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The influence of secondary processes on the porosity of volcanic rocks: A multiscale analysis using 3D X-ray microtomography

2021; Elsevier BV; Volume: 172; Linguagem: Inglês

10.1016/j.apradiso.2021.109657

1872-9800

Lucas Debatin Vieira, Anderson Camargo Moreira, Iara Frangiotti Mantovani, Alisson Rech Honorato, Orlando Faria Prado, M.R O.C. Assis R.R.P. Alv Becker, Celso Peres Fernandes, Breno Leitão Waichel,

Mineral Processing and Grinding

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.