Records of the Geological Survey of India, Volume 88Government of India, 1958 - 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 54
... pegmatites . The granites , gneisses and schists are cut by a number of pegmatitic veins and by dykes mostly of dolerite . The pegmatites in granites and gneisses are composed only of quartz and felspar , but those in schists contain ...
... pegmatites . The granites , gneisses and schists are cut by a number of pegmatitic veins and by dykes mostly of dolerite . The pegmatites in granites and gneisses are composed only of quartz and felspar , but those in schists contain ...
Page 80
... pegmatites with well differentiated quartz and feldspar zones . Most of the pegmatites occurring in the above mentioned localities yield small quantities of beryl intermittently during the course of mica mining . How- ever , the pegmatites ...
... pegmatites with well differentiated quartz and feldspar zones . Most of the pegmatites occurring in the above mentioned localities yield small quantities of beryl intermittently during the course of mica mining . How- ever , the pegmatites ...
Page 133
... pegmatites of the following areas be further prospected : -Kharkuta ( 24 ° 26′30 ′′ : 85 ° 09 ′ ) , Partango ( 24 ... pegmatites in the Simdega Sub - division ( sheets 73 B / 2 and B / 6 ) . On account of small size of books , he does ...
... pegmatites of the following areas be further prospected : -Kharkuta ( 24 ° 26′30 ′′ : 85 ° 09 ′ ) , Partango ( 24 ... pegmatites in the Simdega Sub - division ( sheets 73 B / 2 and B / 6 ) . On account of small size of books , he does ...
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Common terms and phrases
alignment alluvium appears Assistant associated average bands bank beds Bihar carried cent Circle clay coal consist contain continued covered deposits depth detailed developed direction district dolerite drilling dykes east eastern examined exposed extending fault feet ferruginous field folded formations fossils further Garhwal geological Geologist gneisses Gondwana granite grey ground half hard hill inches included India indicate intrusive jointed lignite limestone localities located Lower Madhya mapped material Messrs metall mica mineral mining nala occur pegmatites phyllites pits places portion Pradesh present production quantity quarries quartz quartzites range recorded region reports reserves ridges river road rocks samples sand sandstones schists seam seen shales sheet slope soil square miles stage strike suitable surface Survey thick tion tons trap trend types Upper valley varying veins village western yield zone