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1995-96 - Birbal Sahni Institute of Palaeobotany

1995-96 - Birbal Sahni Institute of Palaeobotany

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BSIP<br />

volatile bituminous A rank.<br />

O.S. Sarate<br />

Programme 2.13<br />

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

Coalfield<br />

Objeclive To assess coal characterisotion in Talcher Coalfield<br />

A detailed biodiagenetic study <strong>of</strong> coals from Bharatpur, South Belanda and Ananta<br />

quarries has indicated that vitrinite group <strong>of</strong> macerals ranges between 13.6 to 76.8'1",<br />

exinite 1.2 to 17.2%, inertinite 9.2 to 60.6% and mineral matter 4.0 to 57.8%. The relatively<br />

higher percentage <strong>of</strong> exinite contents characterizes the South Belal1da and Ananta<br />

coals.<br />

The general distribution pattern <strong>of</strong> macerals suggests the prevalence <strong>of</strong> reducing<br />

conditions. However, oxidizing and transitional phases were also present during the genesis<br />

<strong>of</strong> Talcher coals. Thus, four micropetrographic facies were identified, viz., vitric, fusovitric<br />

and vitro-fusic transitional/intermediate conditions. Study in fluorescence mode<br />

further indicates high incidence <strong>of</strong> Iiptinite group <strong>of</strong> macerals, perhydrous vitrinite and<br />

fluorescing inertinite in selected coals, imparting suitability for liquefaction. The presence <strong>of</strong><br />

pyro-fusinite and degrad<strong>of</strong>usinite is the characteristic feature <strong>of</strong> some coals. Well-preserved<br />

wood structures particularly middle lamella indicate the formation <strong>of</strong> ccrtain fusinites<br />

due to peat fire.<br />

A gcneral megascopic study (45 samples) <strong>of</strong> coals from Kalinga and Gopal Prasad<br />

areas indicates that the coal is rich in thick and persistent durain bands. Viuail1 bands are<br />

much less represented. Further work is in progress.<br />

Anand-Prakash,<br />

Rakesh Saxena & Jyotsana Rai<br />

Programme 2.14 Palynostratigraphy <strong>of</strong> recently explored subsurface Gondwana<br />

sequence in Tamil Nadu and Pondicherry (V.T.)<br />

Objeclive To establish palynological succession in Ihe subsurface<br />

Gondwana sedimenls. their palynodaling and correlation<br />

Samples from bore-hole PBS-l were processed for recovery <strong>of</strong> palyn<strong>of</strong>ossils. Scout<br />

anaJysis <strong>of</strong> palyn<strong>of</strong>lora from yielding samples was done. Important taxa were photographed.<br />

The study is in progress.<br />

R.S. Tiwari, Archana Tripathi & Vijaya<br />

Programme 2.15<br />

Objective<br />

Palynostratigraphy <strong>of</strong> Gondwana sequence in Tatapani­<br />

Ramkola Coalfield, Madhya Pradesh<br />

To develop lilhostratigraphic set up from various surface and<br />

subswjace sequences<br />

To reconstruct slandard palynological succession, age delermina/ion<br />

and correlation wilh special reference 10 coal-bearing<br />

horizons<br />

To recognise range <strong>of</strong>slraligraphically significanl laxa m!d evo-<br />

<strong>96</strong>

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