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Geochronological and lead-isotope evidences for rapid crust formation in middle-proterozoic time: The Labrador exampleExtensive U-Pb geochronological studies in the Grenville and Makkovik provinces have shown that eastern Labrador is underlain by two distinct crustal blocks. In order to substantiate the juvenile character of the middle-Proterozoic crustal block, the isotopic compositon of lead in leached k-feldspars from the same rocks were analyzed. The results of the analysis are briefly discussed.
Document ID
19880020855
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schaerer, Urs
(Quebec Univ. Montreal Quebec, Canada)
Date Acquired
September 5, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Lunar and Planetary Inst., Workshop on the Growth of Continental Crust
Subject Category
Geophysics
Accession Number
88N30239
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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