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Cooling and exhumation of the Shuswap Metamorphic Core Complex constrained by 40 Ar/ 39 Ar thermochronology

Vanderhaeghe, Olivier; Teyssier, Christian; McDougall, Ian; Dunlap, William James

Description

The exhumation history of the Shuswap Metamorphic Core Complex (Shuswap MCC) is deciphered from structural analysis and 40Ar/39Ar thermochronology. With the exception of a few samples contaminated by excess argon, the analytical results indicate a consistent range of early Tertiary 40Ar/39Ar ages throughout the area. Hornblende yields ages ranging from ∼59-54 Ma; muscovite and biotite ages are clustered between 49.5 and 48 Ma, and are consistent with the timing of closure of K-feldspars,...[Show more]

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
URI: http://hdl.handle.net/1885/87896
Source: Geological Society of America Bulletin
DOI: 10.1130/0016-7606(2003)115<0200:CAEOTS>2.0.CO;2

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