Palynology of Permian-Triassic sequence in Iria Nala, Tatapani-Ramkola Coalfield, India

Abstract

The Permian-Triassic sediments exposed along Iria Nala in the northern part of Tatapani-Ramkola Coalfield have been palynologically analysed. The palynological assemblage includes 42 genera and on the basis of quantitative dominance three assemblage zones have been distinguished in ascending order: (i) Densipollenites magnicorpus zone, (ii) Crescentipollenites fuscus zone and (iii) Falcisporites stabilis zone. The first two palynoassemblage zones are restricted to the coal, carbonaceous shale, sandstone sequence (= Raniganj Formation) which is overlain by a khaki shale bed rich in Schizoneura gondwanensis.The lithological succession above this bed contains greyish/khaki green splintery shale and sandstone (=Panchet Formation). These shales have yielded the third palynoassemblage zone marked by Falcisporites stabilis, Playfordiaspora cancellosa and Klausipollenites schaubergeri. The Permian - Triassic boundary lies above the Schizoneura gondwanensis bed between the second and third palynozones. The transition is marked by the decline in the frequency of Crescentipollenites followed with the increase of non-striate group represented by Falcisporites. The onset of Triassic sedimentation is also marked by the presence of khaki shales which closely compares with the Panchet (Lower Triassic) sediments of the type area. Thus, the transition of palynoflora from Late Permian to Early Triassic is gradual and broadly conforms with the lithological changes. There appears to be a continuous sedimentation between the Permian and Triassic periods in this part of Tatapani-Ramkola Basin.

Permian-Triassic palynofloral transition in Sohagpur Coalfield, South Rewa Gondwana Basin, Madhya Pradesh, India

“…and Lunatisporites pellucidus. The present assemblage shows a close affinity with early Triassic palynoflora (Assemblage-A) recorded by Tripathi et al (2005) from borehole SSM-II of Singrauli Coalfield; Assemblage III of Iria Nala Section (Srivastava et al, 1997) and Assemblage VI recorded in borehole TROD-1 of Ramkola-Tatapani Coalfield (Tripathi et al, 2012) due to common occurrence of Klausipollenites schaubergeri, Striatopodocarpites sp., Playfordiaspora cancellosa, Satsangisaccites nidpurensis, Plicatisaccus, Brachysaccus, Minutosaccus, Lundbladispora, Densoisporites, Lunatisporites pellucidus, Goubinispora morondavensis and Chordasporites australiensis. The assemblage shows a close affiliation with the Assemblage IIIB of borehole TP-8, Talcher Coalfield, Orissa (Tripathi, 1996) in dominance of Lundbladispora and nonstriate bisaccate pollen-Klausipollenites schaubergeri, Satsangisaccites nidpurensis along with rare occurrence of trilete Playfordiaspora cancellosa, monosaccate Goubinispora morondavensis and taeniate Lunatisporites pellucidus.…”

Palynology and palaeoenvironment of Late Permian Sawang OCM, East Bokaro Coalfield, Damodar Basin, India

“…The late Permian palynofossils of the present study are well correlated with other Gondwana basins of peninsular India, such as Damodar Basin (Bharadwaj & Tiwari, 1977;Rana & Tiwari, 1980;Singh & Tiwari, 1982;Tiwari & Singh, 1983;Tiwari & Tripathi, 1992;Srikanta Murthy, 2010;Srikanta Murthy et al, 2010;Vijaya, 2011;Vijaya et al, 2012;Srikanta Murthy et al, 2014;2016); Son-Mahanadi Basin (Srivastava et al, 1977;Tiwari & Ram-Awatar, 1989;Tripathi & Bhattacharya, 2001;Srivastava & Kar, 2001;Kar, 2003;Kar & Srivastava, 2003;Ram-Awatar et al, 2004); Satpura Basin (Bharadwaj et al, 1978;Kumar, 1996;Srikanta Murthy et al, 2013); Rajmahal Basin (Tripathi, 1986(Tripathi, , 1989 and Wardha-Godavari basins (Srivastava & Jha, 1988, 1990, 1991, 1992Jha & Srivastava, 1996;Jha et al, 2007Jha et al, , 2014Jha, 2008; in having similar…”

Late Permian palynomorphs from the West Bokaro Coalfield, Damodar Basin, Jharkhand, India

“…The present palynoassemblage compares well with the Palynoassemblage B recovered from an outcrop of the Pali Formation near Dargaon and Salaia Village, Madhya Pradesh (Ram-Awatar, 1987); the assemblage from outcrop samples exposed in the Johilla River (Tiwari & Ram-Awatar, 1987); from sediments exposed in Madalia River section near Patrapara Village in western most region of Talcher Coalfield (Tiwari et al, 1991); Assemblage-1 from Iria Nala in the northern part of Tatapani-Ramkola Coalfield (Srivastava et al, 1997); the assemblage from bore-hole TP-8; Assemblage-2 of borehole TNA-7; Assemblage-1 of borehole TCP-39 and Assemblage-1 of borehole TCP-41 (Tripathi & Bhattacharya, 2001) and bore-holes SMJS-3 and SMBS-1 of Singrauli Coalfield in having an abundance of Densipollenites along with striate bisaccate pollen taxa-Faunipollenites and Striatopodocarpites. The other significant taxa that occur in this palynoassemblage are Crescentipollenites, Guttulapollenites, Weylandites, Arcuatipollenites and Verticipollenites.…”