Geological Bulletin, Volume 11University of Peshawar, 1979 - Geology |
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Page 68
... pyroxenites ) have not been found interlayered . In rare cases , the pyroxenite layers contain thin veins . of noritic material , whilst phase layering ( Hess , 1960 ) is almost non - existent in Swat . The layering generally diminishes ...
... pyroxenites ) have not been found interlayered . In rare cases , the pyroxenite layers contain thin veins . of noritic material , whilst phase layering ( Hess , 1960 ) is almost non - existent in Swat . The layering generally diminishes ...
Page 69
... pyroxene has been described from some anorthosite complexes , and Hargraves ( 1962 ) has also reported layering due to ... pyroxenites considered to result from metamorphic differentiation . Nor can he offer any explanation other than ...
... pyroxene has been described from some anorthosite complexes , and Hargraves ( 1962 ) has also reported layering due to ... pyroxenites considered to result from metamorphic differentiation . Nor can he offer any explanation other than ...
Page 70
... pyroxenites with sharp contacts in norites of Dir . The general mode of these rocks is similar to the pyroxenite layers . These rocks have been interpretted to be earlier differentiated pyroxenites of the norite magma some of which were ...
... pyroxenites with sharp contacts in norites of Dir . The general mode of these rocks is similar to the pyroxenite layers . These rocks have been interpretted to be earlier differentiated pyroxenites of the norite magma some of which were ...
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Common terms and phrases
abundant amphibole amphibolites andesite anorthosite assemblages associated Bajaur Baltistan bands Baraul belt biotite Bull calc-alkaline Chaudhry Chitral chlorite clinopyroxene coarse-grained composition contain Cretaceous Desio Diwangar epidote fault feldspar foliation Formation garnet granulites Geol Geology Gilgit gneisses gneissose grains granitic rocks Granodiorite granulites green Greenstone Complex grey Group Hazara Himalaya hornblende hypersthene igneous Indo-Pakistan Indus valley intrusions island arc Jan and Mian Jandul Kakar Kalam Karakoram Khan Kohistan layers limestone mafic magma Main Mantle Thrust margins metamorphic metasedimentary rocks metasediments mica Nanga Parbat norites occur opaque minerals orthopyroxene outcrops Pakistan pegmatites peridotites Peshawar Petrography petrology plagioclase plate pyroxene pyroxene granulites pyroxenites quartz diorites quartzites rarely region Reshun rutile schists sequence SiO2 slates southern sphene structure suture zone Swat Kohistan syntaxis Tahirkheli tectonic Tertiary texture thick trend tuffs twinning ultramafic rocks Univ Upper Swat Ushu Gol Utmankhel veins vicinity volcanic rocks whilst xenoliths Yasin