Geology of Schirmacher Range (Dakshin Gangotri),East Antarctica.
Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all¶meter=MF1026280142&userType=user&freeTextValue=Geology+of+Schirmacher+Range+%28Dakshin+Gangotri%29%2CEast+Antarctica.
Brief Description (Abstract):
An area of 35 sq km in the Schirmacher Range of Queen Maud Land East Antarctica was geo-logically mapped on scale 1 25 000. Six major lithological units (a) banded gneiss (b) alaskite (c) garnet biotite gneiss (d) calc gneiss khondalites and associated migmatites (e) augengneiss and (f) streaky gneiss are delineated. The rocks have suffered an early metamorphism under granulite facies conditions and an early migmatization leading to the development of charnockitic rocks. Over a large part of the area the granulite facies assemblages have suffered complete or partial diapthoresis under amphibolite facies conditions. This was contemporaneous with extensive granitisation.
Status: Completed
Purpose: The Precambrian basement of the East Antarctic shield is mostly covered with ice and out crops are restricted along the narrow coastal zone. The Schirmacher Range emerges as a rock oasis bet-ween the continental ice sheet and the coastal ice shelf occupying an area of 35 sq km between 77? 4430 - 70?46 30 south latitudes and 11?22 4 - 11?54 00 east longitudes. The major mountain system of Queen Maud Land runs for about a thousand kilometres approximately parallel to the coastline and has been studied by several workers (Roots 1953 Autenboer et al 1964 Craddock 1972,Juckes 1972 Ravich 1972 1982 Kamenev 1972 Ravich and Kamenev 1975). The Schirmacher Range is situated approximately half way between the main mountain range and the present coast line.
Presentation Format: Documentdigital
Distribution Format: unknown
Distribution Format Version: unknown
Supplemental Information:
TableDigital
Keyword(s):
Earth Science-Land Surface,
Place/Location(s):
Dakshin Gangotri,
Antarctic,
Project:
Geology of Schirmacher Range (Dakshin Gangotri),
East Antarctica,
Topic Category(s): GeoScientific Information,
Date(s): 2020-08-26 (Creation),
Resource Contact(s):
1. Name : Dr. Sudipta Sengupta
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 : 1983-01-01
End Date : 1984-12-31