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The Proterozoic Hustad igneous complex: a low strain enclave with a key to the history of the Western Gneiss Region of
 

Summary: The Proterozoic Hustad igneous complex: a low strain enclave
with a key to the history of the Western Gneiss Region of
Norway
Ha░kon Austrheim a,
1, Fernando Corfu b,1
, Inge Bryhni b,2
,
Torgeir B. Andersen a,3
a
Department of Geology, University of Oslo, P.O. Box 1047, Blindern, 0316 Oslo, Norway
b
Geological Museum, PB 1172, Blindern, 0318 Oslo, Norway
Accepted 18 October 2002
Abstract
The Hustad Igneous Complex (HIC) is a concentrically zoned, high K calc-alkaline intrusive complex, with a core of
quartz┴/monzonite and granite surrounded successively by monzodiorite and pyroxenite, preserved in a 10 km2
lens
within the strongly `caledonised' Western Gneiss Region (WGR) of Norway. Upper intercept U├/Pb zircon ages of
16549/1 and 16539/2 Ma, obtained from the granite and the monzodiorite, respectively, overlap with a Rb├/Sr whole
rock age of 16569/49 Ma (I.R.: 0.701939/0.0009, MSWD:6.6) obtained from the felsic members of the complex and a

  

Source: Andersen, Torgeir Bj°rge - Centre for Physics of Geological Processes & Department of Geosciences, Universitetet i Oslo

 

Collections: Geosciences