Kimerek Fm
Type Locality and Naming
Near the Kimerik Plateau, Bukhara-Karshinsky District. V.P. Alekseev, A.V. Troitsky et al., 1990 (52, pp. 34-39). The stratotype is the section of well 4 on the Kimerik Plateau. The Kimerek Fm was identified as unit "zh" or the Kimerik rhythmic suite, and the sandy layers of the Kimerek Fm are identified as the XX industrial horizon. It is included in the Sandjar industrial suite.
Synonym: Kimerek Suite, Кимерекская св.
Lithology and Thickness
The upper part consists of fine-grained rocks - siltstone (aleurolites), carbonaceous argillites with coal layers. On the AR curve, it is distinguished by low values. The thickness is up to 250 m. The total thickness is up to 500 m.
The lower part consists of rhythmic interbedding of claystones, polymictic sandstones, gravels, and coals. The rocks have medium apparent resistivity (AR) values ranging from 10 to 25 Ohm, negative SP anomalies, and low gamma activity, with good reservoir properties, and porosity (KP) reaching 30%. Carbonaceous and clayey sediments are characterized by low AR values (3-4 Ohm). The thickness of the lower part is up to 250 m.
Relationships and Distribution
Lower contact
Underlying deposits are not exposed.
Upper contact
The Kimerek Fm is transgressively overlain by the Gurud Fm.
Regional extent
Pitnyak Uplift (Sultan-Sandjar, Tyuyamuyun), Bukhara-Karshinsky district.
GeoJSON
Fossils
On the Kimerik Plateau, well 4, interval 3230-3400 m, Y.M. Kuzichkina identified Early Jurassic spore and pollen complexes: Cyathidites minor Cauper (2,0), C. hausmannioides Kuz. (6,0), Dictyophyllidites sp. (10), Todisporites minor Couper (0,5), Cyclogranisporites muensterioides Kuz. (1,0), Osmundacidites sp. (0,5), O. jyrassicus (Kara-Murza) (0,5), O. tuberculatus (Klimka) (3,0), O. angrenicus Kuz. (8,0), Verrucosisporites sp. (1,5), Corrugatisporites scanicus Nilsson (1,0), Tripartina variabilis Mal. (4,0), Protocaniferus funarius (Naum.) Bolch. (20,0), Piceapollenites sp. (3,0), Abiespollenites sp. (2,0), Inaperturopollenites sp. (2,5), Classopolis sp. (3,5), Ginkgocycadophytus sp. (5,5), Monosulcites minimus Cauper (21,5). In the Pitnyak Uplift (Sultan-Sandjar and Tyuyamuyun Plateaus) and the lower reaches of the Amu Darya River, a spore and pollen complex - Pinus sp., Separatisacculina sp., Striatopinites sp., Lebochia sp., etc. (458) was identified.