Features of formation of lacustrine mineral resources

The conditions of the formation of nonmetallic and ore minerals in limnogenic structures are considered. It has been established that lakes are natural enriches of a wide range of useful components - silicate, carbonate, water-soluble, ore, organomineral. The most significant minerals of modern lakes, in addition to water, are: sapropel, diatomite, lime and mineral salts. Deposits of sand, clay, oil shale, oil and gas, coal, phosphorites, zeolites, evaporites, bauxites, ferromanganese, copper ores, placer minerals, and some rare and dispersed elements are associated with limnogenic complexes of different ages. It is shown that a greater variety of minerals of ancient lacustrine complexes compared to modern ones is associated both with variations of lacustrine lithogenesis in the past and with post-sedimentation transformations of sedimentary matter. In particular, epigenetic enrichment of ancient lacustrine complexes with ore components is noted. It was revealed that hydrocarbons and diatomites of lacustrine genesis are of a higher quality compared to similar minerals of marine genesis. It is noted that evolutionary changes in the processes of accumulation of limnogenic minerals have affected to the greatest degree biogenic and chemogenic components. An example of this is the progressive accumulation of caustobiolites and the sulfate evolution of evaporites in lacustrine structures during the Phanerozoic. An analysis of the genetic characteristics of lacustrine minerals makes it possible to develop new exploratory traits of a number of sedimentary deposits.

Vertical flows of substance in the Northern arctic ocean

The monthly, seasonal and annual quantity estimates of vertical fluxes of sedimentary matter from the surface layer of the Arctic Ocean, performed out over the years by various researchers, are the basis for direct calculations of incoming chemical components, minerals, and various pollutants to the surface layer of bottom sediments.

Concentration and composition of the suspended particulate matter of the Barents sea

The results of the study of the distribution and composition of the dispersed sedimentary matter (suspended matter) in the water column of the Barents Sea were presented in the article. The distribution of suspended matter in the sea obeys the laws of circumcontinental (for surface distribution) and vertical zonality. At the same time, the absolute values of the weight and volume concentrations of the suspended matter themselves are low (on average less than 0.5 mg/l and less than 1.0 mm3/l, respectively). The highest values of all parameters of the suspended matter were found in the Pechora Sea, the most southeastern part of the Barents Sea, where the abrasion of the shores and bottom erosion, and the Pechora River runoff. Surface and bottom peaks are characteristic of the vertical distribution of the suspended matter. An intrusion of the nepheloid layer enriched in the suspended matter into the deep layers can be observed on the continental slope when the depth makes a sharp fall.

Device of registration the lateral flow of sedimentary matter

A new sedimentation device was developed and tested. "Device of registration the lateral flow of sedimentary matter" is intended for sampling a sedimentary particulate matter moving in the water column in the lateral directions. The device can be successfully used to solve sedimentological, biological, ecological problems, including the monitoring of solid pollutants transfer.

Dispersed sedimentary matter of the Barents sea

The results of the study of the distribution and composition of the dispersed sedimentary matter (suspended matter) in the water column of the Barents Sea were presented in the article. The distribution of suspended matter in the sea obeys the laws of circumcontinental (for surface distribution) and vertical zonality. At the same time, the absolute values of the weight and volume concentrations of the suspended matter themselves are low (on average less than 0.5 mg/l and less than 0.6 mm3/l, respectively). The highest values of all parameters of the suspended matter were found in the Pechora Sea, the most southeastern part of the Barents Sea, where are the abrasion of the shores and the bottom and the Pechora River runoff. Surface and bottom peaks are characteristic of the vertical distribution of the suspended matter. A mild intrusion of the nepheloid layer enriched in the suspended matter into the deep layers was observed on the continental slope of the Bear Island Trench when the depth makes a sharp fall.

Horizontal flow of sedimentary matter in the coastal zones of Barents and White seas

The first data on the scale of the lateral movement of the sessile in the water column are obtained. It is established that the scale of the lateral movement of suspended matter in the coastal regions is 50-210 times greater than the vertical flow of matter to the bottom.