Geological Bulletin, Volume 5University of Peshawar - Geology |
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Page 20
... pyroxene with accessory iron ore , although alteration in many of them has produced various new minerals . The rocks in thin sections usually display ophitic to sub - ophitic texture . Alteration has proceeded to different degrees in ...
... pyroxene with accessory iron ore , although alteration in many of them has produced various new minerals . The rocks in thin sections usually display ophitic to sub - ophitic texture . Alteration has proceeded to different degrees in ...
Page 38
... pyroxene are also seen in it . The plagioclase of the rock is partly twisted , fractured and undulose . In no . 25 , some of the pyroxene grains are intimately intergrown with quartz ( minor ) and hornblende with a " seive texture ...
... pyroxene are also seen in it . The plagioclase of the rock is partly twisted , fractured and undulose . In no . 25 , some of the pyroxene grains are intimately intergrown with quartz ( minor ) and hornblende with a " seive texture ...
Page 41
... pyroxene ( orthopyroxene being more abundant ) , 5.2 % hornblende , 3.2 % ore , 1 % each of quartz and biotite , traces of apatite , and minor quantities of other minerals such as garnet , scapolite , epidote , ( ? ) sphene , and ...
... pyroxene ( orthopyroxene being more abundant ) , 5.2 % hornblende , 3.2 % ore , 1 % each of quartz and biotite , traces of apatite , and minor quantities of other minerals such as garnet , scapolite , epidote , ( ? ) sphene , and ...
Contents
Vol | 1 |
Vol | 5 |
Petrography of the upper part of Kohistan and southwestern Gilgit | 27 |
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abundant Ahmad Ali Masjid altered amphibole amphibolites Attock Attock Slates Attock-Cherat Range bands biotite Bull calcareous calcite carbonate Carboniferous Cherat chlorite colour correlated Cretaceous cross-bedding Darwazai deposits Devonian diorites dolomite epidote exposed feet thick feldspar fossils fractures garnet Geol geology Gilgit Agency gneisses grains granitic green grey Hazara District hornblende Ibid igneous India Indus River intrusions Jamrud Jan and Tahirkheli Jour Khan Khattak Khewra Formation Khwar Khyber Agency Kohat Kohistan Landikotal Slate limestone lithological Manki Slate Masjid Formation metamorphism metasedimentary miles minerals minor Mohmand Agency muscovite nala norites Nowshera occur outcrops Palaeozoic Paleocene Panjab Univ pegmatites Peshawar phyllites plagioclase pyroxene quartz quartzite reef region Rehman Ripple Marks rocks Salt Range sandstone Schistose Group schists sedimentary Shagai Shagai Limestone Shah Dheri shale Silurian Siluro-Devonian slaty shale Stauffer stratigraphic structures Surv Tertiary thin bedded Thin Section ultramafic veins weathered West Pakistan yellowish