Abstract
Results of the mineral and chemical study of surface-altered hyaloclastites from the Theistareykir and Nämafjall geothermal zones, the North Iceland rift, are considered. The paper scrutinizes the composition of hydrothermally altered rocks mainly consisting of clay minerals related to the transformation of bedrock hyaloclastites. The clay minerals also make up slope talus or proluvial deltas around highlands. The major clay minerals in areas of the present-day fumarole activity are kaolinite and smectite, while the redeposited talus-proluvial sediments are mainly composed of smectites. The studied rocks contain framboids, globules, rods, and other structures with morphology and size similar to those of mineralized bacteria. The local concentration of Ag in proluvial deposits is attributed to the intense bacterial activity. It is supposed that elevated contents of some trace elements could be related to an intense microbiotic influence.
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Árnason, B., Groundwater Systems in Iceland Traced by Deuterium Reykjavik: Societas Scientiarum Islandica, 1976, vol. 42.
Bakterial’naya paleontologiya (Bacterial Paleontology), Rozanov, A.Yu., Ed., Moscow: Paleontol. Inst. Ross. Akad. Nauk, 2002.
Drits, V.A and Sakharov, B.A., Rentgenostrukturnyi analiz smeshanosloinykh mineralov (X-Ray Structure Analysis of Mixed-Layer Minerals), Moscow: Nauka, 1976.
Einarsson, Th., Geology of Iceland. Rocks and Landscape, Reykjavik: Mal og Menning, 1994.
Geptner, A.R., Specific Features of Structure and Genetic Types of Volcanosedimentary Slope Sediments in Iceland, Byull. Komis. Izuch. Chetvertich. Perioda, 2005, no. 66, pp. 22–32.
Geptner, A.R. and Sokolova, T.N., Migration of Petrogenic Elements during the Formation of Zeolites in Basalts of Iceland, Litol. Polezn. Iskop., 1989, vol. 24, no. 1, pp. 3–14.
Geptner, A.R. and Petrova, V.V., Apophyllite and Gyrolite as Indicators of Low-Temperature Hydrothermal Alteration of Basaltoids, Litol. Polezn. Iskop., 1989, vol. 24, no. 6, pp. 100–115.
Geptner, A.R., Kristmannsdóttir, H., and Selezneva, M.A., Secondary Minerals of Basaltoids Altered by Hydrothermal Brine on the Reykjanes Peninsula (Iceland), Litol. Polezn. Iskop., 1987, vol. 22, no. 2, pp. 25–41.
Geptner, A.R., Ivanovskaya, T.A., and Pokrovskaya, E.V., Hydrothermal Fossilization of Microorganisms at the Earth’s Surface in Iceland, Litol. Polezn. Iskop., 2005, vol. 40, no. 6, pp. 1–19 [Lithol. Miner. Resour. (Engl. Transl.), 2005, vol. 40, no. 6, pp. 505–520].
Geptner, A.R., Ivanovskaya, T.A., and Pokrovskaya, E.V., Hydrothermally Altered Clayey Sediments in the Rift Zone of Iceland (Influence of Microbiota on Accumulation of Minor Elements), Litol. Polezn. Iskop., 2006, vol. 41, no. 4, pp. 1–14 [Lithol. Miner. Resour. (Engl. Transl.), 2006, vol. 41, no. 4, pp. 332–343].
Gerasimovskii, V.I., Polyakov, A.I., Durasova, N.A., et al., Islandiya i sredinno-okeanicheskii khrebet. Geokhimiya (Iceland and the Mid-Atlantic Ridge: Geochemistry), Moscow: Nauka, 1978.
Gibson, I.L., Kirpatrik, R.J., Emmerman, R., et al., The Trace Element Composition of the Lavas and Dikes from a 3-km Vertical Section Through the Lava Pile of Eastern Iceland, J. Geoph. Res, 1982, vol. 87, no. B8, pp. 6532–6546.
Kristmannsdóttir, H., Alteration in the IRDR Drill Hole Compared with Other Drill Holes in Iceland, J. Geophys. Res., 1982, vol. 87, no. B8, pp. 6525–6531.
Kristmannsdóttir, H., Ildefons, Ph., Bertaux, J., and Flank, A.M., Crystal-Chemistry of Mg-Si and Al-Si Scales in Geothermal Waters, Iceland, in Abstract of Papers, Proc. of the 5th Int. Symp. on Geochemistry of the Earth’s Surface, Reykjavik, 1999, pp. 519–522.
Kurnosov, V.B., Geptner, A.R., and Petrova, V.V., Hydrothermal Lithogenesis, in Osadochnye basseiny: metodika izucheniya, stroenie i evolyutsiya (Sedimentary Basins: Investigation Methods, Structure, and Evolution), Leonov, Yu.G. and Volozh, Yu.A., Eds., Moscow: Nauchnyi Mir, 2004, pp. 272–306.
Mineraly. Spravochnik (Minerals: Reference Book), Moscow: Nauka, 1992, vol. 4, no. 2.
Rentgenografiya osnovnykh tipov porodoobrazuyushchikh mineralov (sloistye i karkasnye silikaty) (X-Ray Diffraction Analysis of the Main Types of Rock-Forming Minerals: Phyllosilicates and Tectosilicates), Leningrad: Nedra, 1983.
Rentgenovskie metody isucheniya i structura glinistykh mineralov (X-Ray Analysis Techniques and Structure of Clay Minerals), Braun, G., Ed., Moscow, Mir, 1965.
Schmincke, H.-U., Lothar, G.V., Brendon, J.G., and Pritchard, R.G. Volcaniclastic Rocks of the Reydarfjordur Drill Hole, Eastern Iceland, 1. Primary Features, J. Geophys. Res., 1982, vol. 87, no. B8, pp. 6437–6458.
Walker, G.P.L., Zeolite Zones and Dyke Distribution in Relation to the Structure of the Basalts in Eastern Iceland, J. Geol., 1960, vol. 68, pp. 515–525.
Zhegallo, E.A., Rozanov, A.Yu., Ushatinskaya, G.T., et al., Atlas of Microorganisms from Ancient Phosphorites of Khubsugul (Mongolia), Huntsville, Alabama, USA, 2000.
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Original Russian Text © A.R. Geptner, T.A. Ivanovskaya, E.V. Pokrovskaya, S.M. Lyapunov, A.T. Savichev, A.V. Gorbunov, N.V. Gor’kova, 2007, published in Litologiya i Poleznye Iskopaemye, 2007, No. 5, pp. 503–529.
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Geptner, A.R., Ivanovskaya, T.A., Pokrovskaya, E.V. et al. Hydrothermally altered hyaloclastites at the Earth’s surface in the rift zone of Iceland: Problem of the biochemogenic accumulation of trace elements. Lithol Miner Resour 42, 453–476 (2007). https://doi.org/10.1134/S0024490207050045
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DOI: https://doi.org/10.1134/S0024490207050045