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The results of a study of rare-earth metals in dictyonema shales of the Paleozoic Baltic sedimentary basin are presented. In the territory of the studied Kaibolovo–Gostilitsy prospecting area, high up to potentially industrial rare-earth element (REE) contents were confirmed based on a large factual and analytical material. The average REE concentration was 289 g/t with maximums up to 724 g/t. REEs were found in dictyonema shales in various forms (mineral, organic, ionic, molecular, and colloidal). The occurrence of REEs in the mineral matter of dictyonema shales predominated. The fraction of heavy (and most valuable) lanthanides (15.6% on a total basis) in the test dictyonema shales was higher by a factor of 2 than that in ore deposits. This fact and the presence of large geological REE resources in the dictyonema shales of the Baltic region of Russia determine the need for their integrated development with other associated components. [ABSTRACT FROM AUTHOR]

The results of a study on the concentrations of rhenium and other valuable metals in oil shales from the Volga basin are presented. New data on the precise determination of Re, Co, Ni, Cu, Zn, U, and other metals by inductively coupled plasma mass spectrometry are presented. The test metal contents were compared with clarke values in carbonaceous shales. The association of metals (Mo, U, Co, Ni, Cu, Zn, Se, Ag, and Sb) with rhenium in oil shales was identified. The organic matter of oil shales acts as a concentrator of rhenium and, apparently, Mo and U. The preferred petrographic type of oil shales for the concentration of rhenium in them is the colloalginite–vitrinite–clay type. The rhenium and metal content of the Volga shales is compared with the concentrations of rhenium and a number of other valuable metals in the dictyonema shales of the Baltic sedimentary basin. [ABSTRACT FROM AUTHOR]

The levels of concentrations of valuable impurity elements in coals from a number of Sakhalin deposits were studied. It was established that all the studied deposits are potentially commercial metal-bearing in terms of Sc, REEs, Cs, Rb, and Sr. A wide range of valuable metals with minimal commercial concentrations—Ge, Sc, Mo, Y, W, Cs, Rb, Sr, and Sb—was identified in the Novikovskoye germanium–coal deposit (sections Vostochnyi 1 and Rezervnyi). An estimate of the predicted resources of valuable metals in this deposit was made, and the large resource potential of valuable metals in the coals of Sakhalin was concluded. [ABSTRACT FROM AUTHOR]

The concentrations and distributions of industrially valuable trace elements associated with germanium in the coals of the Spetsugli section of the Pavlovsk brown coal deposit in Primorskii krai was studied using mass spectrometry and laser microanalysis. The concentrations of a number of metals in traditional types of ores at a minimum industrial level were established. Geochemical associations of industrially valuable metals and other impurity elements were identified. Maximum concentrations of many trace elements in low-ash coals were noted. The distribution of a number of trace impurity elements in the coal matter and the macerals of coals was studied, and conclusions on the genesis of trace elements were drawn. [ABSTRACT FROM AUTHOR]