Magnetic Fabric Studies in Larsemann Hills, Prydz Bay Region, East Antarctica.
Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all¶meter=MF548077926&userType=user&freeTextValue=Magnetic+Fabric+Studies+in+Larsemann+Hills%2C+Prydz+Bay+Region%2C+East+Antarctica.
Brief Description (Abstract):
Larsemann Hills region, East Antarctica was studied for directional magnetic properties of magnetic susceptibility, known as the Anisotropy of Magnetic Susceptibility with the objective to obtain further constraints on Precambrian geological evolutionary history of the region. This independent approach provides supportive data for evaluating deformation history with the advantage that even weak fabric anisotropies can be recognized and documented, therefore useful in discriminating initial deformation or overprint of sedimentary fabrics. Rock units, various pelites and granite gneisses in the Larsemann Hills region document a diachronous geological evolutionary history which includes a Paleoproterozoic felsic/mafic gneiss basement over which younger supracrustal sequence of pelitic, psammitic and felsic para-gneisses were deposited.
Status: Completed
Purpose: A total of 53 on-site oriented samples were selected and studied for AMS using standard techniques. The data were plotted on Schmidt Net to identify AMS principal axes. The magnetic fabrics reflect preferred-orientation of all the constituents of a rock viz. the ferromagnetic, paramagnetic and diamagnetic minerals. Magnetic fabric studies carried out on quartzo-feldspathic gneiss (ortho-gneiss) and amphibolite from the Schirmacher Oasis, Magnetic fabric analysis has identified magnetic susceptibilities in the range of paramagnetic to mixed-type (paramagnetic ferromagnetic), related to biotite and hornblende subfabrics. The magnetic fabric anisotropies allow two possible groupingscharacterized by prolate (linear) and oblate (planar) geometries.
Presentation Format: Documentdigital
Distribution Format: unknown
Distribution Format Version: unknown
Supplemental Information:
TableDigital
Keyword(s):
Earth Science-Solid Earth,
Place/Location(s):
Schirmacher Oasis,
Antarctic,
Project:
Magnetic Fabric Studies in Larsemann Hills,
Topic Category(s): GeoScientific Information,
Date(s): 2020-10-08 (Creation),
Resource Contact(s):
1. Name : Dr. M K Pandit
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 : 2006-01-01
End Date : 2007-12-31