Distribution and speciation of mercury (Hg) in the sediments from a tropical estuary (Godavari estuary) was influenced by the changing physico-chemical parameters of the overlying water column. The sediments from the upstream and downstream of the estuary were uncontaminated but the sediments from the middle of the estuary were contaminated by Hg. The concentrations of Hg became considerably le...

Open spaces in epithermal veins of the Bohemia mining district, Oregon, USA, filled with sediments during hydrothermal activity. These sediments consist mainly of chalcedony, rock fragments, and vein quartz fragments. In addition, hematite is deposited during stage three of the vein development. Observed sedimentary features include draping laminae, erosion surfaces, slumping, and graded beddin...

The purpose of this article was to compile four separate digital thematic maps temperature and ice content permafrost, the active layer thickness, cryogenic processes in Yakutia as a basis for assessing changes modern climate anthropogenic disturbances. In work, materials on permafrost were used, serving compiling landscape map Republic Sakha (Yakutia). compiled using ArcGIS software, which sup...

Modern satellite gravity missions and ground gravimetry provide operational data models that can be used in various studies geology, tectonics, climatology, etc. In the present study, sedimentary basins southern part of East European Platform adjoining areas including Caucasus are studied by employing approach based on decompensative anomalies. The new model sediments, implying their thickness ...

Abstract This article presents the results of an integrated interpretation measurements made using Audio-Magnetotellurics and Seismic Reflection geophysical methods. The obtained were used to build model shallow subsurface cover consisting Cenozoic deposits, which then formed basis for a detailed lithological tectonic deeper Mesozoic sediments. Such covers, mainly glacial Pleistocene are typica...

A study was undertaken to investigate the structure and condition of urban permafrost in city Yakutsk. The response recent climate change assessed for a Shergin Shaft site cryogenic landscape. results indicate that thickness active layer which consists anthropogenic soils experienced no during second half 20th century early 21st century. However, thermal state underlying alluvial sediments has ...

Factors affecting the transport and retention of Cd, Cr, Cu, Ni, Pb and Zn in acidic groundwaters as they pass through estuarine sediments were investigated using column experiments. Acidic groundwaters caused the rapid dissolution of iron sulfide (AVS) and other iron and manganese phases from sediments that are important for metal binding and buffering. Metal breakthrough to overlying water oc...

Chromium exists in sediments in two oxidation states: Cr(III), which is relatively insoluble and nontoxic, and Cr(VI), which is much more soluble and toxic. Chromium(VI) is thermodynamically unstable in anoxic sediments, and acid-volatile sulfide (AVS) is formed only in anoxic sediments; therefore sediments with measurable AVS concentrations should not contain toxic Cr(VI). If this hypothesis h...

We report erosion rates and processes, determined from in situ-produced beryllium-10 (Be) and aluminum-26 (Al), across a soil-mantled landscape of Arnhem Land, northern Australia. Soil production rates peak under a soil thickness of about 35 cm and we observe no soil thicknesses between exposed bedrock and this thickness. These results thus quantify a welldefi ned ‘humped’ soil-production funct...