EAP - earth publications

PUBLISHED
SINCE 1952

Estonian Journal of Earth Sciences

ISSN 1736-7557 (Electronic)
ISSN 1736-4728 (Print)

Open Access Journal

CiteScore: 1.4

Impact Factor (2022): 1.1

Silurian dolostones of eastern Lithuania; pp. 180–186

PDF | doi: 10.3176/earth.2010.2.07

Authors

Donatas Kaminskas, Giedrius Bičkauskas, Antanas Brazauskas

Abstract

Silurian dolostones representing the Jaani (Verknė and Jočionys formations (Fms)) and Minija (Pabradė Formation (Fm.)) regional stages were studied in the Jočionys 299 borehole located in eastern Lithuania. In addition to petrological studies, dolostones were subjected to XRD, XRF and ICP-MS analyses. X-ray diffraction analysis revealed that dolomite crystals in dolostones were very close to stoichiometric and well ordered and could be interpreted as early diagenetic. Strontium in dolostone of the Pabradė Fm. is comparable to that of other ancient dolomites, and is much lower than Sr concentrations in typical modern marine dolomites. Slight enrichment in Sr and S in the Verknė and Jočionys Fms is due to the presence of celestine (SrSO₄) and gypsum. Evaporative (sabkha), seepage-reflux, mixing-zone, burial and seawater dolomitization models of modern and ancient examples from literature were considered. For the Jočionys Fm. we suggest seepage-reflux and burial(?) models. Evaporative (sabkha) and mixing-zone dolomitization models may be applied to the Verknė Fm. and the Pabradė Fm., respectively.

References

Azmy, K., Veizer, J., Bassett, M. G. & Copper, P. 1998. Oxygen and carbon isotopic composition of Silurian brachiopods: implications for coeval seawater and glaciations. Geological Society of America, Bulletin, 110, 1499–1512.
doi:10.1130/0016-7606(1998)110<1499:OACICO>2.3.CO;2

Bustillo, M. A., Garcia-Guinea, J., Martinez-Frias, J. & Delgado, A. 1999. Unusual sedimentary geodes filled by gold-bearing hematite laths. Geological Magazine, 136, 671–679.
doi:10.1017/S0016756899003404

Flügel, E. 2004. Microfacies of Carbonate Rocks. Analysis, Interpretation and Application. Springer-Verlag, Berlin, 976 pp.

Folk, R. L. & Land, L. S. 1975. Mg/Ca ratio and salinity, two controls over crystallization of dolomite. Bulletin of American Association of Petroleum Geologists, 59, 60–68.

Kaljo, D., Kiipli, T. & Martma, T. 1997. Carbon isotope event markers through the Wenlock–Pridoli sequence in Ohesaare (Estonia) and Priekule (Latvia). Palaeogeography, Palaeoclimatology, Palaeoecology, 132, 211–224.
doi:10.1016/S0031-0182(97)00065-5

Kaljo, D., Grytsenko, V., Martma, T. & Mõtus, M.-A. 2007. Three global carbon isotope shifts in the Silurian of Podolia (Ukraine): stratigraphical implications. Estonian Journal of Earth Sciences, 56, 205–220.
doi:10.3176/earth.2007.02

Kaminskas, D. 2002. Geochemistry of Wenlock (Silurian) Rocks of Lithuania. Doctoral dissertation, Vilnius University, Vilnius, 145 pp.

Land, L. S. 1980. The isotopic and trace element geochemistry of dolomite: the state of the art. In Concepts and Models of Dolomitization (Zenger, D. H., Dunham, J. B. & Ethington, R. L., eds), Society of Economic Paleontologists and Mineralogists, Special Publication, 28, 87–110.

Lapinskas, P. 2000. Structure and Petroliferosity of the Silurian in Lithuania. Institute of Geology, Vilnius, 203 pp.

Lazauskiene, J., Sliaupa, S., Brazauskas, A. & Musteikis, P. 2003. Sequence stratigraphy of the Baltic Silurian succession: tectonic control on the foreland infill. Journal of the Geological Society, London, Special Publications, 208, 95–115.

Lumsden, D. N. 1979. Discrepancy between thin section and X-ray estimates of dolomite non-stoichiometry and carbonate facies parameters. Journal of Sedimentary Petrology, 48, 429–436.

Lumsden, D. N. & Chimahusky, J. S. 1980. Relationship between dolomite nonstoichiometry and carbonate facies parameters. SEPM Special Publication, 28, 123–137.

Machel, H. G. 2004. Concepts and models of dolomitization: a critical reappraisal. Journal of Geological Society, London, Special Publications, 235, 7–63.

Martma, T., Brazauskas, A., Kaljo, D., Kaminskas, D. & Musteikis, P. 2005. The Wenlock–Ludlow carbon isotope trend in the Vidukle core, Lithuania, and its relations with oceanic events. Geological Quarterly, 49, 223–234.

Paškevičius, J. 1997. The Geology of the Baltic Republics. Geological Survey of Lithuania, Vilnius, 387 pp.

Scholle, P. A. & Ulmer-Scholle, D. S. 2003. A Color Guide to the Petrography of Carbonate Rocks: Grains, Textures, Porosity, Diagenesis. AAPG Memoir 77, 459 pp.

Stentoft, N., Lapinskas, P., Musteikis, P. & Kristensen, L. 2001. Diagenesis of the Silurian Oil Reservoir Rock from the Kudirka Atoll in Lithuania. Geological Survey of Denmark and Greenland and Ministry of Environment and Energy Report 74, 29 pp.

Tucker, M. (ed.). 1995. Techniques in Sedimentology. Blackwell Science, 394 pp.

Tucker, M. & Wright, P. 1999. Carbonate Sedimentology. Blackwell Science, 482 pp.

Veizer, J., Ala, D., Azmy, K., Bruckschen, P., Buhl, D., Bruhn, F., Carden, G. A. F., Diener, A., Ebneth, S., Godderis, Y., Jasper, T., Korte, G., Pawellek, K., Podlaha, O. G. & Stauss, H. 1999. ⁸⁷Sr/⁸⁶Sr, δ¹³C and δ¹⁸O evolution of Phanerozoic seawater. Chemical Geology, 161, 59–88.
doi:10.1016/S0009-2541(99)00081-9

Warren, J. K. 1999. Evaporites – Their Evolution and Economics. Blackwell Science, London, 438 pp.

Warren, J. K. 2006. Evaporites: Sediments, Resources and Hydrocarbons. Springer, Berlin, 1035 pp.
doi:10.1007/3-540-32344-9

Back to Issue