9c425424-b18f-4875-ad09-f439b7a1f1c1 English UTF-8 Dataset Mr. Sakthivel Samy V National Centre for Polar and Ocean Research (NCPOR) +91-832-2525515 Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND vssamy@ncpor.res.in Point of contact 2020-12-11 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Delineation of Tectonic Features of Schumacher Oasis, East Antarctica Using Total Field Geomagnetic Profiling. 2020-09-15 Creation Document digital Delineation of tectonic features of Schirmacher Oasis (S.O.) using total field geomagnetic profiling needs skill because: a. The exposed rocks have little magnetic contrast and have undergone multiple episodes of metamorphism, migmatization and deformation. b. The lithological contacts are sharp and generally steeply dipping, with the faults and shears trending east-west. c. Topography is very rugged, dotted by numerous water bodies during summer and the north-south extent of S.O. on an average is 1.0 km and d. Geomagnetic storms are sudden, large, frequent and long lasting, allowing few fortuitous windows for meaningful observations. The main objective of the present magnetic survey was to obtain magnetic response of the geological units and structural features inferred from the photo-geological map of Bormann et al. (1986). Accordingly several traverses were planned and laid. A close station spacing (5-6m) was found necessary in view of the peculiar geology and the magnetic properties of rocks described above. Observations were made only on relatively magnetic quiet days, which are rare in these parts. Longer profiles were not possible because of (i) very rugged, uneven topography and (ii) numerous water bodies with meltwater accumulating in the troughs. A Portable Proton Precession magnetometer (Geometries G 816/826 A) with an accuracy of 1.0 nT was used for the field measurements. Another Proton Precession magnetometer (NGRI 600 R), also with 1.0 nT accuracy, was continuously run at Maitri coupled to a poly-chart recorder (T0A ETR 200 A) for monitoring the diurnal variation of the earths total magnetic field. Completed Dr. Madhu Sudan Joshi National Centre for Polar and Ocean Research (NCPOR) 8322525515 Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND ictd@ncpor.res.in Principal investigator Earth Science-Solid Earth Theme Queen Maud Land Antarctic Place Delineation of Tectonic Features of Schumacher Oasis Project English 20.0 140.0 -90.0 30.0 1993-01-01 1994-12-31 TableDigital unknown unknown Mr. Sakthivel Samy V National Centre for Polar and Ocean Research (NCPOR) +91-832-2525515 Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND vssamy@ncpor.res.in Distributor http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF870417918&userType=user&freeTextValue=Delineation+of+Tectonic+Features+of+Schumacher+Oasis%2C+East+Antarctica+Using+Total+Field+Geomagnetic+Profiling.