Voznesenskoe gold ore deposit (Southern Urals): Geological structure, ore-bearing rock geochemistry, geodynamic formation conditions
نویسندگان
چکیده
Research subject . The geological structure, petro-geochem ical features of the ore-bearing rocks Voznesenskoe gold ore deposit (Southern Urals) and geodynamic conditions its formation. Methods content petrogenic oxides was determined using silicate analysis; rare elements were determ ined ICP-MS methods by an EIAH 9000 mass spectrometer ICP-AES ICPE-9000 spectrometer. Results is confined to a fragment crustal part section harzburgite-type island-arc ophiolites. ophiolite composed taxite gabbroids, sequence dolerites, basalts, basaltic andesites their tuffs, in places separated from gabbroids lenses serpentinites, package subparallel dikes porphyry gabbro-dolerites, gabbro-diorites, diorites. Volcanics dyke with normal alkalinity tholeiitic composition exhibit geochemical characteristics suprasubduction formations. In terms chemical composition, they are comparable volcanic pyritebearing complexes Baimak-Buribaevskaya Formation (D 1 e 2 ). At same time, Voznesensky have number distinct features, which likely be related setting particular, effusive dykes differ pyrite-bearing higher titanium content, absence boninite silicic rocks, as well predominance rock types. Conclusion conducted analysis data V-Ti/1000 La N /Sm -TiO diagrams suggests that association mafic gabbro-diorites diorites formed back-arc basin Late Ems frontal island arc.
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ژورنال
عنوان ژورنال: Litosfera
سال: 2022
ISSN: ['2500-302X', '1681-9004']
DOI: https://doi.org/10.24930/1681-9004-2022-22-3-391-403