Hyperspectral remote sensing is a powerful tool in discriminating lithological units and in preparation of mineral maps. Hyperion is a space borne sensor of Hyperspectral imagery having 220 channels within the 400 nm to 2500 nm wavelength range. Although the technical specifications of the sensor are quite high, in the operational stage there exist many nuisances like atmosphere. The presence o...

Field mapping, colour, particle size distribution, pH and x-ray diffraction studies were undertaken to elucidate the genesis of Ediki kaolin. The kaolin occurs within the Mungo formation of upper cretaceous age, ascribed to the Douala sedimentary basin. The kaolin profile consists of upward coarsening sandstone – siltstone – sandstone sequence with a gradient of 35 to 40°. Texturally, the kaoli...

Introduction: The NASA Stardust mission is expected to collect in low-density, silica aerogel more than 1,000 dust particles >10 μm in size from the dust coma surrounding Comet Wild-2. It is planned that Stardust will return these samples to Earth early in 2006. Removal of each particle from the aerogel increases the possibility of contamination or loss, thus we are developing a facility to per...

At Chaihuín marsh, south of Valdivia (39°56’ S/73°33’ W), a sand bed was deposited during the 1960 earthquake. The aim this study is to map tsunami deposit in detail and associate earlier layers with past tsunamis. Geologic field mapping by means stratigraphic sections constructed using 111 cores marsh revealed existence three layers. source these determined statistical comparison their sedimen...

Scarce platinum group elements (PGE) are mainly concealed in massive sulfides, and finding economically viable ore bodies largely relies on their fast chemical mapping. Most core scanners provide incomplete mineralogical contents, but none also a complete analysis including light elements. This study investigates the performance of fully automated laser-induced breakdown spectroscopy (LIBS) sca...

Abstract The Mars Mineralogical Spectrometer (MMS) is a hyperspectral imager onboard the orbiter of Tianwen-1, China’s first exploration mission. MMS consists 4 subassemblies: an Optical Sensor Unit (OSU), Electronics (EU), Calibration (CU), and Thermal Control Accessories (TCA). With 0.5 mrad IFOV 416-sample cell array for nadir observation, can map spectral spatial information Martian surface...

we prove a strong convergence result for a sequence generated by halpern's type iteration for approximating a common fixed point of a countable family of quasi-lipschitzian mappings in a real hilbert space. consequently, we apply our results to the problem of finding a common fixed point of asymptotically nonexpansive mappings, an equilibrium problem, and a variational inequality problem for co...