This paper presents a new method—the Technique of Iterative Local Thresholding (TILT)—for processing 3D X-ray computed tomography (xCT) images for visualization and quantification of rock fractures. The TILT method includes the following advancements. First, custom masks are generated by a fracture-dilation procedure, which significantly amplifies the fracture signal on the intensity histogram ...

Abstract: This work proposes the methodology to obtain a correlation between particle size of rock material and point load test index (Is 50), in order characterize materials, present mining projects terms resistance. For correct development activities, both open pit (quarries) underground (mines), it is important determine compressive strength rocks, since, through it, geomechanical classifica...

The thermo-hydraulic-mechanical behaviour of a large in situ heating test, the Buffer/Container Experiment (BCE), carried out at Atomic Energy of Canada’s underground research laboratory, is considered. The work can be seen as an extension of the authors’ previous research, investigating the behaviour of a large-scale test, the socalled ‘isothermal test’, to now include heating effects. Suggest...

At the southernmost part of Tierra del Fuego a few outcrops and erratic boulders of alkali basaltic rocks with ultramafic enclaves have been studied. Alkali basalt plugs or pipes hitherto identified are scarce, and host rocks are constituted by slates that belong to Mesozoic deposition. The petrography, texture and composition of the basalt and xenoliths were investigated by petrographic micros...

El objetivo de esta investigación ha sido caracterizar la naturaleza química y mineralógica del pigmento empleado en los motivos esquemáticos prehistóricos cueva Los Buitres 1 (Capilla, Badajoz), tratar identificar presencia materia orgánica su composición. Para ello se han realizado análisis espectroscopia Micro-Raman ATR-FTIR sobre cuatro muestras pigmento, tres rojo una más también roja, aun...