Geological Bulletin, Volume 14University of Peshawar, 1981 - Geology |
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Page 52
... calc - alkali series , and high - K series . In the SiO2 versus KO diagram ... alkaline lava suite tends to separate these rocks from the high - K salic ... ( Calc - alkali ) Low - K andesite 53 55 60 Dacite ( calc - alkali ) Low - K dacite ...
... calc - alkali series , and high - K series . In the SiO2 versus KO diagram ... alkaline lava suite tends to separate these rocks from the high - K salic ... ( Calc - alkali ) Low - K andesite 53 55 60 Dacite ( calc - alkali ) Low - K dacite ...
Page 59
Calc - alkaline volcanic rocks are predominant in the island arcs and orogenic ( mobile ) continental marginal zones , both being regions in which subduction is interpreted to play a major role in the generation of magmas . Within the ...
Calc - alkaline volcanic rocks are predominant in the island arcs and orogenic ( mobile ) continental marginal zones , both being regions in which subduction is interpreted to play a major role in the generation of magmas . Within the ...
Page 60
TABLE 4 . COMPARISON OF CHEMICAL INDICES OF THE CALC - ALKALINE LAVAS FROM THE KALAM VOLCANIC ZONE WITH THE DATA FOR CALC - ALKALI ISLAND ARC AND THAT OF THE CONTINENTAL MARGIN ( ANDEAN ) AFTER JAKE AND WHITE ( 1972 ) . Range of SiO2 ...
TABLE 4 . COMPARISON OF CHEMICAL INDICES OF THE CALC - ALKALINE LAVAS FROM THE KALAM VOLCANIC ZONE WITH THE DATA FOR CALC - ALKALI ISLAND ARC AND THAT OF THE CONTINENTAL MARGIN ( ANDEAN ) AFTER JAKE AND WHITE ( 1972 ) . Range of SiO2 ...
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 |
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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