Mineralogical Variation in the Gneisses from Dakshin Gangotri, Antarctica.
Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all¶meter=MF313508031&userType=user&freeTextValue=Mineralogical+Variation+in+the+Gneisses+from+Dakshin+Gangotri%2C+Antarctica.
Brief Description (Abstract):
Mineralogical variations in the gneisses of Dakshin Gangotri was studied by determination of R.I.by liquid immersion method, optic axial angle measurement, determination of composition of plagioc-lase by the help of a universal stage and determination of composition of biotite and hornblende fromR.I. (Ny and Nz).
Status: Completed
Purpose: Geological mapping has been carried out around the Indian Research Station Dakshin Gangotri (Lat. 74? 45S, Long. 11?37E), which is on the Schirmacher Range of Antarctica. The dominant rocktype present is the biotite-hornblende bearing quartzo-feldspathic gneiss which is the country rockin which are intruded dykes and sills of pegmatite, metadolerite, amphibolite and melasyenite. Thebiotite-hornblende bearing quartzo-feldspathic gneiss is further sub-divided on field and petro-graphic basis into the following four units 1. Microcline rich granoblastic gneiss with faint foliation (Migmatitic gneiss). 2. Garnet porphyroblastic gneiss with pegmatite veins (Migmatitic gneiss). 3. Porphyroblastic gneiss with mafics showing strong foliation. 4. Microcline porphyroblastic gneiss.
Presentation Format: Documentdigital
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Supplemental Information:
TableDigital
Keyword(s):
Earth Science-Land Surface,
Place/Location(s):
Dakshin Gangotri,
Antarctic,
Project:
Mineralogical Variation in the Gneisses from Dakshin Gangotri,
Topic Category(s): GeoScientific Information,
Date(s): 2020-08-24 (Creation),
Resource Contact(s):
1. Name : Dr. S K Chakraborty
Role : PrincipalInvestigator
Phone : 8322525515
E-Mail : ictd [ at ] ncpor.res.in
Organization Name : National Centre for Polar and Ocean Research (NCPOR)
Address : Headland Sada, Vasco da Gama, Goa 403804
City : Vasco-da-Gama
State : Goa
Postal Code : 403804
Country : IND
Distributor Contact(s):
1. Name : Mr. Sakthivel Samy V
Role : Distributor
Phone : +91-832-2525515
E-Mail : vssamy [ at ] ncpor.res.in
Organization Name : National Centre for Polar and Ocean Research (NCPOR)
Address : Headland Sada, Vasco da Gama, Goa 403804
City : Vasco-da-Gama
State : Goa
Postal Code : 403804
Country : IND
Metadata Contact(s):
1. Name : Mr. Sakthivel Samy V
Role : PointOfContact
Phone : +91-832-2525515
E-Mail : vssamy [ at ] ncpor.res.in
Organization Name : National Centre for Polar and Ocean Research (NCPOR)
Address : Headland Sada, Vasco da Gama, Goa 403804
City : Vasco-da-Gama
State : Goa
Postal Code : 403804
Country : IND
Extent:
Start Date : 1982-01-01
End Date : 1983-12-31