Geological Bulletin, Volume 14University of Peshawar, 1981 - Geology |
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Page 21
The vermicules and blobs may be restricted to the selective parts of the enclosing
albite grains . Within the limits of a plagioclase grain the intergrown quartz is in
optical continuity but is often more abundant cases , a part of an albite grain may
...
The vermicules and blobs may be restricted to the selective parts of the enclosing
albite grains . Within the limits of a plagioclase grain the intergrown quartz is in
optical continuity but is often more abundant cases , a part of an albite grain may
...
Page 136
In Reshian gneiss , it was noted that sometime two or more albite crystals in
contact with microcline crystals form composite grains of porphyroblasts .
Furthermore , in Reshian , albite and microcline porphyroblasts contain dust like
opaque ...
In Reshian gneiss , it was noted that sometime two or more albite crystals in
contact with microcline crystals form composite grains of porphyroblasts .
Furthermore , in Reshian , albite and microcline porphyroblasts contain dust like
opaque ...
Page 185
The grains are mostly of quartz , chert , rock fragments and mica . Grains of
garnet ... The matrix is composed of very small grains described above , and of
clay , sericite , and calcite ( which also is a cementing material ) . The cement is ...
The grains are mostly of quartz , chert , rock fragments and mica . Grains of
garnet ... The matrix is composed of very small grains described above , and of
clay , sericite , and calcite ( which also is a cementing material ) . The cement is ...
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Contents
The Geology and Petrography of the Tarbela Alkaline Complex | 1 |
Petrography of the Loe Shilman Carbonatite Complex Khyber Agency | 29 |
Major Elements Abundance in the Kalam Lavas | 45 |
Copyright | |
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Common terms and phrases
abundant albite albitites alkaline altered amphibole andesite apatite associated band basic beds belt biotite bodies brown Bull calcite carbonate carbonatite chemical chlorite complex composition consist contain deposits described detailed developed diorites dolomite epidote et al fault feldspar field Formation gabbroic Geol Geology gneisses grains granites granitic rocks green Himalayas hornblende igneous indicate Indus intrusions island arc Jurassic Kalam Karakoram Kempe Kohistan Late Limestone locally lower magmatic magnetite major margin metamorphism microfacies minerals minor muscovite normal northern obducted occur origin outcrop Pakistan Peshawar petrography phases plagioclase Plate Pleistocene present pyrite pyrochlore quartz quartzite range region reported river rocks samples sandstones schists sediments sequence sericite shales similar Siwalik sphene structure suggest Swat syenites Table Tahirkheli Tarbela tectonic thick thin Traces Univ University Upper Valley varieties veins volcanic Warsak West zone