1995-96 - Birbal Sahni Institute of Palaeobotany
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1995-96 - Birbal Sahni Institute of Palaeobotany

1995-96 - Birbal Sahni Institute of Palaeobotany 1995-96 - Birbal Sahni Institute of Palaeobotany

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BSIP of complete fossil tree trunk specimens for Institute's Museum. Samples representing Dubrajpur scdiments from Lakhrapheia Pahar and Intertrappean beds from Nipania were collectcd for palynological studies. Archana Tripathi Programme 2.9 Objective Programme 2.10 Objective Organic petrographic evaluation of Permian coal seams from Rajmahal Basin, Bihar To assess the quality of coals for suitability in various industrial and domestic purposes with emphasis on coking and blending potentiality Qualitative and quantitative estimation of coal macerals under blue light excitation (f1uorcscence mode) have been made on 44 particulate pellets from bore-hole HRC­ CM/109 of Hura Basin. The relatively hydrogen-rich liptinite macerals show a manifold increase and comprise chiefly sporinite, alginite and liptodetrinite. Sporinite showed wide range of preservational stages from well-preserved to highly degraded and fragmented. Alginite is represented mainly by a layered algae- lamalginite. High concentration of hydrogcn-rich microconstituents (Iiptinite and fluorescing or perhydrous vitrinite) in these subbituminous A to high volatile bituminous C coals render them amenable for hydrogenation. Various compositional models, utilizing biopetrological data of coals from Chuperbhita (Bore-hole RCH-3) and Hura (Bore-holes HRC/CM-107 & 109) coalfields, have been prepared for assessing the coal types and conditions of deposition of seams. On thc basis of coal types, presence of well-preserved cutinites (cuticles), macrosporinite (megaspore) and seeds it appears that the coal seams originated dominantly from woody hypoautochthonous to autochthonous ve~etation. It also indicates rapid seasonal fluctuations and aerobic (dry-oxic-inertinite-rich) to anaerobic (wet-reducing-vitrinite-rich) conditions. B.D. Singh & B.K. Misra Palynology ofthe Gondwana Sequence in Satpura Basin To study palynostratigraphy, biozonation, palaeoecology, palaeoenvironment, correlation of various strata in the central part of the basin Palynological studies of Almod beds have been carried out. The significant palynomorphs in the assemblage are: Striatopodocarpites, Faunipollenites, Satsangisaccites, Falcisporites, Klausipollenites, Scheuringipollenites, Densipolleniles, Crescentipollenites, Gullulapol/enites, Corisacciles, Lunatisporiles, Playfordiaspora, Lundbladispora, etc. This palynoassemblage contains Late Permian and Early Triassic palynomorphs. Palynoassemblage from Tarnia Ghat Road section contains Late Permian (Bijori Formation) palynoassemblage having the dominance of Striatopodocarpites, Crescentipolleniles, Distriatites, Corisaccites, Gullulapolleniles and Playfordiaspora and Early Triassic (Pachmarhi Formation) palynoassemblage contains Falcisporites, Satsangisaccites, palynomorphs as Nidipollenites, Goubinispora Trochosporites, 94

1995-96 Weylandites, Playfordiaspora, Lundbladispora, etc. are eithcr as common or poorly distributed. Pramod Kumar Programme Objective 2.tI PalynoOora! patterns and boundary demarcations in Gondwana sequence of Godavari Graben To standardise palynojlorafrom sequence dijJerentj(Jrmations of Gondwana To recognise biozones having stratigraphical significance To demarcate time boundaries wuh special reference to P'Tr boundary To decipher the nature and significance of evolution 0/ various palynojloras Palynological study of samples from bore-hole MKD-25 of Kothagudem area has revealed the occurrence of Barakar palynozone at 476-478 m having Scheurmglpollenites as dominant taxa and striate disaccates, chiefly Faunipollenites and Striatopodocarpites, as subdominant taxa. Raniganj palynoflora have been marked at 276-320 m having dominance of striate disaecates chiefly Striatopodocarpites and Faunipollenites and presence of some significant Late Permian taxa Lunatisporites, GUffulapollenites, Corisaccites, Weylandites, Chordasporites and Falcisporites in low percentage. Occurrence of Talch.ir and Upper Karharbari palynoflora has been demarcated at 248-249 m and 179 m respectively in bore-hole SGM II from Gajulagudem area while Barakar palynoflora has been marked at 19j .27-209 m i.tl PC-38 from Punukulchilka area. Suresh C. Srivastava & Neerja Jha Programme 2.12 Objective Organic petrographic evaluation of coals from Godavari Graben To assess the rank and quality of coal from Mailaram and other areas Completed the maceral, microlithotype and reflectance study of 24 coal samples of Khairagura area of Belampalli Coalfield. These coals are rich i.ovitrinite but differ from the Ramagundam and Mulug coals in having comparatively higher percentage of mineral matter. Resins and pyrite framboids have scanty distribution. The reflectance study has revealed that the max.imum reflectance value i.ooil ranges between 0.48-0.57%. Thus the coals have atta.ined sub-bituminous B to high volatile bituminous C rank. The preliminary fluorescence study has indicated the presence of seeds, sporangia, cuticles, spore masses and algal elements. Carried out reflectance analysis of36 coal samples representing Manuguru area. The study has revealed that these coals contain reflectance value ranging between 0.57­ 0.83%. which i.odicates that these coals have attained high volatile bituminous C to high 95

