Geological processes leading to lithium-rich rare metal (RM) pegmatites and granites remain poorly constrained. To acknowledge geological processes related to Li-rich melt generation, we applied complementary approaches in the Montagne Noire (MN) and in the Monts d’Ambazac (MA). In the MN, the mineralogy of pegmatite clusters depends of the nature ...
Published in Moscow University Geology Bulletin
Abstract—This article describes the geological structure of the Sarsangi gabbro–diorite–plagiogranite complex located in the boundary zone between the Middle and South Urals. The formation of its massifs took place in the Late Silurian in the abyssal zone at approximately 6.5–7.0 km. The temperature ranges of crystallization of granodiorites and ga...
Published in Frontiers in Earth Science
Triple oxygen isotopes of hydrothermally altered minerals from crystalline rocks can be used to determine past elevations of mountain ranges. This method uses all three isotopes of oxygen (16O, 17O, and 18O) to create arrays that can be extrapolated back to the meteoric water line. One advantage of this technique is that it relies only on oxygen is...
Published in Doklady Earth Sciences
AbstractThe study of granites in the basement of the Western Siberian platform is highly relevant since they are associated with hydrocarbon deposits, which are located not only above the granite massif, but also within the metasomatically altered upper layer of granites. At the same time, granites are most easily and reliably dated by zircon, whic...
Published in Russian Journal of Pacific Geology
This paper reports the geochemical, U–Pb geochronological, and Sm-Nd isotopic–geochemical data on granites of the Medvedka Massif in the northern part of the Nora–Sukhotino terrane. It has been found that these granites have an age of 378 ± 3 Ma. They contain ferruginous silicates, have high iron index (FeO*/(FeO*+MgO)), low concentrations of Al2O3...
Published in Geology of Ore Deposits
Abstract—Metasomatic alterations in cataclased granites of the Primorsky Complex PR1 in the Southern Siberian Craton are represented by albitization and riebeckitization, accompanied by microclinization, dolomitization and completed by the formation of hydrothermal quartz–carbonate veins. Albitization, epidotization, and carbonatization are occurre...
The Kolyvan’–Tomsk folded zone (KTFZ) is a late Permian collisional orogen in the northwestern section of the Central Asian Orogenic Belt. The Mesozoic history of the KTFZ area includes Late Triassic–Early Jurassic and Late Jurassic–Early Cretaceous orogenic events. The earlier event produced narrow deep half-ramp basins filled with Early–Middle Ju...
Published in Frontiers in Earth Science
Diorites, granites, and associated magmatic enclaves and dykes constitute the bulk of the Ladakh Batholith, which is an integral part of the Trans-Himalayan magmatic arc system. In this paper geometry of microgranular enclaves hosted in the granites has been examined from the Leh-Sabu-Chang La and surrounding regions of the eastern Ladakh Batholith...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Fracture mechanism and dynamics is studied with a time resolution of 2 ns in the quartz, granite, gabbro-diabase, and calcite samples in a shock wave field. It is found out that jets of positively charged ions are ejected from the shock-loaded surface of minerals. The structure of the surface layer of these rocks after loading by shock wav...
Published in Doklady Earth Sciences
AbstractPlagioclase varieties from leucogranites of the Raumid pluton (Pamirs) were studied by isotope Rb–Sr method. The studied varieties are: (1) fresh, crystal-clear magmatic oligoclase and (2) altered by deuteric saussuritization, turbid plagioclase. Comparison of data obtained for the coexisting varieties shows that saussuritization of the leu...
