Records of the Geological Survey of India, Volume 112, Parts 7-8Government of India, 1981 - Earthquakes Includes the "Annual report of the Geological Survey of India," 1867- |
From inside the book
Results 1-3 of 19
Page 10
... porphyry and rhyolite is marked by the presence of about 50 cm wide altera- tion zone in which the grain size of porphyry is smaller . Near the contact of porphyry and rhyo- lite , fragments of porphyry are found within the rhyolite ...
... porphyry and rhyolite is marked by the presence of about 50 cm wide altera- tion zone in which the grain size of porphyry is smaller . Near the contact of porphyry and rhyo- lite , fragments of porphyry are found within the rhyolite ...
Page 30
... porphyry dyke , about two metre wide and ten metres long , cutting through the porphyroblastic granite on the southern face of the hill . The eastern monzonite porphyry dyke occurs within the rhyolite along its contact with the meta ...
... porphyry dyke , about two metre wide and ten metres long , cutting through the porphyroblastic granite on the southern face of the hill . The eastern monzonite porphyry dyke occurs within the rhyolite along its contact with the meta ...
Page 93
... porphyry ( 5 ) and quartz felsite ( 6 ) . Quartz V Alkali Felspar Plagioclase Granite Porphyry C.I.P.W. Norm ( 5 ) ( 6 ) ( 5 ) ( 6 ) SiO2 74.98 76.49 TiO 2 0.32 0.15 Q 37.50 55.32 Al2O3 12.56 13.86 Or 29.47 28.91 Fe2O3 0.79 1.10 Ab ...
... porphyry ( 5 ) and quartz felsite ( 6 ) . Quartz V Alkali Felspar Plagioclase Granite Porphyry C.I.P.W. Norm ( 5 ) ( 6 ) ( 5 ) ( 6 ) SiO2 74.98 76.49 TiO 2 0.32 0.15 Q 37.50 55.32 Al2O3 12.56 13.86 Or 29.47 28.91 Fe2O3 0.79 1.10 Ab ...
Contents
RECORDS | 1 |
Geology Structure and Sulphide Mineralisation of Tosham District Bhiwani Haryana | 7 |
Geology and Geochemistry of Sulphide Mineralisation in Teejanwali Hill Mahendragarh | 17 |
26 other sections not shown
Other editions - View all
Common terms and phrases
Ajabgarh albite altered anomaly Aravalli Banded Gneissic Complex Bari Sadri basin Bayana beds belt Berach Berach Granite Bhadesar biotite calcite chert chlorite colour conglomerate country rocks crystalline Delhi Supergroup Deoban deposits district dolomite east eastern epidote fault felspar fluvial folds foliation Formation fractures Geol Geological Survey glacial glacier gneiss grade grains granite grey groundmass Himalaya hornblende intrusive Jamuna Jogipura Jutogh kankar limestone magmatic magnetite Mandhali metamorphism metasediments metres mica schist microcline migmatites mineralisation minerals muscovite NE-SW Nithar NW-SE occur oligoclase orthoclase overlying pebbles pegmatite phase phenoclasts phyllite places plagioclase Plate-1 porphyry Pre-Aravalli pre-Delhi Purola quartz quartzite Rajasthan region rhyolite river samples sand Sandstone schist schistose sediments seen sequence sericite shale shows slate sphene stratigraphic Sub-basin Supergroup surface Surv Survey of India tectonic terraces texture thick thin Thrust Tosham trend tuff unconformity valley veins Vindhyan Volcanics Wazri zircon zone