Within the Italian Antarctic research programme repeated GPS-measurements are being carried out at well installed points in the area of Northern-Victoria-Land (NVL), Antarctica, called VLNDEF: Victoria Land Network for Deformation Control. Although the deformations obtained over a period of 4 years are quite small we consider micro-gravity measurement a suitable complement for geodynamic research. Since the German Federal Institute for Geosciences and Natural Resources (BGR) is active in that area as well, until the year 2010 performing nine expeditions comprising geological and geophysical work, we used the offer to join expedition GANOVEX X during the season 2009/2010. With three gravimeters 13 points of the Italian network near the German station Gondwana were observed. The advantage of such measurements is that they do not require topographic corrections. Thus, the instrumental resolution and the measurement conditions, resp., are the limits for the resolution and accuracy of the measurements. In order to receive a reliable data base we used three well calibrated gravimeters in parallel and repeated the measurements several times. Local effects due to changes of the ice cover and snow fall are below the achieved measurement accuracy, because the points are so exposed that local effects are negligible. Although the elevation differences up to more than 2,700 m are quite strong, the results reveal the feasibility of these measurements in that area: The obtained standard deviations are in the order of ±10 to ±20 μGal.

G.Jentzsch, R.Ricker, A.Weise, A.Capra, M.Dubbini, A.Zanutta (2014). Micro-gravity measurements in northern Victoria-Land, Antarctica:a feasability study. Berlin, Heidelberg DEU : C.Rizos, P.Willis [10.1007/978-3-642-37222-3_57].

Micro-gravity measurements in northern Victoria-Land, Antarctica:a feasability study

DUBBINI, MARCO;ZANUTTA, ANTONIO
2014

Abstract

Within the Italian Antarctic research programme repeated GPS-measurements are being carried out at well installed points in the area of Northern-Victoria-Land (NVL), Antarctica, called VLNDEF: Victoria Land Network for Deformation Control. Although the deformations obtained over a period of 4 years are quite small we consider micro-gravity measurement a suitable complement for geodynamic research. Since the German Federal Institute for Geosciences and Natural Resources (BGR) is active in that area as well, until the year 2010 performing nine expeditions comprising geological and geophysical work, we used the offer to join expedition GANOVEX X during the season 2009/2010. With three gravimeters 13 points of the Italian network near the German station Gondwana were observed. The advantage of such measurements is that they do not require topographic corrections. Thus, the instrumental resolution and the measurement conditions, resp., are the limits for the resolution and accuracy of the measurements. In order to receive a reliable data base we used three well calibrated gravimeters in parallel and repeated the measurements several times. Local effects due to changes of the ice cover and snow fall are below the achieved measurement accuracy, because the points are so exposed that local effects are negligible. Although the elevation differences up to more than 2,700 m are quite strong, the results reveal the feasibility of these measurements in that area: The obtained standard deviations are in the order of ±10 to ±20 μGal.
2014
Earth on the Edge: Science for a Sustainable Planet
429
434
G.Jentzsch, R.Ricker, A.Weise, A.Capra, M.Dubbini, A.Zanutta (2014). Micro-gravity measurements in northern Victoria-Land, Antarctica:a feasability study. Berlin, Heidelberg DEU : C.Rizos, P.Willis [10.1007/978-3-642-37222-3_57].
G.Jentzsch; R.Ricker;A.Weise; A.Capra; M.Dubbini; A.Zanutta
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/320917
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