In the Neolithic Gavà mines, variscite and turquoise were exploited for ornaments manufacturing, although some prospective pits tunnels dug on other similar greenish minerals such as smectite or kandite. A 3D study of distribution mineral phases allows us to determine parameters involved in colours. Methods are comprised quantitative colourimetry, thin section petrography, SEM-BSE-EDS, EMPA, XR...

The island of Milos is an active mining site since the Antiquity. Exploitation began with extraction obsidian lumps and volcanic lavas tuffs specific type, that were used as millstones, sulphur alum (alunite). Currently, activity focused on perlite bentonite, even though some years ago, kaolin, silica, pozzolans barite also exploited. bentonite rather a specialty not commodity, it has multifunc...

The Hyperspectral Infrared Imager (HyspIRI) is a proposed NASA satellite remote sensing system combining a visible to shortwave infrared (VSWIR) imaging spectrometer with over 200 spectral bands between 0.38 and 2.5 μm and an 8-band thermal infrared (TIR) multispectral imager, both at 60 m spatial resolution. Short Wave Infrared (SWIR) (2.0–2.5 μm) simulation results are described here using Ai...

Abstract Both igneous and sedimentary rocks affected by water–rock interaction commonly form rhythmic Fe‐oxide bands that provide information on palaeo‐groundwater. This study investigated the formation of banded patterns concentrically concretions from Jurassic Navajo Sandstone (United States) claystone ‘zebra rock’ Neoproterozoic Johnny Cake Shale Member (Western Australia). Micro‐X‐ray fluor...

Acid-saline sediments in shallow-lake environments southwestern Australia host complex mineralogical suites representing long-term weathering and modern extreme acid-saline chemistry. It is not known whether large-scale reflectance spectroscopy datasets from watersheds across the Yilgarn Craton show regional variability. This study assesses over 2500 spectra of shallow subsurface by using autom...

Abstract Kaolin is widespread as a result of the alteration in San José Sn-Ag deposit located Oruro, Bolivia. This study presents chemical, mineralogical and thermal characterization kaolinitic deposit, which necessary to determine their optimal applications. Mineral phases these white silty materials were determined by X-ray diffraction (XRD) are quartz, kaolinite, K-feldspar, muscovite, illit...