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Magnetic investigations of the junction between Wilson and Bowers terranes (northern Victoria Land, Antarctica)

Published online by Cambridge University Press:  12 May 2004

Emanuele Bozzo
Affiliation:
Dipartimento Scienze della Terra, Università di Genova, Viale Benedetto XV 5, 16132 Genova, Italy
Giorgio Caneva
Affiliation:
Dipartimento Scienze della Terra, Università di Genova, Viale Benedetto XV 5, 16132 Genova, Italy
Giovanni Capponi
Affiliation:
Dipartimento Scienze della Terra, Università di Genova, Viale Benedetto XV 5, 16132 Genova, Italy
Alessandro Colla
Affiliation:
Dipartimento Scienze della Terra, Università di Genova, Viale Benedetto XV 5, 16132 Genova, Italy

Abstract

A magnetic survey was carried out in the area between Lady Newnes Bay and Evans Névé (northern Victoria Land), to ascertain whether the contact between the Wilson and the Bowers terranes could be identified remotely. The survey consisted of three ground and 12 helicopter-borne profiles. The method was calibrated on the southernmost profiles, which cover a well-exposed section of the contact between the Wilson and Bowers terranes. The northern profiles were located in an area where the contact is poorly constrained by outcrops, so that it could be tested whether the junction displays a magnetic signature. The magnetic data and the 2.5-D modeling of three selected profiles indicate that no easily recognizable magnetic signature defines this contact. The main features of the area are magnetic anomalies probably controlled by the “Meander Intrusives” and the McMurdo volcanic rocks, both characterized by high susceptibility values. If an anomaly related to the contact exists, then it is probably masked by these stronger anomalies.

Type
Papers—Earth Sciences and Glaciology
Copyright
© Antarctic Science Ltd 1995

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