نتایج جستجو برای: geochemical potential mapping
تعداد نتایج: 1258017 فیلتر نتایج به سال:
Bauxite deposit of Permo-Triassic age in northeast of Bukan was developed stratiformly along the boundary between Ruteh and Elika formations, and includes four distinct rock units. This deposit was affected by tectonic and morphological processes. Mineralogical and geochemical investigations showed that during weathering processes, two mechanisms of ferrugenization and deferrugenization played ...
The hydrothermal mats, mounds, and chimneys of the southern Guaymas Basin are the surface expression of complex subsurface hydrothermal circulation patterns. In this overview, we document the most frequently visited features of this hydrothermal area with photographs, temperature measurements, and selected geochemical data; many of these distinct habitats await characterization of their microbi...
There is particular concern in Western Europe about the environmental problems, and urgent and concerted international action is warranted. An evaluation of the present state of pollution requires systematic, compatible data on the present distribution as well as the preindustrial, natural distribution of chemical elements in surface environments. The appliance of overbank sediments from river ...
Molecular organic geochemical proxies are increasingly being utilized to reconstruct past environmental conditions as new tools continue to be discovered and developed. To date, organic geochemical proxies have been developed mainly for use in marine systems and are widely used in paleoceanography. In contrast, organic proxies have been less commonly used on lacustrine sedimentary records. One ...
Geochemical background is the basis of anomaly evaluation in mineral exploration and environmental investigation. However, value obtained from secondary media inevitably affected by weathering, transportation, sorting, which leads to depletion or enrichment chemical elements. This problem can be avoided geochemical mapping exposed crust. In this paper, more than 38,000 samples rocks data were c...
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