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Book Chapter

The stratigraphic, sedimentological and structural evolution of the southern margin of the Kazakhstan continent in the Tien Shan Range during the Devonian to Permian

By
Dmitriy V. Alexeiev
Dmitriy V. Alexeiev
Geological Institute, Russian Academy of Sciences, Pyzhevskiy 7, Moscow 119017, Russia
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Harry E. Cook
Harry E. Cook
Carbonate Geology LLC, 640 Marlin Court, Redwood City, California 94065, USAUSGS Emeritus, Menlo Park, California, 94025, USA
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Alexandra V. Djenchuraeva
Alexandra V. Djenchuraeva
KMEGEI, Ministry of Natural Resources, Erkindyk 2, Bishkek 720300, Kyrgyzstan
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Alexander V. Mikolaichuk
Alexander V. Mikolaichuk
Institute of Geology, National Academy of Sciences, Erkindyk 30, Bishkek 720481, Kyrgyzstan
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Published:
January 01, 2017

Abstract

The passive margin carbonate platform in the Middle Tien Shan rests on Givetian–Frasnian red siliciclastic strata. It evolved from an attached carbonate platform in the Famennian and early Tournaisian to an isolated carbonate platform in the late Tournaisian to early Bashkirian. The open-ocean side of the platform was reef-rimmed, whereas the continental side was both reef- and shoal-rimmed. Platform interiors exhibit low-energy facies during the Famennian to early Visean and high-energy facies during the late Visean to Bashkirian. Eustatic sea-level rises in the middle Tournaisian, early Visean and near the Visean and Serpukhovian boundary caused major reorganizations in platform architecture.

Deformation in the middle Bashkirian reflects the onset of a convergent margin. Flexural loading by an orogenic thrust wedge controlled basin subsidence along the southern edge of the Middle Tien Shan in the Late Pennsylvanian to Asselian. Cessation of deposition in the Asselian followed by folding and granitoid plutonism reflects the onset of a rigid collision.

Devonian to Permian carbonates represent outcrop analogues of coeval oil- and gas-rich carbonate platforms in the North Caspian basin and can be used for comparative and predictive sedimentological studies. Palaeozoic carbonate reservoir facies may host subsurface Cenozoic oil fields in the Fergana Basin.

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Geological Society

Geological Evolution of Central Asian Basins and the Western Tien Shan Range

M.-F Brunet
M.-F Brunet
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T. McCann
T. McCann
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E. R. Sobel
E. R. Sobel
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Geological Society of London
Volume
427
ISBN electronic:
9781862399594
Publication date:
January 01, 2017

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