Records of the Geological Survey of India, Volume 140, Part 5The Survey, 2007 - 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 68
... minerals recovered from stream sediments were studied under binocular microscope . The common minerals present in the sediment are epidote , amphiboles , garnet , magnetite , zircons , ilmenite , tourmaline , mica , pyroxene , sphene ...
... minerals recovered from stream sediments were studied under binocular microscope . The common minerals present in the sediment are epidote , amphiboles , garnet , magnetite , zircons , ilmenite , tourmaline , mica , pyroxene , sphene ...
Page 69
... mineral concentrates were scanned under binocular microscope for kimberlitic indicator minerals such as chrome diopside , picro ilmenite , pyrope garnet and chrome spinel . No kimberlitic indicator minerals could be found in the samples ...
... mineral concentrates were scanned under binocular microscope for kimberlitic indicator minerals such as chrome diopside , picro ilmenite , pyrope garnet and chrome spinel . No kimberlitic indicator minerals could be found in the samples ...
Page 115
... minerals . Biotite is partly altered to chlorite and epidote / clinozoisite . Plagioclase is partly altered to sericite and epidote . This variety is classified as alkali feldspar granite . The country rock ( Bhavani Gneiss ) is ...
... minerals . Biotite is partly altered to chlorite and epidote / clinozoisite . Plagioclase is partly altered to sericite and epidote . This variety is classified as alkali feldspar granite . The country rock ( Bhavani Gneiss ) is ...
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abutment Additional Item amphibolite ANDHRA PRADESH bed rock biotite block boreholes boreholes drilled carried charnockite clay CONSTRUCTION STAGE GEOTECHNICAL cover Cuddapah cut off trench cut-off depth DISTRICT dolerite dolerite dyke downstream earth dam excavated exposed field season flank foliation Formation foundation fresh rock garnet garnetiferous geological mapping GEOTECHNICAL INVESTIGATION gneiss gold granite granitoids granulite gravity grey ground level hornblende indicated intrusive joints KARNATAKA KERALA Khondalite kimberlite Kumar laterite limestone lineament located magnetite migmatite mineralisation minerals moderate monzogranite NE-SW NW-SE overburden pegmatite Peninsular Gneissic Complex penstock permeability tests powerhouse project authorities proposed Puducherry pyroxene pyroxene granulite quartz quartz veins quartzite river rock types samples schist Schist belt seismic shale shear zone slope soil Specialised Thematic Mapping spillway sq km STAGE GEOTECHNICAL INVESTIGATION strike length structure studies suggested Tamil Nadu terrain thickness toposheet traversed tunnel upto values varies vertical weir width