BSIP<br />

<strong>of</strong> complete fossil tree trunk specimens for <strong>Institute</strong>'s Museum. Samples representing<br />

Dubrajpur scdiments from Lakhrapheia Pahar and Intertrappean beds from Nipania were<br />

collectcd for palynological studies.<br />

Archana Tripathi<br />

Programme 2.9<br />

Objective<br />

Programme 2.10<br />

Objective<br />

Organic petrographic evaluation <strong>of</strong> Permian coal seams from<br />

Rajmahal Basin, Bihar<br />

To assess the quality <strong>of</strong> coals for suitability in various industrial<br />

and domestic purposes with emphasis on coking and blending<br />

potentiality<br />

Qualitative and quantitative estimation <strong>of</strong> coal macerals under blue light excitation<br />

(f1uorcscence mode) have been made on 44 particulate pellets from bore-hole HRC­<br />

CM/109 <strong>of</strong> Hura Basin. The relatively hydrogen-rich liptinite macerals show a manifold<br />

increase and comprise chiefly sporinite, alginite and liptodetrinite. Sporinite showed wide<br />

range <strong>of</strong> preservational stages from well-preserved to highly degraded and fragmented.<br />

Alginite is represented mainly by a layered algae- lamalginite. High concentration <strong>of</strong> hydrogcn-rich<br />

microconstituents (Iiptinite and fluorescing or perhydrous vitrinite) in these subbituminous<br />

A to high volatile bituminous C coals render them amenable for hydrogenation.<br />

Various compositional models, utilizing biopetrological data <strong>of</strong> coals from<br />

Chuperbhita (Bore-hole RCH-3) and Hura (Bore-holes HRC/CM-107 & 109) coalfields,<br />

have been prepared for assessing the coal types and conditions <strong>of</strong> deposition <strong>of</strong> seams. On<br />

thc basis <strong>of</strong> coal types, presence <strong>of</strong> well-preserved cutinites (cuticles), macrosporinite (megaspore)<br />

and seeds it appears that the coal seams originated dominantly from woody hypoautochthonous<br />

to autochthonous ve~etation. It also indicates rapid seasonal fluctuations<br />

and aerobic (dry-oxic-inertinite-rich) to anaerobic (wet-reducing-vitrinite-rich) conditions.<br />

B.D. Singh & B.K. Misra<br />

Palynology <strong>of</strong>the Gondwana Sequence in Satpura Basin<br />

To study palynostratigraphy, biozonation, palaeoecology,<br />

palaeoenvironment, correlation <strong>of</strong> various strata in the central<br />

part <strong>of</strong> the basin<br />

Palynological studies <strong>of</strong> Almod beds have been carried out. The significant<br />

palynomorphs in the assemblage are: Striatopodocarpites, Faunipollenites, Satsangisaccites,<br />

Falcisporites, Klausipollenites, Scheuringipollenites, Densipolleniles, Crescentipollenites,<br />

Gullulapol/enites, Corisacciles, Lunatisporiles, Playfordiaspora, Lundbladispora, etc.<br />

This palynoassemblage contains Late Permian and Early Triassic palynomorphs.<br />

Palynoassemblage from Tarnia Ghat Road section contains Late Permian (Bijori<br />

Formation) palynoassemblage having the dominance <strong>of</strong> Striatopodocarpites,<br />

Crescentipolleniles, Distriatites, Corisaccites, Gullulapolleniles and Playfordiaspora<br />

and Early Triassic (Pachmarhi Formation) palynoassemblage contains Falcisporites,<br />

Satsangisaccites, palynomorphs as Nidipollenites, Goubinispora Trochosporites,<br />

94

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