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Research Paper | Geology | India | Volume 12 Issue 8, August 2023

Petrographic Analysis of Brecciated Iron Deposit (BID) of Bonai-Keonjhar Iron Ore Belt of Odisha, India

Amiyaranjan Parida | Devananda Beura

Abstract: Brecciated iron ore deposit (BID) is well demarcated in the majority stretch of bedded type of iron deposits of Bonai-Keonjhar iron ore belt (BK belt). Khandbandh, Thakurani, Banspani are some of the localities where brecciated iron deposits occurs exclusively or along with Banded Iron Formation (BIF). BID lithounit constitutes fragments of hematite, BHJ and shale of different size and shape cemented by mostly iron rich matrix. BID is syngenetically formed by the random arrangement of clasts generated during the time of sedimentation-lithification of iron formation. Clasts are oriented and cemented by hematite matrix in the buffer area where they are produced by breaking down of banded iron formation at its early stage of deposition. Formation of BID may be due to the localized disturbances in depositional environment facilitating concurrent fragmentation of iron formation with sedimentation. In this paper petrographic analysis of BID are carried out megascopically and microscopically supported by X-ray Diffractometer (XRD).

Keywords: Bonai-Keonjhariron ore belt (BK belt), Brecciated iron ore deposit (BID), Petrography, Odisha

Edition: Volume 12 Issue 8, August 2023,

Pages: 2491 - 2496