Calc-alkaline Lamprophyres from Schirmacher Oasis, Queen Maud Land, East Antarctica.

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF569387463&userType=user&freeTextValue=Calc-alkaline+Lamprophyres+from+Schirmacher+Oasis%2C+Queen+Maud+Land%2C+East+Antarctica.

Brief Description (Abstract):

Several lamprophyre dykes of calc-alkaline (shoshonitic) nature are reported from Schirmacher Oasis,Queen Maud Land, in Eastern Antarctica. These dykes are characterised by high K2O/Na2O (avg. 5.81) ratios, high Rb,Sr,Zr and Th abundances. REE distribution patterns show a significant enrichment of LREE against HREE (avg. Lan/Ybn=27.51 ) without any Eu anomaly and appears that these ultrapotassic dykes have been derived from partial melting of a thickened lithosphere.

Status: Completed

Purpose: During the 13th Indian Antarctic scientific expedition, several lamprophyre dykes were noticed in the Schirmacher Oasis. The aim of this is to record these occurrences and describe the petrography and geochemistry of the lamprophyres.

Presentation Format: Documentdigital

Distribution Format: unknown

Distribution Format Version: unknown

Supplemental Information:

TableDigital

Keyword(s): Earth Science-Paleoclimate,

Place/Location(s): Schirmacher Oasis, Antarctic,

Project: Calc-alkaline Lamprophyres from Schirmacher Oasis,

Topic Category(s): ClimatologyMeteorologyAtmosphere,

Date(s): 2020-09-15 (Creation),

Resource Contact(s):
1. Name : Dr. S H Jafri
    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 : 1993-01-01
End Date   : 1994-12-31