Microfabrics and mineral composition of calcretes and dolocretes from Southeast Bulgaria Микростроеж и минерален състав на калкрети и долокрети от Югоизточна България

The present work is a continuation of complex investigation of calcretes from Southeast Bulgaria (Dimitrov et al., 2010; Koleva-Rekalova et al., 2010; etc.). The studied region is located in the eastern part of the Thracе Depression. The area between the towns of Yambol and Elhovo (Fig. 1) is part of a Neogene basin filled with Pliocene and Quaternary sediments. means of SEM photomicrographs. Quantitative analyses of the Ca and Mg contents were accomplished by scanning electron microscope and electron microprobe “SUPPER PROBE 733” equipped with “ORTEC5000” energy dispersion and program “SPRINT III”.