Records of the Geological Survey of India, Volume 129, Parts 3-4Government of India, 1994 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 146
... carried out , at least three distinct lithological domains hosting gold mineralisation and arranged from south to north , have been identified . These include the domain of Singhbhum group of metasediments ( Siadih- Chatuhasa auriferous ...
... carried out , at least three distinct lithological domains hosting gold mineralisation and arranged from south to north , have been identified . These include the domain of Singhbhum group of metasediments ( Siadih- Chatuhasa auriferous ...
Page 150
... carried out by way of large scale mapping ( 285 sq km on 1 : 25,000 scale ) , detailed mapping ( 0.5 sq km ) on 1 : 1000 scale , bed rock sampling ( 510 nos . ) , pitting / trenching ( 100 Cum ) , stream sediments sampling ( 120 nos ...
... carried out by way of large scale mapping ( 285 sq km on 1 : 25,000 scale ) , detailed mapping ( 0.5 sq km ) on 1 : 1000 scale , bed rock sampling ( 510 nos . ) , pitting / trenching ( 100 Cum ) , stream sediments sampling ( 120 nos ...
Page 79
... carried out three investigations as per field season programme , two in Meghalaya and one in Assam . Geophysical surveys employing SP magnetic and IP ( TD ) methods were carried out over a suggested area in Tyrsat Block , East Khasi ...
... carried out three investigations as per field season programme , two in Meghalaya and one in Assam . Geophysical surveys employing SP magnetic and IP ( TD ) methods were carried out over a suggested area in Tyrsat Block , East Khasi ...
Contents
WEST BENGAL SIKKIM A N ISLANDS | 1 |
Report of investigation for rare metal mineralisation within pegmatite | 7 |
Gold | 14 |
Copyright | |
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Common terms and phrases
acid volcanics amphibolite Andaman anomaly Arunachal Pradesh Assam bands basemetal basin bed rock belt Bihar biotite block boreholes Chhotanagpur clay Code colour comprising conglomerate covered depth Division drilling dykes east eastern Engineering Geology erosion exploration exposed fault feldspar field season fold foliation Formation geochemical GEOLOGICAL MAP geophysical GEOTECHNICAL INVESTIGATION gneiss gneissic gold Gondwana grade granite granite gneiss granitoids grey Group of rocks GSI Rec Hills district identified intrusives Karbi Anglong laterite limestone lineament lithological located medium grained Meghalaya mica schist migmatites mineralisation minerals nala occurs Orissa OVERVIEW pegmatite phyllite plagioclase Proterozoic Purulia district quartz quartz veins quartzite Quaternary Region river sand sandstone scale schist sector sequence shale Shillong Shillong Group Sikkim siltstone Singhbhum slope soil spillway sq km STAGE GEOTECHNICAL INVESTIGATION stream sediment samples structure sulphide Surface SURVEY OF INDIA terrain thick Toposheet trending ultramafic upto West Bengal western