The type section of the Maikop Group (Oligocene–lower Miocene) at the Belaya River (North Caucasus): Depositional environment and hydrocarbon potential

AAPG Bulletin ◽  
2017 ◽  
Vol 101 (03) ◽  
pp. 289-319 ◽  
Author(s):  
Reinhard F. Sachsenhofer ◽  
Sergey V. Popov ◽  
Mikhail A. Akhmetiev ◽  
Achim Bechtel ◽  
Reinhard Gratzer ◽  
...  
Keyword(s):  
Depositional Environment ◽  
Hydrocarbon Potential ◽  
North Caucasus ◽  
Lower Miocene ◽  
Maikop Group ◽  
Type Section

STRATIGRAPHY, SEDIMENTOLOGY AND GEOCHEMISTRY OF THE OLIGOCENE – LOWER MIOCENE MAIKOP GROUP IN DAGESTAN, NE CAUCASUS

2021 ◽  
Vol 44 (3) ◽  
pp. 385-412 ◽  
Author(s):  
Yu. Gavrilov ◽  
R. Nedumov ◽  
E. Shchepetova ◽  
E. Shcherbinina ◽  
E. Kozlova ◽  
...  
Keyword(s):  
Lower Miocene ◽  
Maikop Group

scholarly journals Lectostratotype of maikopian group – Belaya River section upstream of Maikop town (Western Ciscaucasia) in the Oligocene part

2019 ◽  
Vol 27 (3) ◽  
pp. 70-92
Author(s):  
S. V. Popov ◽  
I. P. Tabachnikova ◽  
A. F. Bannikov ◽  
E. K. Sychevskaya ◽  
T. N. Pinchuk ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Fish Fauna ◽  
Basal Part ◽  
Late Oligocene ◽  
River Section ◽  
Continuous Transition ◽  
Lower Miocene ◽  
Maikop Group ◽  
Normal Polarity ◽  
Western Ciscaucasia

Belaya River Section of Maikop deposits is the closest to the Maikop town, typical for Western and Central Ciscaucasus, well outcropped and studied and should be considered as a type section for the Maikop Group. Here it is possible to observe a continuous transition from the underlying light marls of Belaya Glina Formation to the dark clays of Pshekha Formation at the base of the Maikop succession. Pshekha Fm is characterized by nannoplankton NP21 and NP22 zones, dinocysts Phthanoperidinium amoenum (D13) and Wetzeliella symmetrica zones, mollusk association with Pterolucina batalpashinica at the bottom and rich fish fauna. The succession shows a normal polarity chron C13n for the base of the Pshekha and revers polarity C12r above. Marl of Polbian Bed with brackish Lower Solenovian mollusks, ostracod association with Disopontocipris oligocaenica, nannoplankton of NP23 Zone and dinocysts of Wetzeliella gohtii Zone lies above with erosion contact. Overlying Lower Morozkina Balka Subformation contains from non-calcareous clays and concludes the remains of fish and dinocysts of Wetzeliella gohtii Zone. The Upper Morozkina Balka Subformation contains calcareous sublayers with nannoplankton NP23 Zone in lower part and NP24 one above, dinocysts Chiropteridium partispinatum Zone, Rhombodinium draco Subzone. Polarity pattern we interpret to correspond to C10n, C9r and C9n. Batalpashinsk Formation corresponds to the time of maximum hydrogen sulfide contamination of the Late Oligocene basin and is dated by nannoplankton NP25 Zone, and dinocysts Chiropteridium patrispinatum Zone with Rhombodinium draco Subzone in lower part and Deflandrea spinulosa (non typica) Subzone in the middle and upper parts. Septarian+Zelenchuk Fm is composed of clays with septarian concretions, and interbedded sands with the same dinocysts and foraminifera with Spiroplectammina aff. terekensis. Calcareous interlayers in the top of the formation conclude nannoplankton of NP25-NN1 Zone. Karadzhalga Formation is composed mainly “fish lithofacies” and includes dinocysts zone Labyrinthodinium truncatum (Lower Miocene) in basal part.

DEPOSITIONAL SEQUENCE OF THE WITHNELL FORMATION, DAMPIER SUB-BASIN

1995 ◽  
Vol 35 (1) ◽  
pp. 296
Author(s):  
J. S. Rasidi
Keyword(s):  
Late Cretaceous ◽  
Seismic Data ◽  
Depositional Environment ◽  
Thickness Distribution ◽  
Well Logs ◽  
Hydrocarbon Potential ◽  
Depositional Sequence ◽  
Well Data ◽  
Water Depths ◽  
Reservoir Facies

The Late Cretaceous Withnell Formation has attracted very little exploration attention because of the perception that it has poor hydrocarbon potential. This unfavourable perception has arisen from the fact that very little is known about its depositional environment and lithofacies and therefore, its petroleum prospectivity.A sudden fall of relative sea level occurred at the end of the Santonian, and was followed by the deposition of the siliciclastic Withnell Formation. The occurrence of a number of channels and canyons at the base of the formation, over the old shelf and slope on the southern margin of the sub-basin, supports the hypothesis that the Withnell Formation began as a lowstand systems tract. The thickness distribution of the formation and the progradation direction of seismic packages suggest a southeasterly provenance. Correlation of seismic data and well logs, and rock descriptions demonstrate the presence of units deposited during increasing water depths and subsequent highstand systems tract.Much more information, both seismic and well data, is required to establish the facies distribution within the Withnell Formation which may contain sand-prone lowstand facies such as basinfloor or slope fans. The presence of such reservoir facies would enhance the petroleum prospectivity of the Withnell Formation.

scholarly journals Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)

2018 ◽  
Vol 115 ◽  
pp. 93-112 ◽  
Author(s):  
Achim Bechtel ◽  
Klaus Oberauer ◽  
Aleksandar Kostić ◽  
Reinhard Gratzer ◽  
Vladimir Milisavljević ◽  
...  
Keyword(s):  
Oil Shale ◽  
Depositional Environment ◽  
Lower Miocene
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