1991-92 - Birbal Sahni Institute of Palaeobotany

BSIPThe Auto Scan system for the fission track scanning and track density determinationwas installed in the BHZ microscope. The stage movemcnt, counting oftracks and area scanned are controlled and recorded by the software in the PCattached to the Auto Scan system. The stage stepping and grid stepping softwarescontrolling the stage and programs for F-T age calculation were thoroughlychecked using glauconite and petrified wood samples of known age.The glauconite sandstone samples collected from Jhlawar area were processedfor separation of glauconite grains. Fossil Track density has been determined forsome )f them. Glauconite grains from all the samples have been sent for neutronirradihlion to BARC.Petrified wood samples collected from Deccan Intertrappcan beds have beendated using the Auto Scan System; the F-T ages of petrified woods from differentlocalities near Shahpura in Mandla District, M.P. are Ghughua: 57 ± 8 Ma, Umaria:56 ± 7 Ma, Silt her: 53 ± 9 Ma, Parapani: 54 ± 7 Ma and Mehdwani: 58 ± 8 Ma.AP.SrivastavaProgramme 8.3 ,Potassium-Argon dating of sedimentary andigneous rocksObjective ,To date the glauconitic sandstone from Vindhyandeposits in u.P. and Rajasthan,To date the Deccan Trap samples and synthesizethe data with fossil studies in collaboration withCenozoic Department, To develop data acquisition and reduction systemConsidering the relationship between glauconite maturity and their suitabilityfor dating by K-Ar systematics, a detailed sample preparation and analysis programmehas been initiated. A number of samples (glauconitic) were subjected tomagnetic, heavy liquid and microscopic observation based separation. Tho of thesesamples were subjected to XRD analysis. Thin sections of two Deccan Trap sampleswere prepared. Work on the analyser and control unit and analysis by Anavac werecontinued.C.M.NautiyalPROJECT 9 ,ANNOTATED ATLASES, CATALOGUES,MONOGRAPHS AND BOOKSProgramme 9.1 ,Data bankusinggues,matianExpertatlasesfor Palaeozoic·Mesozoic palynolgy,System and compilation of cataloandother palynological infor-Objective ,To index and update new data into the existingdata banks48, To develop data-base forstratigraphically important taxadistributionof