Geological Bulletin, Volume 14University of Peshawar, 1981 - Geology |
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Page 113
... betafite ( Ca , U ) ( Nb , Ti :) O ( OH ) . Ginsburg et al . , ( 1977 ) plotted the composition of pyrochlore group ... betafite minerals by the following chemical formulae Pyrochlore ( Na , Ca ) , 2 - x Nb20 % ( OHF ) Betafite ( U , Ca ) ...
... betafite ( Ca , U ) ( Nb , Ti :) O ( OH ) . Ginsburg et al . , ( 1977 ) plotted the composition of pyrochlore group ... betafite minerals by the following chemical formulae Pyrochlore ( Na , Ca ) , 2 - x Nb20 % ( OHF ) Betafite ( U , Ca ) ...
Page 119
... betafite and pyrochlore - microlite , and a limited solid solu- tion between microlite and betafite . Ta does not seem to occur in natural betafite in amounts in excess of about 20 % whereas titanian betafite is a member devoid of Nb ...
... betafite and pyrochlore - microlite , and a limited solid solu- tion between microlite and betafite . Ta does not seem to occur in natural betafite in amounts in excess of about 20 % whereas titanian betafite is a member devoid of Nb ...
Page 120
... betafite composition . X - ray powder diffraction data obtained for these radioactive minerals also support a pyrochlore structure with wide departure from the structure of betafite . The disparity between the atomic structure and ...
... betafite composition . X - ray powder diffraction data obtained for these radioactive minerals also support a pyrochlore structure with wide departure from the structure of betafite . The disparity between the atomic structure and ...
Contents
Petrography of the Loe Shilman Carbonatite Complex Khyber Agency | 29 |
Major Elements Abundance in the Kalam Lavas | 45 |
Sections of the Wargal Limestone Western Salt Range Pakistan | 63 |
Copyright | |
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albite albite-carbonate albitites alkaline granites alkaline rocks almandine Amph amphibole andesite apatite associated band beds betafite biotite blueschists brown Bull calc-alkaline calcareous calcite carbonate carbonatite Chaudhry chlorite clinopyroxene complex contain country rocks Desio diorites dolerites dolomite epidote fault feldspar fine-grained Formation gabbroic rocks gabbros Geol Geology gneisses grains granitic belt granitic gneisses granitic rocks granodiorite graphitic schists Himalayas hornblende igneous Indus intrusions island arc Jurassic Kalam volcanic zone Karakoram KASC Kempe and Jan Khyber Agency Kohistan magmatic magnetite Mansehra margin Mauji metamict metamorphism metasediments mica microfacies minerals MODAL COMPOSITION muscovite northern occur outcrop Pakistan pegmatite Peshawar Plain petrography petrology plagioclase pluton Punjab Univ pyrite pyrochlore pyroxenites quartz quartzite range region Reshian rhyolite river samples sandstones schistosity schists sediments sequence shales Shangla Shilman Siwalik sphene subduction suggest Swat syenites Tahirkheli Tarbela tectonic ultramafic University of Peshawar veins Warsak