Ooid-stromatolite association - a stress for benthic ecosystems
https://doi.org/10.32454/0016-7762-2015-3-19-25
Abstract
This study reports the occurrence of ooid-stromatolite association (0,5-9 m in thickness) in the Lower Paleozoic sections of the Timan-northern Ural region. Well-preserved different fabrics seen in ancient ooids and stromatolites have previously been interpreted with respect to paleoenvironmental conditions which brought changes in benthic ecosystems. Results from current study suggest that it is possible that the connection of ooids with stromatolites at the time-levels depends on their genetic relationship due to abundance of microbial inhabits during periods of shallow water marine basin regressions. During regression in the result of further paleolandscape differentiation of the bottom the hydrochemical and hydrodynamic regimes of the water reservoir changed. It lead to the quiet-water environments, expansion of microbe and bacterial associations and eutrophy of waters, calcium balance of sea waters fall and reorganization of benthos ecosystems with dominance of mostly euryfacial and euryhaline organisms - Ostracods, gastropods and bivalves. Bulk carbonate values from the Wenlock limestones with ooids average -5,4...-6,4% for S13C PDB and 22,9...24,6% for S18O SNOW. Additionally, a low content of boron 11-30g/t in these limestones also indicates the lowered salinity of waters.
About the Author
A. I. Antoshkina
Institute of Geology, Komi Science Centre, Ural Branch, Russian Academy of Sciences; Institute of Natural Sciences, Pitirim Sorokin Syktyvkar State University
Russian Federation
Russian Federation
References
1. Антошкина А.И., Шеболкин Д.Н. Генетическая интерпретация ооидных образований (на примере венлокских отложений южной части гр. Чернышева) // Мат. Всероссийского совещания «Геохимия литогенеза». Сыктывкар: Геопринт, 2014. С. 165-168.
2. Герасименко Л.М., Ушатинская Г.Т. Цианобактерии, цианобактериальные сообщества, маты, биопленки // Бактериальная палеонтология. М.: ПИН РАН, 2002. С. 36-46.
3. Палеозойское осадконакопление на внешней зоне шельфа пассивной окраины сверо-востока Европейской платформы / А.И. Антошкина, В.А. Салдин, А.Н. Сандула и др. Сыктывкар: Геопринт, 2011. 200 с.
4. Шеб Д.Н., Манни к П. Венлокские отложения южной части гр. Чернышева (Тимано-Североуральский регион) // Литосфера. 2014. № 1. С. 33-40.
5. Юрьева З.П., Деулин Ю.В., Безносова Т.М., Цы- ганко В.С., Мянник П., Мартма T. Карбонатные секвенции пограничных отложений границы силура-девона в Тимано-Североуральском регионе // Материалы Международного симпозиума «Геология девонской системы». Сыктывкар: Геопринт, 2002. С. 321-324.
6. Davaud E., Girardclos S. Recent freshwater ooids and oncoids from western Lake Geneva (Switzerland): Indications of a common organically mediated origin // Journal Sedimentary Research. 2001. V. 71, No. 3. P. 423-429.
7. Flu gel E. Microfacies of carbonate rocks: analysis, interpretation and application. Berlin: Heidelberg-Springer-Verlag. 2004. 976 p.
8. Geobiology of Stromatolites // J. Paul, G. Arp, J. Reitner. Kalkowsky’s type stromatolites and other microbialites of Lower Saxony. Abstract Volume and Field Guide to Excursions Int. Kalkowsky-Symposium, October 4-11, 2008. Gottingen, 2008. P. 142-144.
9. Heise R. Diagenesis of a Sea Mount oolite from the West Pacific, LEG 20 // Deep Sea Drilling Project. University of California. 1973. P. 363-387.
10. Pacton V., Ariztegui D., Wacey D., Kilburn M.R., Rollion-Bard C. , Farah R., Vascoucelo s C. Going nano: A new step towards understanding the processes governing fresh water ooid formation // Geology, 2012. V. 40, No 6. P. 547-550.
11. Paul J., Peryt T.M., Burne R.V. Kalkowsky’s Stromatolites and Oolites (Lower Buntsandstein, Northern Germany). in: J. Reitner et al. (eds) Stromatolite Geobiology. Lecture Notes in Earth Sciences 131. Heidelberg: Springer-Verlag Berlin, 2011. P. 13-28.
12. Pruss S., Fraiser M., Bottjer D.J. Proliferation of early Triassic wrinkle structures: implication for environmental stress following the end-Permian mass extinction // Geology. 2004. V. 32. P. 461-464.
13. Riding R. The Nature of Stromatolites: 3,500 Million Years of History and a Century of Research. in J. Reitner et al. (eds) Stromatolite Geobiology. Lecture Notes in Earth Sciences 131. Heidelberg: Springer-Verlag Berlin, 2011. P. 29-74.
14. Summons R.E., Bird L.R., Gillespie A.I., Pruss S.B., Roberts M. , Sessions A.L. Lipid biomarkers in ooids from different locations and ages: evidence for a common bacterial flora // Geobiology. 2013. V.11. Is. 5. P. 420-436.
15. Tomas S., Homann M.,Mutti M., Amour F., Christ N., Immenhauser A., Agar S.M., K a b i r i L. Alternation of microbial mounds and ooid shoals (Middle Jurassic, Morocco): Response to paleoenvironmental changes // Sedimentary Geology. 2013. V. 294. P. 68-82.
16. Voigt T., Gaupp R., Rohling H-G. Lake deposits of the Early Triassic Buntsandstein in Central Germany: Type localities of oolites and stromatolites // Proccegings of the 5th Int. Limnogeological Congress. Constanza, 2011.P. 191-211.
Review
For citations:
Antoshkina A.I. Ooid-stromatolite association - a stress for benthic ecosystems. Proceedings of higher educational establishments. Geology and Exploration. 2015;(3):19-25. (In Russ.) https://doi.org/10.32454/0016-7762-2015-3-19-25
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