Geological Bulletin, Volume 14University of Peshawar, 1981 - Geology |
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Page 5
Amphibole diorites in some cases become coarser grained with large grains of
plagioclase . Amphibole in most of the gabbroic rocks and plagioclase in some is
poikilitic or sub - poikilitic . In a few cases the clinopyroxene in the amphibole ...
Amphibole diorites in some cases become coarser grained with large grains of
plagioclase . Amphibole in most of the gabbroic rocks and plagioclase in some is
poikilitic or sub - poikilitic . In a few cases the clinopyroxene in the amphibole ...
Page 6
It is norphenocryst phase as well as in the groundmass . Alteration of augite to
green amphibole , chlorite and opaque dust is common in most of the rocks
except where contained poikilitically in the plagioclase . Local replacement of
augite by ...
It is norphenocryst phase as well as in the groundmass . Alteration of augite to
green amphibole , chlorite and opaque dust is common in most of the rocks
except where contained poikilitically in the plagioclase . Local replacement of
augite by ...
Page 9
Plagioclase , clinopyroxene , amphibole and magnetite are the principal common
minerals . In addition secondary biotite , epidote , sphene , chlorite and carbonate
are present in minor proportions in various samples and quartz in one .
Plagioclase , clinopyroxene , amphibole and magnetite are the principal common
minerals . In addition secondary biotite , epidote , sphene , chlorite and carbonate
are present in minor proportions in various samples and quartz in one .
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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 |
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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