Records of the Geological Survey of India, Volume 107The Survey, 1976 - Earthquakes Includes the Annual report of the Geological Survey of India, 1867- |
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Page 226
... quartz collected . The area is made up of banded magnetic quartzite , chlorite schist and quartz veins of Precambrian age . The quartz veins are 0.5 m to 10 m long and 0.5 cm to 4 cm wide . Old workings have been traced over a distance ...
... quartz collected . The area is made up of banded magnetic quartzite , chlorite schist and quartz veins of Precambrian age . The quartz veins are 0.5 m to 10 m long and 0.5 cm to 4 cm wide . Old workings have been traced over a distance ...
Page 314
... quartz - sericite schist , quartz- mica schist , hornblende schist calc - schist and granite gneiss , all intruded by amphibolite and quartz veins , and are unconformably overlain by the basalt lava flows of the Deccan Trap with ...
... quartz - sericite schist , quartz- mica schist , hornblende schist calc - schist and granite gneiss , all intruded by amphibolite and quartz veins , and are unconformably overlain by the basalt lava flows of the Deccan Trap with ...
Page 42
... quartz veins generally vary in thickness from a few centimetres to a few metres , while the pegmatite veins are ... quartz is so intense that the rocks have been converted into quartz - sericite schist as for example , the quartz ...
... quartz veins generally vary in thickness from a few centimetres to a few metres , while the pegmatite veins are ... quartz is so intense that the rocks have been converted into quartz - sericite schist as for example , the quartz ...
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amphibolite Andhra Pradesh Archaean bands basalt basin bauxite beds Bihar biotite block boreholes carried chalcopyrite chlorite clay Coalfield conglomerate copper cores Deccan Trap Delhi deposits depth Director district Division dolerite drilling epidote exposed felspar folds formation fossil galena geochemical Geol geological mapping Geological Survey Geologists Jr geophysical Ghosh Glossopteris Glossopteris flora gneiss gneissic complex Gondwana grade grained granite gneiss greenish greenstone belts grey Group hill holes horizon indicated investigation Kashmir Kurnool laterite limestone Lower mapped an area metamorphism mineralisation minerals occur Panjal trap pegmatite phyllite pits Project pyrite quartz quartz veins quartzite Quaternary Rajasthan Raniganj regional river rock types samples sand sandstone Sarvashri scale schist schistose seams sediments shale shear zone Shri Singh Siwalik spillway sq km Srivastava stratigraphic studies sulphide Survey of India thickness traverse trending tunnel unconformity Upper upto valley varies Vindhyan