Petrographic-geochemical characteristics of granitoids and their epigenetic alteration products in paleovalley fields (Vitim uranium-ore site)

20th International Scientific Symposium of Students, Postgraduates and Young Scientists on "Problems of Geology and Subsurface Development"

Kuznetsova, E.S.^1 ; Domarenko, V.A.^1 ; Matveenko, I.A.^1

Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk

634050, Russia^1

关键词: Biotite granite;    Element compositions;    Epigenetic alterations;    Geochemical characteristic;    Gravel deposit;    Natural uranium;    Uranium ore;    Weathering crust;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/43/1/012005/pdf
DOI  :  10.1088/1755-1315/43/1/012005

来源: IOP

【 摘 要 】

The study describes the results of the mineral and element composition of granitoids in basement and weathering crust of Khiagdinsk ore field in Vitim uranium ore site. It has been stated that granitoids in basement consist of leucocratic biotite granite of subalkaline group. The major rock-forming, accessory (apatite, zircon, sphene (titanite), magnetite, monazite, xenotime), and uranium-bearing minerals have been determined. Weathering crust is composed of unlithified or weakly lithified sediments, among which sandy and sandy medium gravel deposits have been distinguished in terms of mineralogical and granulometric texture. High radioactivity of granitoids was revealed in thorium-uranium basement and natural uranium. The combination of the specified factors presupposes that granitoids of Vitim uranium ore site may be a source of uranium in the fields of the paleovalley type.