Journal of Himalayan Geology, Volume 5Wadia Institute of Himalayan Geology, 1994 - Geology |
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Page 67
Dykes of intermediate composition do occur in this zone . These intermediate
dykes are darker than the enclosing granitoids . Northern Metasediments A
metamorphic band separates the batholith from the Karakorum Tethys sequence
.
Dykes of intermediate composition do occur in this zone . These intermediate
dykes are darker than the enclosing granitoids . Northern Metasediments A
metamorphic band separates the batholith from the Karakorum Tethys sequence
.
Page 81
Plagioclase composition varies from oligoclase to andesine ( An25- 35 ) . Albite (
Anz - 9 ) with simple polysynthetic twinning is secondary , formed during
mylonitization . Except for secondary albite , plagioclases are clouded . K -
feldspar form ...
Plagioclase composition varies from oligoclase to andesine ( An25- 35 ) . Albite (
Anz - 9 ) with simple polysynthetic twinning is secondary , formed during
mylonitization . Except for secondary albite , plagioclases are clouded . K -
feldspar form ...
Page 109
This suggests that the rocks are not far away from the minimum melt composition
( cf Elsdon & Gupta , 1981 ) . Various oxides are plotted against SiO2 wt . % ( Figs
. 6 ) . CaO , MgO , FeO , and TiO2 exhibit , though poor , an antipathic ...
This suggests that the rocks are not far away from the minimum melt composition
( cf Elsdon & Gupta , 1981 ) . Various oxides are plotted against SiO2 wt . % ( Figs
. 6 ) . CaO , MgO , FeO , and TiO2 exhibit , though poor , an antipathic ...
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Contents
Petrogenesis of the Granitoid Rocks Chor Region Himachal Himalaya | 1 |
N S VIRDI Basement Structures and their possible relation to Sedimentation and Tectonics in | 9 |
N S VIRDI Basement Structures and their possible relation to Sedimentation and Tectonics in | 11 |
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Common terms and phrases
Agglomeratic Slate analysis associated band base basin bedded belt chert components composition comprising conglomerate contain covered deformation Dehra deposits developed direction distribution district earthquake et al exposed facies fault fault plane feldspar field folds foliation followed Formation fossils Garhwal Geol gneiss grained granites granitoids grey Group higher Himalaya Himalayan Geology India indicates inversion Jour Kashmir Ladakh Lamayuru Late Lesser limestone lineation locality locations lower major Member metamorphic minerals observed occur Panjal pebbles phase phyllites plagioclase plane Pleistocene porphyries present quartz quartzite range region reported represented river road rocks samples sandstone schist sector sedimentary sediments sequence shale Sharma shown Slate slide slip slope soil strain stratigraphy strike structures suggest Surv Table tectonic thick thrust trace unit upper valley VALUES Volcanics Wadia weathered Zanskar zone