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 36
... basic plagioclase ( Naha , 1963 ) releasing CaO , FeO , Al , O , and SiO . Pyroxene + basic plagioclase → amphibole + clinozoisite + quartz . As explained earlier , a chemical control must have favoured the development of sphene in ...
... basic plagioclase ( Naha , 1963 ) releasing CaO , FeO , Al , O , and SiO . Pyroxene + basic plagioclase → amphibole + clinozoisite + quartz . As explained earlier , a chemical control must have favoured the development of sphene in ...
Page 110
... basic rocks now represented by talc schist , tremolite - actinolite " plagioclase , micro - perthitic nature of the microline , absence of chilled margins , absence of any sign of post - formation schist etc. formed the earliest ...
... basic rocks now represented by talc schist , tremolite - actinolite " plagioclase , micro - perthitic nature of the microline , absence of chilled margins , absence of any sign of post - formation schist etc. formed the earliest ...
Page 110
... basic and ultrabasic rocks could be visualized . These enclaves , however , do not indicate any belt like development common in many greenstone terrains . The banded iron - formations are chemical deposits and it is probable that the basic ...
... basic and ultrabasic rocks could be visualized . These enclaves , however , do not indicate any belt like development common in many greenstone terrains . The banded iron - formations are chemical deposits and it is probable that the basic ...
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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