1994-95 - Birbal Sahni Institute of Palaeobotany

1994-95
To recognise biozones having sTraTigraphical significance
To demarcaTe time boundaries
boundary
wiTh special reference to PlTr
To decipher the naTure and significance of evolwion of various
palynofloras
Palynological study 0[24 samples [rom Satrajpalli area (bore-hole GSP-9) reveals
the presence of Barakar palynoflora at 114.00 to 167.00 m depth characterised by the dominance
o[ Schellringipollenites while Lower Raniganj palynoflora at 85.04 to 108.80 m is
represented by the domi nance o[ striate bisaccate, chiefly Fallnipollenites and
STriatopodocarpites and the presence o[ Falcisporites, CrescenTipollenites, LWIOTisporites,
Wevlandites and Klallsipollenites.
Search, collection and consultation o[ literature [or comparative study o[ Permian­
Triassic palynoflora o[ India and Antarctica arc continued.
Processing and study of samples from bore-holes GLP-6 (38 samples) and GLP-7
(30 samples) of Lakshmidevpet area arc continued. Barakar palynoflora has been observed
at46.60 to 66.40 m depth in bore-hole GLP-7; Karharbari at 617.20 to 491.1 Om and Barakar
at 327.10 m in bore-hole GLP-6.
Restudy of five samples in bore-hole GAM- I0 reveals the presence o[ Talchir
p.llynoflora at 58 I.55 m depth.
Studies on hore-hole cores GBR-l,2,3,6 and 7 from Budharam area have been
linalized. A complete sequence f1"OmTalchir to Kamthi formations (Early Triassic) has heen
recorded in this area and a palynological correlation of these hore-cores has been done.
Suresh C. Srivastava and 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
The maceral, microtithotype and reflectance studies o[ twenty-one coal samples
[rom Koyagudem area have been completed. These coals in general are represented by
vitrinite and fusinite macerals intimately associated with exinite and mineral matter. Cuticles,
sporangia and resins have scanty distribution. Vitrite, ineliite and trimacerite are the
common microlithotypes recorded in these coals. The reflectance study has revealed that
the coals attained refleetance (Ro max. in oil) value ranging [rom 0.57- I. 3 per cent (normal
range 0.57-0.86%), indicating high volatile bituminous C (sub-hituminous A) to high volatile
bituminous A stages in rank. However, in some of the samples a sudden rise in the
reflectance value has been recorded (0.96-to 1.3%) indicating that these coals have reached
high volatile hituminous A to medium volatile bituminous stages. This sudden rise is proh-
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