UNIQUE LOCATION OF HYDROTHERMAL BIOTA IN THE LOWER CAMBRIAN SEDIMENTARY–VOLCANOGENIC COMPLEX OF THE KYZYL–TASHTYG ORE FIELD (Eastern Tuva)
A.A. Terleev1, V.A. Simonov2, A.V. Kanygin1, D.A. Tokarev1, S.I. Stupakov2, A.V. Kotlyarov2
1A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Koptyuga 3, Novosibirsk, 630090, Russia
2V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
Keywords: Hydrothermal biota, Lower Cambrian sedimentary-volcanogenic sequences, Kyzyl–Tashtyg pyrite deposit, Eastern Tuva
Abstract
Study of Early Cambrian sedimentary-volcanogenic complexes hosting the Kyzyl–Tashtyg pyrite deposit in Eastern Tuva has revealed cyanobacteria and algae that existed in zones of ore-forming hydrothermal systems similar in characteristics to present-day “black smokers” at ocean bottoms. Along with archaeocyaths and Cyanophyta from the host sedimentary rocks and microfossils from basalt amygdules, various cyanobacteria, monocyatheans, and sponge spicules have been found in ferrosiliceous deposits and metasedimentary rocks. Scanning electron microscopic, mineralogical, and thermobarogeochemical studies helped to reconstruct their hydrothermal environment.
DOI: http://dx.doi.org/10.1016/j.rgg.2013.12.004
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