Records of the Geological Survey of IndiaThe Survey, 1986 - Earthquakes Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals. |
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Page 37
... slopes are the most favourable locales for the concentration of sillimanite and corrundum float boulders . Introduction Sillimanite occurrence in Sonapahar area was first repor- ted by F.R. Mallet in 1879. Until the introduction of ...
... slopes are the most favourable locales for the concentration of sillimanite and corrundum float boulders . Introduction Sillimanite occurrence in Sonapahar area was first repor- ted by F.R. Mallet in 1879. Until the introduction of ...
Page 41
... slopes . In the case of steep and very steep slopes , almost the entire float rolls down the hill flank and is carried into the stream . The direction of the slope plays a crucial role in the dispersal and concentration of the float ...
... slopes . In the case of steep and very steep slopes , almost the entire float rolls down the hill flank and is carried into the stream . The direction of the slope plays a crucial role in the dispersal and concentration of the float ...
Page 55
... slopes of the Dalbuing hill as one approaches from the suspension bridge over the Yamming nala along the foot - track leading to the Dalbuing village , volcanoge- nic sedimentaries with dark grey plant - bearing slaty shale unit are ...
... slopes of the Dalbuing hill as one approaches from the suspension bridge over the Yamming nala along the foot - track leading to the Dalbuing village , volcanoge- nic sedimentaries with dark grey plant - bearing slaty shale unit are ...
Contents
PETROLOGY AND CHEMISTRY OF LEUCOCRATIC ROCKS FROM NAGA | 1 |
BLUE SCHISTS C TYPE ECLOGITES AND GARNET BEARING MAFIC | 7 |
THE NICKELIFEROUS MAGNETITE ASSOCIATED WITH THE NAGA | 15 |
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Abor Volcanics albite amphibolite antiform Arunachal Pradesh assemblage basin blue schists calcite Chattopadhyay cherty chlorite chromite coarse colour column Dalbuing Delai river deposits diamictite Disang Formation East Siang district eclogites Eocene epidote facies feldspar float boulders folding foliation foot hills fossils garnet Geol Geological Survey glaucophane gneiss Gondwana grey greyish Hills ophiolite belt hills/ridges Himalaya hornblende host rock Hunli intercalations Ithun valley limestone Lohit Lower mafic mafic segregations magnetite magnetite body Manipur margin matrix medium grained metamorphism mineral Miri Formation Miri Group Naga Hills Naga Hills ophiolite Nagaland nala NE-SW Nummulitic occur oligomictic conglomerate Olistostromal opaques ophiolite Permian phyllite plagioclase plagiogranite Plate quartz quartzite Radiolaria region samples sandstone schist schist band schistose sedimentaries sediments sequence serpentinites shale shows sillimanite siltstone Singh structure Surv Survey of India tectonic thick thin Tidding trending Ukhrul ultramafics Upper upto veins Vidyadharan white quartzite Yinkiong zone