NDLI: New results of geochemical and geophysical studies of the Khadatkandskii fault zone (North Transbaikal region)

Content Provider	Springer Nature Link
Author	Budyak, A. E. Parshin, A. V. Damdiv, B. B. Reutsky, V. N. Spiridov, A. M. Volkova, M. G. Bryukhava, N. N. Bryansky, N. V.
Copyright Year	2015
Abstract	The study objects are the Khadatkandskii fault zone, the Khadatkanda gold–uranium deposit confined to it, and sediments of the Kodar (Ikabi, Ayan, and Inyr formations) and Chinei (Chitkanda, Aleksandrovka, and Butun formations) groups located at significant distance from the above-mentioned area. Complex geophysical and geochemical studies of rocks and ores are performed. The obtained geochemical and mineralogical data indicate that the Khadatkanda gold–uranium deposit can be ascribed to the infiltration–epigenetic type. It is established that the uranium and gold mineralizations were formed at different times in relation to different geodynamic settings. The gold mineralization is related to the formation of the deep-seated Syulbanksii fault and has a juvenile source. The later Th–U mineralization originated during tectonic rejuvenation of the Syulbanksii fault zone, while the sources of radioactive elements were presumably the underlying sediments of the Kodar Group. This is confirmed by isotope studies. Metasomatically altered rocks with elevated Au content have δ$^{34}$S from +2 to +4‰ CDT, which is 4‰ lighter than the sulfur isotope composition of the U-bearing samples (from +6 to + 8‰).The possible applicability of geophysical methods to study of the Kodar–Udokan lithotectonic zone is discussed and the results of ground magnetometry and gamma radiometry are presented. The cryogenic conditions and abundance of coarse-grained material in the considered territory strongly hamper the implementation of geochemical and geophysical prospecting. It is suggested that the most promising prospecting tool for the gold and uranium mineralization in the mountainous Kodar–Udokan zone is ground magnetic surveying. The obtained information suggests that the Au and U deposits of the studied region are promising for the discovery of elevated PGE contents.
Starting Page	373
Ending Page	380
Page Count	8
File Format	PDF
ISSN	18197140
Journal	Russian Journal of Pacific Geology
Volume Number	9
Issue Number	5
e-ISSN	18197159
Language	English
Publisher	Pleiades Publishing
Publisher Date	2015-10-10
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	gold–uranium deposits geodynamics black shales VerkhneSyulbanksii ore district North Transbaikal region Geology
Content Type	Text
Resource Type	Article
Subject	Geology Geophysics Geochemistry and Petrology Oceanography Paleontology Stratigraphy

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