Records of the Geological Survey of India, Volume 106The Survey, 1975 - Earthquakes Includes the Annual report of the Geological Survey of India, 1867- |
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Page 56
The chert member , the lowest member of the formation , contains beds of phosphate rock in its upper portion . The recent emphasis on the phosphorite exp'oration , necessitated the detailed study of the chert member in different parts ...
The chert member , the lowest member of the formation , contains beds of phosphate rock in its upper portion . The recent emphasis on the phosphorite exp'oration , necessitated the detailed study of the chert member in different parts ...
Page 58
... Chert member : i ) Chert / Shale ratio ; ii ) Chert + Shale / Phosphate rock ratio ; and iii ) Phosphate rock / Chert + Shale + Phos- phate rock ratio . B. For the Phosphate unit : ( i ) Percentage phosphate ratio = ( Phosphate rock ...
... Chert member : i ) Chert / Shale ratio ; ii ) Chert + Shale / Phosphate rock ratio ; and iii ) Phosphate rock / Chert + Shale + Phos- phate rock ratio . B. For the Phosphate unit : ( i ) Percentage phosphate ratio = ( Phosphate rock ...
Page 193
... chert into microcrys- talline mosaic of equant quartz grains . The crustified veins , formed by the recrystallisation , show micro - comb structure and anastomosing three - dimensional net works . The carbonaceous cherty phyllite is an ...
... chert into microcrys- talline mosaic of equant quartz grains . The crustified veins , formed by the recrystallisation , show micro - comb structure and anastomosing three - dimensional net works . The carbonaceous cherty phyllite is an ...
Contents
AIRBORNE MINERAL SURVEY AND EXPLORATION WING | 87 |
Mineral Investigations | 105 |
Engineering Geology Investigations | 118 |
Copyright | |
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alluvium amphibolite Andhra Pradesh Asstt bands basalt basin bauxite beds Bihar biotite block bore holes boreholes Calcutta carried charnockite chert chert member clay coal Coalfield copper Deccan Trap Delhi deposits depth Director district dolerite dolomite drill holes dykes east electrical logging exploratory fault felspar folds foliation formation fossils garnetiferous geochemical geological mapping Geological Survey Geologist Geologists Jr geophysical glacier gneiss Gondwana grade grained granite gneiss grey Groundwater Himalaya hornblende indicated investigation Jaipur laterite limestone Lucknow metres mica million tonnes mineralisation minerals moraine nala occur pegmatite phosphate phyllite plagioclase Pradesh Project quartz quartz veins quartzite Rajasthan Region river rock types S/Shri samples sand sandstone scale schist seams sediments shales Sharma Shri Singh Sinha snout Srivastava strike length studies Survey of India syncline thickness thin toposheet Trap Flow trending tunnel upto valley varies Vindhyan دو دو وو