Alkaline lamprophyres of the Chatkal-Kuramin region (Middle Tian-Shan)

This article presents the results of studies of Mesozoic lamprophyre dikes in the basins of the Shavaz, Beshtor, Kichik rivers of the Chatkal-kuramin region. A geological characteristic is given, new types of dikes are identified and described, the patterns of their spatial distribution are studied and the sequence of formation is determined. Material composition study results of the dike rocks include: analysis of the distribution of rock-forming petrogenic elements of minerals for the most representative varieties; composition of the main and accessory mineral phases based on microprobe analysis; Distribution of admixture elements in rocks based on ICP-MS data. The authors’ views on the geodynamic nature of lamprophyric magmatism are considered, the conditions for the generation of the parental magmas of dikes and the issues of metallogenic specialization.

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