Although High Resolution X-ray CT (HRXCT/μ-CT) has become an invaluable tool for the 3D characterization of many materials, including natural stones [1], the technique suffers from some important limitations. A first shortfall of HRXCT is the limitation of resolution; although high-end X-ray tubes have a focal spot size of 400 nm (and therefore can deliver images with this spatial resolution), ...

topography and climate are two important soil forming factors affecting genesis and clay mineralogy of soils. calcareous and gypsiferous soils are widely spread in arid and semiarid parts of iran and palygorskite is a dominant clay mineral in these soils. the objectives of the study were to: (1) determine soil genesis and classification along the climotoposequence and (2) investigate clay miner...

Visible-near infrared (vis–NIR) spectroscopy has been widely used to characterize soil information from field global scales. Before applying a calibrated spectral predictive model acquire information, either independent validation or k-fold cross is evaluate performance. However, there no consensus on which strategy more suitable and robust when evaluating performance for the studies in differe...

clay minerals are considered the most important components of clastic reservoir rock evaluation studies. the shurijeh gas reservoir formation, represented by shaly sandstones of the late jurassic-early cretaceous age, is the main reservoir rock in the eastern kopet-dagh sedimentary basin, ne iran. in this study, x-ray diffraction (xrd), x-ray fluorescence (xrf), scanning electron microscopic (s...