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Petrological and geochemical studies of Tikak Parbat Formation, Barail Group in parts of Belt of Schuppen, Nagaland, Northeast India

Year: 2026

Type: article

Abstract: Petrography and geochemistry of clastic rocks from the Oligocene Tikak Parbat Formation (Barail Group) in the Tiru Valley, located northeastern parts of the Belt of Schuppen, have been investigated to understand their provenance, paleoweathering, and tectonic settings. The Tikak Parbat Formation (TPF) is characterized by alternations of thin to thickly bedded, fine - medium grained, cross - stratified, ripple laminated sandstone, carbonaceous shale and coal seams. The average recalculated modal composition Q 56 F 7 R 37 and geochemical proxies, classified TPF sandstone into two categories as lithic arenite to lithic-wacke. The chemical indices such as chemical index of alteration (CIA), chemical index of weathering (CIW), plagioclase index of alteration (PIA), and ternary diagrams (A–CN–K and (A–K)–C–N) indicated that the TPF sediments has undergone intense weathering under semi-arid to semi-humid climatic conditions. The index of chemical variability (ICV) indicates a high maturity. The results of this study suggest that the TPF sediments were mainly derived from recycled orogenic sources, with minor contributions from mixed and transitional continental and were deposited in a stable continental (passive) margin setting analogous to that of an Atlantic-type continental margin set up.

Source: Discover Geoscience

DOI: 10.1007/s44288-026-00748-3

Authors: K. Chiezou, N. Pandey, Meghali Baruah, Naba Kumar Bori

Institutions: Geological Survey of India, Assam University, North Eastern Hill University

Language: English

Topic: Geochemistry and Elemental Analysis

Subfield: Geochemistry and Petrology

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: diamond

Funders: North-Eastern Hill University, Assam University, Silchar

OpenAlex ID: W7213977015