Givetian carbonate microfacies from the Totleben-2 well (Moesian Platform, central North Bulgaria)

Pages: 
pp. 21-31
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 24, 1113 Sofia, Bulgaria
Abstract: 

Seven carbonate microfacies types (MFT 1–7) have been distinguished and described in the Givetian dolomite formation from the Totleben-2 well (Moesian Platform, central North Bulgaria). They have been grouped in three microfacies associations: 1) shallow subtidal microfacies with open circulation (MFT 1, coral-stromatoporoid floatstone/rudstone; and MFT 2, brachiopod floatstone/rudstone); 2) protected shallow subtidal microfacies (MFT 3, intraclastic-ooidal packstone/grainstone; MFT 4, palaeosiphonoclad wackestone/packstone; and MFT 5, bioclastic-peloidal packstone/grainstone); 3) intertidal-supratidal microfacies (MFT 6, fenestral microbial bindstone; and MFT 7, mudstone to packstone with Palaeomicrocodium). These microfacies have been interpreted as formed in dominantly shallow subtidal lagoon setting with open to moderate circulation and locally developed intertidal/supratidal environments. Most microfacies are comparable with Wilson’s (1975) Standard Microfacies Types (SMFT) and/or with Givetian microfacies described from the eastern part of the Moesian Platform, as well as with other shallow-marine Devonian successions from Europe.

Keywords: 

microfacies, depositional settings, Devonian, Moesian Platform, Bulgaria

DOI: 
10.52321/GeolBalc.45.0.21