Records of the Geological Survey of India, Volume 117, Part 2The Survey, 1986 - 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 67
... grained ) Matatila Kerato- phyre Kakarwao Dolerite ( coarse grained ) Jajarwara Felsite ( Sporadic hydrothermal activity localised near quartz ' reefs ' - formation of pyrophyllite & alaspore ) . Quartz vein , pegmatite ( restricted ...
... grained ) Matatila Kerato- phyre Kakarwao Dolerite ( coarse grained ) Jajarwara Felsite ( Sporadic hydrothermal activity localised near quartz ' reefs ' - formation of pyrophyllite & alaspore ) . Quartz vein , pegmatite ( restricted ...
Page 80
... coarse grained granite . In this connection it may be important to note the findings of Bateman and Wahrhalting ... ( coarse , medium and fine grain size ) , b ) the colour ( pink or grey ) of the dominant feldspar and c ) presence or ...
... coarse grained granite . In this connection it may be important to note the findings of Bateman and Wahrhalting ... ( coarse , medium and fine grain size ) , b ) the colour ( pink or grey ) of the dominant feldspar and c ) presence or ...
Page 81
... coarse grained ground- mass , there are finer grained areas which are usually the loci of biotite concentration . Pegmatoid texture has been noted in this granite around the margins of some of the granitised basic enclaves ...
... coarse grained ground- mass , there are finer grained areas which are usually the loci of biotite concentration . Pegmatoid texture has been noted in this granite around the margins of some of the granitised basic enclaves ...
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Common terms and phrases
albite amphibolite amphibolite facies aureole Babina banded iron-formation Basu Batholith Berwar Bijawar biotite bodies Bundelkhand Bundelkhand granitic massif Bundelkhand massif chlorite composition conglomerate country rocks crystals developed dips dolerite dykes emplacement enclaves esmeraldite exhibit feature feldspar folds foliation formation garnet Geol GEOLOGICAL SURVEY gneisses Gneissic Complex grade grained granite granite granitic rocks granitoid groundmass H₂O hornblende inclusions INDIA Records indicate intrusive Jhansi granite Jhararghat K-feldspar Kabrai Karesra Karitoran lamellae leucogranite magmatic magnetite Mahroni mapped Mau Ranipur megacrysts metabasic metamorphism microcline migmatites minerals muscovite Mylliem Mylliem Pluton myrmekite occur outcrops parallel pegmatite perthite phenocrysts plagioclase pluton porphyritic porphyritic coarse grained porphyritic granites Precambrian pyrophyllite quartz quartz reefs quartz-sericite rock quartzites recrystallization relict samples schist schistose sedimentary sediments sericite shear Shillong Group Shillong rocks Shillong Series South Khasi Batholith sphene strike structural suggest SURVEY OF INDIA syenitic textural trending twins upto veins xenoliths zone