Universität zu Köln

Strub, E., Wiesel, H., Delisle, G., Binnie, S. A., Liermann, A., Dunai, T. J., Herpers, U., Dewald, A., Heinze, S., Christl, M. and Coenen, H. H. (2015). Glaciation history of Queen Maud Land (Antarctica) - New exposure data from nunataks. Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms, 361. S. 599 - 604. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1872-9584

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Abstract

Terrestrial cosmogenic nuclide exposure ages for the Wohlthat Massif (Antarctica), have previously been determined. This was done with Be-10 and Al-26 measurements by accelerator mass spectrometry (AMS) at the AMS facility at the ETH Zurich. In order to determine the extent to which the results from the Wohlthat Massif are of regional significance, additional samples were collected during the 2007 BGR-expedition Queenmet. Two of the Steingarden Nunataks (isolated mountain peaks) were chosen as sampling locations, approximately 100 km south-east of the Wohlthat Massif/Queen Maud Land, at the edge of the Polar Plateau. Quartz rich samples were collected at different elevations on the nunataks to reconstruct an elevation-dependent exposure history. The in situ produced cosmogenic nuclides Be-10 and Al-26 in these samples were measured by AMS. During sample processing the quartz separates were prepared by two different methods (Kohl and Nishiizumi, 1992, Altmaier, 2000) and measurements were performed at two different facilities (CologneAMS und Zurich AMS) to confirm the reproducibility of the results. The new results of rock surface exposure ages reveal that the exposure of the lower nunatak to cosmic radiation started between 0.65 and 1.1 Ma ago, while the more elevated regions of the second nunatak were apparently above the ice 3-4 Ma ago. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Strub, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wiesel, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Delisle, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Binnie, S. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Liermann, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dunai, T. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Herpers, U. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dewald, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Heinze, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Christl, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Coenen, H. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-389701
DOI:	10.1016/j.nimb.2015.04.052
Journal or Publication Title:	Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
Volume:	361
Page Range:	S. 599 - 604
Date:	2015
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	1872-9584
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BE-10 PRODUCTION-RATE; PRODUCTION-RATE CALIBRATION; HALF-LIFE; COSMOGENIC NUCLIDES; FIELD; ALPS Multiple languages Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38970