On the Amphibolities from the Indian Research Stationat Antarctica.

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF788998260&userType=user&freeTextValue=Amphibolities

Brief Description (Abstract):

In the Dakshin Gangotri landmass, dykes, pockets and lenticular outcrops of massive weatheredamphibolites are noticed within the gneisses.Mineralogically three zones have been established in order of increasing grades, viz., Zone A:Amphibolite with sphene but without diopside; Zone B: Amphibolite with both sphene and diopside;Zone C: Amphibolite with diopside but no sphene.

Status: Completed

Purpose: The amphibolites form very few exposures around the Indian Research Station at Antarctica and are scattered in parts of the area. Mostly they form weathered massive, lenticular exposures and occur as dykes, veins, small pockets, lenses of small dimension within gneisses. They are well foliated and lineated by parallel alignment of streaky prismatic grains of hornblende. The amphibolites show a northwesterly trend parallel to the strike of the foliation of the gneisses. The amphibolites show sharp or gradational contact with the gneisses. Layers of amphibolites are ptygmatically folded inmigmatitic outcrop. Quartz veins occupy the joint planes in amphibolite. Gradation of texture (orstructure) from granoblastic to gneissose and at places to schistose was seen in the same body ofamphibolite.

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: On the Amphibolities from the Indian Research Station at Antarctica,

Topic Category(s): GeoScientific Information,

Date(s): 2020-08-24 (Creation),

Resource Contact(s):
1. Name : Dr. M K Kaul
    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