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
... intrusive plutons . The group has a typical northeasterly structural strike , with open folds grading across strike ... intrusive into the Gneissic Complex , and the Mylliem Pluton , intrusive within the Shillong Group . They may be ...
... intrusive plutons . The group has a typical northeasterly structural strike , with open folds grading across strike ... intrusive into the Gneissic Complex , and the Mylliem Pluton , intrusive within the Shillong Group . They may be ...
Page 50
... intrusive into the Shillong Group . In view of the proven unconformity between the Gneissic Complex and the Shillong Group , and the absence of non - porphyritic granitoids from the latter , the relationship between the Nongpoh the ...
... intrusive into the Shillong Group . In view of the proven unconformity between the Gneissic Complex and the Shillong Group , and the absence of non - porphyritic granitoids from the latter , the relationship between the Nongpoh the ...
Page 98
... intrusive granites as noted away from the lines of shear . It shows that shearing started even before the complete consolidation of the intrusive porphyritic granite magma . • The major shears are occupied by NE - SW trending quartz ...
... intrusive granites as noted away from the lines of shear . It shows that shearing started even before the complete consolidation of the intrusive porphyritic granite magma . • The major shears are occupied by NE - SW trending quartz ...
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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