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 1
... granitoid rocks , ( iii ) The Shillong Group , ( iv ) The Khasi Greedstone , and ( v ) Porphyritic Granitoid plutons . The Gneissic Complex consists predominantly of two - mica gneisses and amphibolites with cordierite - meso- perthite ...
... granitoid rocks , ( iii ) The Shillong Group , ( iv ) The Khasi Greedstone , and ( v ) Porphyritic Granitoid plutons . The Gneissic Complex consists predominantly of two - mica gneisses and amphibolites with cordierite - meso- perthite ...
Page 19
... granitoid material in all scales . This may result from culmination of metamorphism under a variety of geothermal gradients . In order to arrive at an estimate of this parameter it is necessary to have information on the mutual ...
... granitoid material in all scales . This may result from culmination of metamorphism under a variety of geothermal gradients . In order to arrive at an estimate of this parameter it is necessary to have information on the mutual ...
Page 50
... GRANITOID PLUTONS The three porphyritic granitoid plutons described in the preceding pages have a gross similarity in composition , and marked concordance in their settings . Similar por- phyritic granite have been described from other ...
... GRANITOID PLUTONS The three porphyritic granitoid plutons described in the preceding pages have a gross similarity in composition , and marked concordance in their settings . Similar por- phyritic granite have been described from other ...
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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