Records of the Geological Survey of India, Volume 112, Part 5The Survey, 1979 - Earthquakes Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals. |
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Page 5
... silica ( largely due to clay fraction ) and moderate in iron , whereas the bauxites derived from the gne- isses , as those of Nileswar and Kumbla in Cannanore district , are high in iron and moderate to low in silica . This is clearly a ...
... silica ( largely due to clay fraction ) and moderate in iron , whereas the bauxites derived from the gne- isses , as those of Nileswar and Kumbla in Cannanore district , are high in iron and moderate to low in silica . This is clearly a ...
Page 25
... silica content for the corresponding calcia and magnesia values . It is also noted that for magnesia content of about 20 percent the silica content would be of the order of about 55 percent . The calcia and alumina contents of the Chalk ...
... silica content for the corresponding calcia and magnesia values . It is also noted that for magnesia content of about 20 percent the silica content would be of the order of about 55 percent . The calcia and alumina contents of the Chalk ...
Page 27
... Silica Occurs Secondary silica , at places opal , associated with the the magnesite veins , which renders it less economic . The formation of silica due to the process of serpentinisation has been discus- sed . Magnesite Magnesite ...
... Silica Occurs Secondary silica , at places opal , associated with the the magnesite veins , which renders it less economic . The formation of silica due to the process of serpentinisation has been discus- sed . Magnesite Magnesite ...
Contents
RECORDS | 1 |
Petrology of the Ultramafic Rocks of Chalk Hills Salem Tamil Nadu | 15 |
Studies on the Dolerite Dykes of Hunsur Periyapatna area Mysore District | 35 |
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amphibole aquifers Auroville banded ferruginous barytes beds biotite borehole carbonate Chalk Hills charnockitic chemical chert chert/quartzite chlorite clay clinopyroxene colour Cretaceous Cuddapah basin Dharwar diopside dips district dolerite dolomite drilled dunites dykes East lode electrical log faults feldspars formation Gadag Geol Surv Ind GEOLOGICAL SURVEY geomorphic gms/tonne gneisses goethite gold grains granite granulites Groundwater hematite hornblende hornblendite igneous indicates iron Kabuliyatkatti Karnataka Kerala lapilli laterite layers limestone magma magnesite Mangampeta mapping metamorphism metres minerals Murthy Mysore Nilgiri occur olivine outcrops peridotites plagioclase present pyroxene pyroxenite quartz quartzite Quilon range Rec Geol Surv Red Oxide Salem samples sands sandstone Sandur schist sedimentary sediments serpentinite shear zone shonkinite silica strike length studies surface Survey of India taluk Tamil Nadu tectonic Tertiary thickness tonnes trend ultrabasic ultramafic bodies ultramafic rocks Unpublished GSI Report upto a depth varies vein barytes Vempalle Warkalli