Records of the Geological Survey of India, Volume 113, Part 4The Survey, 1984 - 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 24
... dykes and veins . Ijolitic rock , mainly ijolite occurs as small lenses , patches and veins within a circular ring- like zone in pyroxenite - serpentinite . Melteigite - alkali pyroxenite appears to have been formed by replacement of ...
... dykes and veins . Ijolitic rock , mainly ijolite occurs as small lenses , patches and veins within a circular ring- like zone in pyroxenite - serpentinite . Melteigite - alkali pyroxenite appears to have been formed by replacement of ...
Page 25
... dykes , veins and lenses occur within the complex . A swarm of large dykes 5 m wide and 50-150 m long occur south of Mawiong and trend WNW to NW . A few smaller occur along Byrthap - Sung road . In some of the dykes a flow like banding ...
... dykes , veins and lenses occur within the complex . A swarm of large dykes 5 m wide and 50-150 m long occur south of Mawiong and trend WNW to NW . A few smaller occur along Byrthap - Sung road . In some of the dykes a flow like banding ...
Page 26
... dykes defined by a patite - magnetite rich layers ( Plate 3.06 ) . Banding is mostly parallel to the wall of the dykes and dips steeply ( 70 ° -90 ° ) . A secondary shear plane is com- mon within the carbonatites of Maskut area which ...
... dykes defined by a patite - magnetite rich layers ( Plate 3.06 ) . Banding is mostly parallel to the wall of the dykes and dips steeply ( 70 ° -90 ° ) . A secondary shear plane is com- mon within the carbonatites of Maskut area which ...
Contents
GEOLOGICAL SURVEY OF INDIA | 1 |
Problems of correlation of PreGondwana rock units of Arunachal Pradesh and adjoining areasa review | 15 |
The Abor Group of rocks in Arunachal Pradesh | 48 |
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Common terms and phrases
Abor Volcanic Arunachal Pradesh assemblage associated axial bands basement bedrock beds belt biotite bore holes Buxa carbonatite Chattopadhyay chert chromite coal seam coalfields complex correlation Cretaceous crystalline Daling Darjeeling developed Disangs dykes exploration fault folds Formation Gamnom garnierite geochemical Geol Geological Survey GHOSH gneiss goethite Gondwana Grade grains granite Group Himalayas horizon ijolite Khasi limestone lineaments Lohit Lohit district Manipur Manipur East Maskut Meghalaya metamorphic migmatites mineral Mishmi Naga Hills Nagaland Nandy nepheline Ni-content North Eastern occur ophiolite ophiolite suite overburden phase Phokphur Plate postulated pyroxene pyroxenite quartz quartzite Ranga valley reflected refraction regional river rocks samples sandstone schist seam/s sedimentary sediments sequence serpentinite shale Shillong Siang district sillimanite Sirohi soil profile Sonapahar stratigraphic structural studies sub-surface Subansiri district Sung Valley Survey of India tectonic Tertiary thickness thrust Tidding serpentinites tion trending ultramafics Unpublished GSI Report upto veins zone