We provide a synthesis of stratigraphic data to unravel the history of the geological evolution of South Crimea in the Mesozoic and Cenozoic. The South Crimea Orogen consists of three major mega-sequences: (1) the Triassic–Early Jurassic; (2) the Aalenian–Bathonian; and (3) the Callovian–Eocene. The Late Triassic–Early Jurassic deposits formed in the environment of a forearc basin and a remnant basin. The Aalenian–Bathonian deposits formed above subduction extension and a volcanic belt. Three main Callovian–Eocene tectonic units can be identified in South Crimea: (1) the South Crimean Shelf Basin; (2) the Sudak Deepwater Trough; and (3) the Alchak–Kaya Shelf Basin at the northern margin of the Shatsky Ridge. The Oligocene–Quaternary deposits are considered to be syn-orogenic. A description of the anticipated stratigraphic units on the Shatsky Ridge is suggested for the Middle Jurassic, Callovian–Late Jurassic, Neocomian, Aptian–Albian, Late Cretaceous–Paleocene, Eocene and Maykopian. We propose a model for the geological history of the Eastern Black Sea Basin. Graben formed during the Late Barremian–Albian at the location of the future Eastern Black Sea Basin and a phase of volcanism occurred in the Albian. The main phase of rifting and spreading of oceanic crust took place during Cenomanian–Santonian time.Supplementary material: A Google Earth kmz file of the location of the outcrops and sections is available at http://www.geolsoc.org.uk/SUP18850
The potential for long term growth of the EP sector within Sabah is heavily dependent on the successful exploration and development of the deep water MiddlelLate Miocene-Pliocene turbidite play offshore West Sabah. With the top ranking prospects in this frontier area all lying in water depths in excess of 900 m, a major challenge is to optimise the use of the limited available data in reducing reservoir related risks and developing new play concepts. This requires an understanding of the complex interaction of sedimentary and tectonic processes along this under-explored, active tectonic margin. The application of analogues taken from the "classical" turbidite provinces (e.g. Gulf of Mexico) is not seen as directly applicable. There is an exceptionally large height differential of 7 km, over the relatively short distance of 200 km between the sedimentary hinterland and the base of the continental slope offshore West Sabah. This setting coupled with the intense and continued transpressional tectonic activity along the margin affords a different perspective on deep water sedimentation from the better known passive continental margins. As such new models and concepts are being developed to explain many of the observations noted within the area from both wells and seismic.
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