Geological Bulletin, Volume 5University of Peshawar - Geology |
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Page 31
The actinolite , biotite , and chlorite float around larger plagioclase grains . The
rock may originally have been a diorite or norite altered on contact with schists
and modified ( as indicated by the parallel arrangement of minerals ) by latcr ...
The actinolite , biotite , and chlorite float around larger plagioclase grains . The
rock may originally have been a diorite or norite altered on contact with schists
and modified ( as indicated by the parallel arrangement of minerals ) by latcr ...
Page 42
It may be associated with ore and / or biotite ; with the latter and quartz , more
rarely , it is in intergrowths . Ore is gèneraily magnetite / ilmenite that may , in
some , be altered to reddish oxide or hydroxide . In rare cases , the rocks may
also ...
It may be associated with ore and / or biotite ; with the latter and quartz , more
rarely , it is in intergrowths . Ore is gèneraily magnetite / ilmenite that may , in
some , be altered to reddish oxide or hydroxide . In rare cases , the rocks may
also ...
Page 46
The dark colour is mainly due to biotite but some also have other dark minerals .
Sample no . 38 , although containing about 10 % muscovite and 2 to 3 % garnet ,
looks pure white in hand specimen . The rocks are generally medium - grained ...
The dark colour is mainly due to biotite but some also have other dark minerals .
Sample no . 38 , although containing about 10 % muscovite and 2 to 3 % garnet ,
looks pure white in hand specimen . The rocks are generally medium - grained ...
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abundant Agency Ahmad altered amphibolites appears associated Attock Slates Attock-Cherat bands base basis brown Bull Cherat chlorite clay colour common composed composition considered contains correlated Cretaceous Davies deposits detailed developed diorites District east epidote exposed extends feet feldspar Formation fossils fractures garnet Geol geology Gilgit gneisses grains granitic green grey Hazara Hornblendic Group Ibid India Indus intrusions iron Jour Khan Khyber latter light limestone Long Lower mainly major Manki Marks Martin Masjid material metamorphic Middle miles minerals minor norites northern occur outcrops Panjab Peshawar Phyllite places plagioclase present probably quartz quartzite Range reef region reported River rocks samples sandstone Schistose schists sericite Shah shale shows Silurian southern Stauffer stratigraphic structure suggests Surv Swat Tahirkheli thick thin Thin Section units Univ Upper Valley various veins village weathered West Pakistan western