Abstract
In the different varieties of crystalline basement of Archean and Proterozoic age and in Vendian (Ediacaran) basal layers of platform coverture in the Central Basin of the Dniester River were found relatively high concentrations of Lanthanum, Cerium, Yttrium, Ytterbium, and Scandium. Because the petrographic formations, which are genetic associated with RE elements in Dniester region are absent, the origin of these elements is unclear. At the same time, in the geological mapping, it was detect that geochemical aureoles of REE, found in the northern region of Republic of Moldova, are generated by accessory minerals monazite and zircon present in the rock of basement platform and fragments of crystalline rock in the composition of terrigenous formations from basal levels of sedimentary coverture. Probably mentioned minerals are brought from Ukrainian Crystalline Shield regions, in which are spread varieties of granitic rocks and alkaline pegmatite. It is not excluded that in these basal layers in the sedimentogenes processes and differentiation of detrital material to be formed the mechanic aureoles rich in monazite and zircon, which in turn can form significant concentrations of rare earths. To solve the perspective problem of detection of industrial mineral accumulations of RE in the central region of the Dniester River basin, it is necessary to conduct within this area detailed geological and geochemical research.
Highlights
During the years 1982–1992, several special geological researches were carried out in the north-eastern part of the Republic of Moldova with the purpose of determining the metallogenetic features in this area
Information on previous geological works is included in the publication “Geology of USSR, Vendian is composed of Olchedayev Beds (Vol) XLV” [1]
In the northern and north-eastern regions of the Republic of Moldova we can highlight three geological-structural units: crystalline basement, sedimentary cover composed of diverse rocks, and PliocenePleistocene formations
Summary
During the years 1982–1992, several special geological researches were carried out in the north-eastern part of the Republic of Moldova with the purpose of determining the metallogenetic features in this area. In the northern and north-eastern regions of the Republic of Moldova (marked area in Figure 1) we can highlight three geological-structural units: crystalline basement, sedimentary cover composed of diverse rocks, and PliocenePleistocene formations. These three geological-structural units in terms of age, origin, and composition are different from each to other in a cardinal way. Due to shallow depths up to crystalline rocks of the basement and mineralization which contain elements of rare earths, discovered in the basal layers of sedimentary cover, the central region of the Dniester River basin has always made up a remarkable object of study for geological research
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call