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- Title
Sequence Stratigraphic Model of Middle Permian Barakar Formation from a Marginal Gondwana Basin, India.
- Authors
Dey, Joyjit; Sen, Souvik
- Abstract
Gondwana deposits are extensively found across the continents. Here we study the Middle Permian Barakar Formation from the marginal Gondwana Basin, eastern India, being deposited in a normal fault setting. Availability of extensive cores as well as geophysical log suites (gamma-resistivity-density from drilled wells) from the study area helped us achieving high resolution interpretation. Core study identifies fluvial sedimentary architectures, which were correlated with the geophysical logs and modeled field-wide to understand vertical and horizontal facies disposition. The facies analysis has been used to establish a sequence stratigraphic model of the cyclic Barakar deposition. Four major fining upward depositional sequences were identified, each sequence comprises of low accommodation system tract (LAST) at base and high accommodation system tract (HAST) at top. LAST is characterized by vertically stacked, multistory amalgamated channel sandstone dominated facies, while floodplain dominated facies characterizes HAST, reflecting a gradual shift from braided to meandering depositional system from bottom to top of each cycle. Study reveals depocenter to be in the western part, supported by eastward thinning of sediment packets, all being deposited in a half-graben setting.
- Subjects
SEQUENCE stratigraphy; PERMIAN Period; FLUVIAL geomorphology; MARINE sediment quality; GONDWANA (Continent)
- Publication
Journal of Earth Science, 2018, Vol 29, Issue 4, p745
- ISSN
1674-487X
- Publication type
Article
- DOI
10.1007/s12583-018-0791-7