Document Type : Original Research Paper
Author
Department of Geology, Faculty of Sciences, Shahid Bahonar University of Kerman
Abstract
The Badamu Formation with Middle-Upper Jurassic (late Toarcian-Early Bajocian) age introduced as third formation of Shemshak Group in the Central Iran that for facies studies and depositional environment, the Bolbolueih section in SE Kerman with thickness 144m were selected and sampled. Facies analyses of Badamu Formation led to identification of 16 lithofacies that classified into four facies associations including carbonate, siliciclastic, hetrolitic carbonate-siliciclastic and oolithic ironstone. The important facies of the Badamu Formation in studied section is oolitic calcarenaite facies (La) that according to textural and structural features classified into six lithofacies (Lah, Lal, Lap, Lam, Lar and Lat). The sorted ooides in grainstone microfacies accompanied by structural evidences such as cross-bedding with bimodal to bipolar palaeocurents, hummocky and herringbone cross-beds, reactivation surfaces, wavy ripple marks and rain drop imprints reveal that this facies were deposited in shallow beach environment. Textural and structural characterizes in the associated facies (sandstone and hetrolitic fasies) such as high textural and compositional maturity and flaser bedding is consistent with this interpretation. Vertical and lateral accretions of the recognized facies show that the Badamu Formation successions have been deposited in shoreface subenvironment in the beach and beach ridges model framework.
Keywords
Main Subjects
References
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