کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4731486 1640412 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fluvial architecture of Early Permian Barakar rocks of Korba Gondwana basin, eastern-central India
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Fluvial architecture of Early Permian Barakar rocks of Korba Gondwana basin, eastern-central India
چکیده انگلیسی

The Early Permian Barakar Formation of the Korba basin represents repeated deposition of fining upward sequences of coarse to medium grained sandstone, fine grained sandstone-shale, shale and coal. The sandstones are channel, sheet like, multistory, and profusely cross-bedded. The shale beds are lens as well sheet like and laminated; coal facies is thin to moderately thick and shows splitting. Paleocurrent analysis suggests a northwesterly paleoslope during Barakar sedimentation. However, the deflection of paleoslope towards northeast in the eastern part of the basin supports the existence of a watershed in the depositional area. The Barakar paleochannel were 4.05 m deep and 176 m wide (single channel) with an average sinuosity of 1.27. The average flow velocity and sediment load during flood stage are in the order of 1.77 m/s and 4.15. These results indicate bed-load (braided) to mixed load nature of the Barakar streams of the Korba basin.The study suggests that the Early Permian braided Barakar streams deposited the coal measure sequence subsequent to deglaciation in a northwesterly slopping paleovalley. The basin floor was highly uneven marked by the presence of a basement high in the northwestern part that bifurcates the paleostreams into northwestern and northeastern branches.


► The study includes lithofacies, paleocurrents and paleohydrology of Early Permian Barakar rocks.
► Northwesterly paleocurrents are in agreement with the paleoslopes in other Gondwana basins of Peninsular India.
► Paleocurrent pattern provides evidence to support watershed in the area and uneven basement topography.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Asian Earth Sciences - Volume 52, 30 June 2012, Pages 43–52
نویسندگان
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