Archean mantle fragments in proterozoic crust, western Gneiss Region, Norway

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Journal Article
Year of Publication: 
2004
Authors: 
Beyer, E. E.; Brueckner, H. K.; Griffin, W. L.; O'Reilly, S. Y.; Graham, S.
Editor: 
Journal Title: 
Geology
Journal Date: 
Jul
Place Published: 
Tertiary Title: 
Volume: 
32
Issue: 
7
Pages: 
609-612
Section / Start page: 
Publisher: 
ISBN Number: 
0091-7613
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:000222490800017
LDEO Publication Number: 
Call Number: 
Key Words: 
norwegian caledonides; mantle peridotites; sulfide ages; re-os ages; archean lithospheric mantle; pressure metamorphic terranes; garnet peridotites; norwegian caledonides; lithospheric mantle; os; evolution; sulfides; systematics; ages; nd;
Abstract: 

Small volumes of garnet peridotite occur within large dunite bodies in the Western Gneiss Region of the Norwegian Caledonides. Previous Sm-Nd analyses of garnet peridotite yield Proterozoic ages close to the crystallization ages of the host gneisses. In situ (laser-ablation multicollector-inductively coupled plasma-mass spectrometry) Re-Os analysis of sulfides in the garnet peridotites gives a range of Proterozoic and Archean model ages. An Archean (2.7-3.1 Ga) protolith age is supported by whole-rock Re-Os data for sulfide-free dunites from several bodies. The Archean ages imply a melt-extraction event in the lithospheric mantle that predates the growth of the known Proterozoic upper crust in the region.

Notes: 

835NPTimes Cited:6Cited References Count:27

URL: 
<Go to ISI>://000222490800017
DOI: 
Doi 10.1130/G20366.1