Some features of Late Upper Jurassic effusives of Priargunya and their metallogenic significance
Abstract
Over the last few years, many works on metallogeny of Eastern Transbaikalia have raised the question of the relationship between volcanism and hydrothermal formations. In some cases, volcanic structures are considered to be the most favorable sites for localization of mineralization, while in other cases, a closer (genetic and paragenetic) connection between volcanic and hydrothermal processes is assumed. Proponents of the latter point of view in support of their ideas refer to the age proximity of Late Mesozoic volcanogenic complexes and Late Mesozoic mineralization, to the confinement of volcanic formations and ore fields to the same regional structures, to the characteristic near‑surface appearance of ores of a number of deposits, to analogies with other ore districts, in particular, with the classical regions of development of "subvolcanic" deposits. While these arguments are convincing, they lack more direct, geochemical data on the links between volcanic and hydrothermal formations. The identification of such relationships is an important but very laborious task, involving the need to perform and compare a large number of diverse analyses. However, some characteristic petrographic features of the effusive formations of Priargunya can already be used in solving the question about the potential ore‑bearing capacity of those magmatic centers with which the effusives are associated ...
None
References
- Burianova I. Z., Favorskaya M. A. On the origin of globular lavas of the Southern Sikhote-Alin. Izvestiya AN SSSR, seriya geologicheskaya, No. 12, 1961.
- Vinogradov A. P. Average contents of chemical elements in the main types of erupted rocks of the Earth's crust. Geokhimiya, No. 7, 1962.
- Grigoriev D. P., Iskul E. V. Differentiation of some silicate melts as a result of formation of two immiscible liquids. Izvestiya AN SSSR, seriya geologicheskaya, No. 1, 1936.
- Eliseeva O. P. On the formation of globular lavas in acid effusives of the Kuramin Ridge. Izvestiya AN SSSR, seriya geologicheskaya, No. 5, 1960.
- Kazitsyn Yu. V., Kormilitsyn B. C., Strona P. A., et al. Mesozoic volcanic formations of Transbaikalia, regularities of their location and connection of mineral deposits with them. V sbornike: Rudonosnost' vulkanogennykh formatsiy. Nedra, 1965.
- Karapetyan K. I. Globular and ribbon-like isolations in trachyliparites of the Gegham Plateau (Armenian SSR). Trudy IGEM, vol. 90, 1963.
- Kotlyar V. N., Solovyev N. N., Tikhonov N. D. Geological features of deposits associated with ancient volcanic apparatuses. Geologiya rudnykh mestorozhdeniy, No. 5, 1963.
- Strona P. A. To the question about the sources of low-temperature hydrothermal mineralization in Eastern Transbaikalia. Geologiya rudnykh mestorozhdeniy, No. 4, 1962.
- Favorskaya M. A. Spherolitic lavas of the Kentsukhe River basin (Primorsky Krai). Trudy IGEM, vol. 90, 1963a.
- Favorskaya M. A. Spherolitic lavas of the Malazy River basin (Primorsky Krai). Trudy IGEM, vol. 90, 1963b.
- Fogelman N. A. Some features of geology and metallogeny of the Baleisko-Darasun gold-bearing district (Eastern Transbaikalia). Trudy TsNIGRI, vol. 41, 1962.