Records of the Geological Survey of India, Volume 105Geological Survey of India, 1973 - Earthquakes |
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Page 141
... phase has been detected here excepting Mn , O ,, this peak cannot be related to any impurity . The third endothermic peak at 950 ° C is due to the transforma- tion of Mn , O ; phase to hausmannite ( MnO4 ) phase as confirmed by X - ray ...
... phase has been detected here excepting Mn , O ,, this peak cannot be related to any impurity . The third endothermic peak at 950 ° C is due to the transforma- tion of Mn , O ; phase to hausmannite ( MnO4 ) phase as confirmed by X - ray ...
Page 144
... phase manganite ( MnO . OH ) transforms to pyrolusite ( MnO2 ) phase and it ( MnO , ) again transforms to Mn , O , phase at 565 ° C ; the 565 ° C endothermic peak is not due to any impurity as repor ted by earlier worker ( ibid ) . 2 ...
... phase manganite ( MnO . OH ) transforms to pyrolusite ( MnO2 ) phase and it ( MnO , ) again transforms to Mn , O , phase at 565 ° C ; the 565 ° C endothermic peak is not due to any impurity as repor ted by earlier worker ( ibid ) . 2 ...
Page 177
... phase , while in the granitic rocks , on the other hand , Pb is likely to occupy and proxy for K ( effective radius : 1.33 Å ) in the felspar crystal lattice . Obviously , therefore , in the area studied , the chemical potential of Pb ...
... phase , while in the granitic rocks , on the other hand , Pb is likely to occupy and proxy for K ( effective radius : 1.33 Å ) in the felspar crystal lattice . Obviously , therefore , in the area studied , the chemical potential of Pb ...
Contents
CONTENTS | 2 |
The Geology and Mineral Resources of the Andaman | 25 |
Geology of the Coal Measures in the Deccan Trap region | 69 |
Copyright | |
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80 mesh amphibolites analysed Andaman island anorthosites apatite bands Baraganda Baratang Baratang island basaltic basin beds Bihar biotite Bramlette and Riedel calc-granulite calcareous calcite carbonate Carboniferous charnockites chemical clay coal coalfield coalseams conglomerate copper deposition Discoaster district endothermic endothermic peak Eocene estherids fauna felspar figs folds foliation Formation fossil gabbro Gangamopteris garnetiferous geochemical Geol Geological Survey Geologist glacier gneisses Gondwana grained granitic gray anorthosites graywacke hill hornblende indicate khondalites limestone lodes Lower margins metadolerite metal Middle Andaman mineral mineralisation Mussoorie Nala Nicobar occur Orissa orthopyroxene oxides para-amphibolite Permian phenocrysts phosphate phosphorite pinnules plagioclase present pyroxene quartz quartzite rocks samples sandstone sedimentary sediments shales shear shows siltstone snout South Andaman Stradner strike length Surv Survey of India thickness Thinnfeldia tion tonnes trace element ultrabasic upto valley varies veins volcanic younger ortho-amphibolite Zemu glacier zone