Acidic Lower Cretaceous subvolcanic and volcanic formations of the North Argun Depression
Abstract
In the complex history of Mesozoic magmatism and ore formation in Eastern Transbaikalia, the latest stages of the history, associated with the formation of numerous linearly elongated depressions of northeastern strike, are the least studied. They are bordered by large faults and are filled with Late Mesozoic sedimentary and volcanogenic rocks. It is to the depressions that the areas of the strongest manifestation of young tectonic movements and occurrence of the latest magmatic formations gravitate. Accordingly, the latest manifestations of hydrothermal mineralization in Eastern Transbaikalia are closely related to the depressions themselves or to the systems of faults surrounding them (gold deposits of the Baley type, deposits of fluorspar, ferberite‑antimonite ores of the Barun‑Shivey type, ore occurrences of antimonite, cinnabar, barite, etc.). The overwhelming majority, if not all these ore occurrences, belong to the type of low‑temperature hydrothermal formations of shallow depths. Both the source of this mineralization and its age are still controversial. However, in recent years the opinion has been expressed that this mineralization is related to the Lower Cretaceous volcanogenic complexes. Therefore, it is very important to study the history of Lower Cretaceous volcanism of Eastern Transbaikalia, in particular, to investigate various subvolcanic, vent, etc. formations, since in a number of geologically similar areas their location largely determines the distribution of mineralization ...
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References
- Vinogradov A. P. Regularities of distribution of chemical elements in the Earth's crust. Geokhimiya, No. 1 and 6, 1956.
- Sobolev V. S. Significance of ferruginousness of femic minerals. Mineralogicheskiy sbornik L'vovskogo geologicheskogo obshchestva, No. 4, 1950.
- Strona P. A. To the question about the sources of low-temperature hydrothermal mineralization in the Eastern Transbaikalia. Geologiya rudnykh mestorozhdeniy, No. 4, 1962.
- Fogelman N. A. Some features of geology and metallogeny of the Baleisko-Darasun gold-bearing district (Eastern Transbaikalia). Trudy TsNIGRI, vol. 41 1962.