1. The influence of secondary processes on the porosity of volcanic rocks: A multiscale analysis using 3D X-ray microtomography
- Author
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Anderson Camargo Moreira, Lucas Debatin Vieira, Alisson Rech Honorato, Orlando Faria Prado, Iara Frangiotti Mantovani, Breno Leitão Waichel, Celso Peres Fernandes, and Monique Becker
- Subjects
geography ,Radiation ,geography.geographical_feature_category ,Materials science ,X-ray microtomography ,Mineralogy ,010403 inorganic & nuclear chemistry ,01 natural sciences ,Hydrothermal circulation ,030218 nuclear medicine & medical imaging ,0104 chemical sciences ,law.invention ,Volcanic rock ,03 medical and health sciences ,Permeability (earth sciences) ,0302 clinical medicine ,Optical microscope ,law ,Percolation ,Crystallization ,Porosity - Abstract
The porosity of volcanic rocks can be strongly affected by secondary processes such as the percolation of water and hydrothermal fluids, thus promoting crystallization of secondary minerals in the pores. With an aim to evaluate the impact of secondary mineral fillings, this paper shows the segmentation of secondary and filled pores based on the micro-CT technique. The mineralogy of the sample was analyzed with optical microscopy. Multiscale analysis was performed to determine the total porosity before and after the processes. The results show the influence on the permeability parameter caused by crystallization.
- Published
- 2020