Depositional Architecture of a Prograding Reef-Rimmed Carbonate Slope, Lower Carboniferous, Bolshoi Karatau Mountains, Kazakhstan

Arnoud Slootman, Marat Ibagarov, Zane Jobe, James Bishop, Amir Umralin, Bas den Brok, Milovan Fustic, Guldana Alimzhanova, Sanzhar Begimbetov, Dias Bekeshov

7 more authors

Alisher Igizgali, Merey Issatay, Maximiliano Miguez, Togzhan Mynbayeva, Dinara Nadirkhanova, Rachel Aisner‐Williams, Alua Zhengis

2025

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DOI 10.2110/sepmscn.058.14

Data confidence 70 medium

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Abstract

Key Messages: (1) Thick carbonate slope-basin deposits associated with an extensive Devonian-Carboniferous carbonate platform are exposed in southern Kazakhstan. (2) Upward-thickening and -coarsening cycles of sediment-gravity flow deposits in the 200 m thick Aktobe River section are attributed to sequence-stratigraphic forcing on the platform and associated shedding of sediment onto the slope. (3) The outcropping facies architecture and stacking patterns are an excellent analog for subsurface reservoirs in the North Caspian Basin of western Kazakhstan.