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 4
... Gneissic Complex and is located in the northern fringe of Shillong plateau . The main lithounits of the area are biotite - quartz gneiss to the south of Barigang nala and fine grained granite gneiss to the north . The mineralised zone ...
... Gneissic Complex and is located in the northern fringe of Shillong plateau . The main lithounits of the area are biotite - quartz gneiss to the south of Barigang nala and fine grained granite gneiss to the north . The mineralised zone ...
Page 80
... gneisses which will form fairly good tunnelling media except at stretches where the rock is highly fractured and sheared . Augen gneiss and biotite gneiss are exposed as isolated outcrops around the proposed surge shaft and power house ...
... gneisses which will form fairly good tunnelling media except at stretches where the rock is highly fractured and sheared . Augen gneiss and biotite gneiss are exposed as isolated outcrops around the proposed surge shaft and power house ...
Page 102
... gneiss . quartz - feldspathic gneiss , granitoids and related rocks . The regional strike of the formations , is NE - SW and the general dip is 30 ° to 65 ° towards southeast . The IP surveys employing gradient array ( a = 20m ) have ...
... gneiss . quartz - feldspathic gneiss , granitoids and related rocks . The regional strike of the formations , is NE - SW and the general dip is 30 ° to 65 ° towards southeast . The IP surveys employing gradient array ( a = 20m ) have ...
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