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Quantitative stratigraphic correlation; ${\chi}^{2}$ test; Early Permian; Barakar Formation; depositional environment.

The cross-association statistical technique is used to correlate major and minor lithofacies and the corresponding facies areas in the widely separated two borehole log profiles of Early Permian succession from the Kaghaznagar and Kothagudem sub-basins of Pranhita–Godavari Graben (PGG) of southeastern India. The one-to-one correspondence of the cross-association of major lithofacies and facies areas is strikingly similar and matches significantly more than expected. It indicates the continuity of single homogenous succession deposited under an identical depositional environment in the widely separated two sub-basins of PGG. However, the dissimilarity between the micro-lithofacies, on the other hand, suggests a different sub-environment through space and time. The significant correlation of major lithofacies and facies areas of the two sub-basins suggests meandering stream depositional facies model of the Early Permian Barakar succession in PGG. It may also provide information regarding the exploration of coal. The dissimilarities of cross-association at the micro-lithofacies level may reflect the differential subsidence through space and time.

Zahid A Khan¹ Ram Chandra Tewari²

1. Directorate of Geology and Mining, Lucknow 226 001, India.
2. Formerly, Department of Geology, Sri Jai Narain P.G. College, Lucknow 226 010, India.

Published

1 February 2019

Manuscript received

9 June 2017

Manuscript revised

18 March 2018

Accepted

9 April 2018

Final version published online

1 January 2019