Granite microporosity changes due to fracturing and alteration: secondary mineral phases as proxies for porosity and permeability estimation

Staněk, Martin; Géraud, Yves

doi:https://doi.org/10.5194/se-10-251-2019

Articles | Volume 10, issue 1

https://doi.org/10.5194/se-10-251-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/se-10-251-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 10, issue 1

Research article

|

04 Feb 2019

Research article |

| 04 Feb 2019

Granite microporosity changes due to fracturing and alteration: secondary mineral phases as proxies for porosity and permeability estimation

Martin Staněk and Yves Géraud

Data sets

Chemical compositions and structural formulas of phyllosilicates and throat size distributions of granite samples from the MEL-5 borehole Martin Stanĕk and Yves Géraud https://doi.pangaea.de/10.1594/PANGAEA.898002

Short summary

Granite is suitable to host geothermal wells or disposals of hazardous waste and in these cases the rock porosity and permeability are critical. Our detailed porosity and permeability data on variously deformed Lipnice granite yield a span of 5 orders of magnitude in permeability between the least and the most deformed facies. To facilitate the estimation of porosity and permeability in similar settings, we provide optical and chemical data on the characteristic minerals of each facies.