Himalaya: Geological Aspects, Volume 1P. S. Saklani Contributed articles. |
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Page 436
... biotite Migmatitic dio- rite Coarse - grained biotite garnet gneiss Location of sample 1 km south of Pangboche II K / Ar # Field # Mineral % K % radiog . Ar Age ( m.y. ) KA 726 30-2 Biotite 4.89 .64 39.5+ 2 same sample KA 721 same ...
... biotite Migmatitic dio- rite Coarse - grained biotite garnet gneiss Location of sample 1 km south of Pangboche II K / Ar # Field # Mineral % K % radiog . Ar Age ( m.y. ) KA 726 30-2 Biotite 4.89 .64 39.5+ 2 same sample KA 721 same ...
Page 452
... Biotite Zone : Garnet Zone : Chloritoid Zone : Staurolite Zone : Kyanite Zone : ( i ) quartz - oligoclase - sericite ... biotite - opaques , ( ii ) quartz - chlorite - muscovite - epidote - biotite - opaques , ( iii ) quartz - oligoclase ...
... Biotite Zone : Garnet Zone : Chloritoid Zone : Staurolite Zone : Kyanite Zone : ( i ) quartz - oligoclase - sericite ... biotite - opaques , ( ii ) quartz - chlorite - muscovite - epidote - biotite - opaques , ( iii ) quartz - oligoclase ...
Page 454
... biotite and chlorite . Although biotite has partially broken down to form garnet , it forms a stable phase in this paragenesis , because as evidenced by the A'KF plots ( Fig . 4 ) the bulk chemical composition of the rock plots above ...
... biotite and chlorite . Although biotite has partially broken down to form garnet , it forms a stable phase in this paragenesis , because as evidenced by the A'KF plots ( Fig . 4 ) the bulk chemical composition of the rock plots above ...
Contents
Tectonics and Structure of the Pamirs | 1 |
Peninsular and Himalayan Precambrian Belts | 31 |
Central Indian Ridge and Himalayan Mountain System | 55 |
Copyright | |
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Acharyya Alpine Alps associated basement faults basin batholith belt biotite Bordet Central Crystalline chlorite collision continental Cretaceous crust crustal deformation deposits earthquakes eastern Eocene facies flysch folds foreland formation Gansser Garhwal garnet Geodynamics Geol Geology Geophys geosyncline gneiss Gondwana granite Higher Himalaya Himalaya Indian plate Indian Shield Indus Suture island arc Jour Karakorum Kashmir Klootwijk Krol Kumaun Ladakh Late Lesser Himalaya limestone Lower magmatic Main Boundary Main Central Thrust margin melange Mesozoic metamorphism Molnar movement nappe Nepal northern northward occur oceanic ophiolite orogenic Pakistan Palaeocene palaeomagnetic Palaeozoic Pamir Pande Panjal Permian phase plate tectonics Plateau Precambrian Proterozoic quartzite Quetta Range region rocks rotation Saklani sandstones Saxena schists sedimentary sediments seismicity sequence serpentinite Sharma Shyok Simla Siwalik southern stratigraphic structural Surv suture zone Tectonic Zone Tectonophysics Tertiary Tethyan Tethys thickness Tibet Tibetan slab Triassic Upper Valdiya volcanics