG

View full text Add to dashboard Cite

show abstract

“…Geothermal exploitation in magmatic -volcanic fields where convection dominates heat transfer is well developed (Moeck, 2014). Such fields exist above subduction areas like in the western pacific area (Heise et al, 2016;McNamara et al, 2016;Mielke et al, 2016;Ratouis and Zarrouk, 2016;Wilmarth and Stimac, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Outcrop studies are commonly used for geothermal exploration (Aretz et al, 2015;Götz, 2015, 2011). Previous reservoir characterizations were led on similar rocks in several areas like New Zealand (Cant et al, 2018;Mielke et al, 2016Mielke et al, , 2015Siratovich et al, 2014), Philippines (Stimac et al, 2004), Faroe Islands (Ólavsdóttir et al, 2015) and Mexico (Lenhardt and Götz, 2011). These studies performed both 4 on samples from outcrops and cores provided large datasets of petrophysical properties providing data to constrain numerical models with real measured properties.…”

Section: Introductionmentioning

confidence: 99%

Petrophysical properties of volcanic rocks and impacts of hydrothermal alteration in the Guadeloupe Archipelago (West Indies)

Navelot

Géraud

Favier

et al. 2018

Journal of Volcanology and Geothermal Research

View full text Add to dashboard Cite

The GEOTREF project aims at developing high enthalpy geothermal energy in fractured reservoirs. It focuses on active volcanic islands and especially on the Basse-Terre Island (Guadeloupe archipelago). As part of this project we measured several petrophysical properties to better understand how fluids flow in the hydrothermal system, provide a set of parameters to modelers and build dataset for the future interpretation of * Corresponding author at: UMR 7359 GeoRessources, Ecole Nationale Supérieure de Géologie. 2 Rue du Doyen Marcel Roubault-BP 10162. 54505 Vandoeuvre-lès-Nancy cedex .K-1). Specific heat capacity is close for all lithothypes (0.75-0.97 kJ.kg-1 .K-1). Advancing hydrothermal alteration removes magnetic minerals and transforms initial rocks by replacing initial plagioclases and pyroxenes in neoformed chlorite, white micas, quartz, epidote and clay minerals modifying the shape of pore network. Hydrothermal alteration results in a reduction of pore throat diameters. It tends to decrease petrophysical differences between lavas and debris flows increasing porosity and permeability of effusive rocks while the opposite effects are observed in debris flows.

show abstract

The influence of alteration and fractures on gas permeability and mechanical properties of the sedimentary and volcanic rocks of the Acoculco Caldera Complex (México)

Ramírez-Guzmán,

Pola,

Macias

et al. 2024

Bull Eng Geol Environ

View full text Add to dashboard Cite

Petrophysical and mechanical properties of limestones and volcanic altered and unaltered rocks were estimated by a series of laboratory measurements. The aim of this work was to study the changes in matrix permeability and the influence of an induced vertical fracture. The phenomenon was studied by direct comparison of different properties (porosity, UCS, permeability) and by a multiple linear regression analysis. Porosity, UCS, and matrix permeability of limestones and non-altered volcanic rocks showed homogeneous values. However, the permeability increased from poor to moderate after fracture induction (10–17 to 10–14 m2). Altered volcanic specimens showed a more complex pore system. Thus, considerable variations in all measured properties were identified. For example, porosity ranged from 6 to 50% and Permeability ranged from 10–14 to 10–12 m2. Comparison plots including UCS, porosity, and matrix permeability showed a good fitting (R2=0.75). Multiple linear regression analysis in fractured specimens has a moderate R2 (0.55) The model that better explains the permeability evolution of fractured specimens has the fracture permeability as the response variable and the porosity values as independent variables. The usage and repeatability of these equations in other zones should include more singularities of every single specimen as pore size, pore distribution, and fractures.

show abstract

Thermo-physical rock properties of greywacke basement rock and intrusive lavas from the Taupo Volcanic Zone, New Zealand

Cited by 42 publications

References 42 publications

Thermo-Physical and Mechanical Properties of Al Hashimiyya Basaltic Rocks, Jordan

Thermo-Physical and Mechanical Properties of Al Hashimiyya Basaltic Rocks, Jordan

Petrophysical properties of volcanic rocks and impacts of hydrothermal alteration in the Guadeloupe Archipelago (West Indies)

The influence of alteration and fractures on gas permeability and mechanical properties of the sedimentary and volcanic rocks of the Acoculco Caldera Complex (México)

Contact Info

Product

Resources

About