Abstract
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.
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Acknowledgements
The borehole profiles used in this study were collected during an extensive field study of the area between the years 2006 and 2008. We are thankful to Sri Vassava Chari, the then General Manager (Exploration), Singareni Collieries Company Limited (SCCL), Kothagudem, Andhra Pradesh, for the permission to use these borehole profiles for research. Some of these borehole logs have been used in our earlier study of cyclical characters of Early Permian coal measures of Bellampalli sub-basin (JESS 2009). We are grateful to the reviewers for many useful comments and Associate Editor of the Journal of Earth System Science for critical assessment.
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Khan, Z.A., Tewari, R.C. Lithofacies correlation in Early Permian fluvial Gondwana stratigraphy of southeastern India using cross-association statistics. J Earth Syst Sci 128, 3 (2019). https://doi.org/10.1007/s12040-018-1029-x
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DOI: https://doi.org/10.1007/s12040-018-1029-x