Records of the Geological Survey of India, Volume 127, Part 4The Survey, 1995 - 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 65
... excavated through a weak tectonised zone comprising Main Boundary Fault and pulverised Gondwanas , experienced very poor tunnelling conditions with emanation of methane gas resulting in serious explosions which have hampered the ...
... excavated through a weak tectonised zone comprising Main Boundary Fault and pulverised Gondwanas , experienced very poor tunnelling conditions with emanation of methane gas resulting in serious explosions which have hampered the ...
Page 71
... excavated depth of 19m . The bedrock strike is NE - SW with 40 ° to 45 ° SE dip . The MEQ studies carried out by Roorkee University during 1991-92 have identified the presence of weak feature near Burpi - Thanlon area , about 18 - 22 km ...
... excavated depth of 19m . The bedrock strike is NE - SW with 40 ° to 45 ° SE dip . The MEQ studies carried out by Roorkee University during 1991-92 have identified the presence of weak feature near Burpi - Thanlon area , about 18 - 22 km ...
Page 82
... excavated on the left abutment has indicated fresh rock at a depth of 4m thus indicating the possible stripping limit of 4m on the left abut- ment . Borehole BH - 1 drilled at the centre of river has not en- countered bed rock even upto ...
... excavated on the left abutment has indicated fresh rock at a depth of 4m thus indicating the possible stripping limit of 4m on the left abut- ment . Borehole BH - 1 drilled at the centre of river has not en- countered bed rock even upto ...
Contents
AssamMeghalaya TripuraMizoram and ManipurNagaland | 3 |
Geological Mapping TripuraMizoram | 23 |
Geological Mapping ManipurNagaland | 29 |
Copyright | |
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Abor volcanics abutment Aizawl alignment amphibolite anomaly anticlines arenaceous argillaceous ARUNACHAL PRADESH Assam axial bands Barail Group bed rock Bhuban Formation block Bokabil bore holes boreholes Brahmaputra Buxa Formation Chandel districts channel chromite clay dam axis deposits depth Disang dolomite drilling East Siang East Siang district Engineering Geology excavated exposed faults field season fold geochemical geomorphological geotechnical gneiss grey Group of rocks harzburgite hill indicated investigation Jorhat limestone lithological lithounits located LUNGLEI DISTRICTS Manipur medium grained Meghalaya mineral mineralisation MIZORAM NAGALAND nala NE-SW Noa Dihing occur Older Alluvial Plain ophiolite pelagic sediments Phyllite power house Precambrian Project proposed quartz quartzite Quaternary regional right bank river Samchampi samples sandstone schist sequence shale shear Shergaon Shillong Shillong Group silt siltstone slope sq.km structures studies sulphides surface Surma Group synclines systematic geological mapping terrace Tertiary thick Tipam traverses Tripura tunnel ultramafic Umpyrtha area unconformably upto veins Yinkiong zone