Tectonic stress regime recorded by zircon Th/U

Detrital zircon geochronology is a powerful tool for investigating sedimentary provenance, but U-Pb zircon ages alone cannot distinguish between source terranes with similar age signatures. We integrate recent developments in petrochronology with sedimentary provenance analyses by investigating the...

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Bibliographic Details
Published in:Gondwana research 2018-05, Vol.57, p.1-9
Main Authors: McKay, Matthew P., Jackson, William T., Hessler, Angela M.
Format: Article
Language:English
Subjects:
Detrital zircon
Petrochronology
Stratigraphy
Tectonics
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Summary:Detrital zircon geochronology is a powerful tool for investigating sedimentary provenance, but U-Pb zircon ages alone cannot distinguish between source terranes with similar age signatures. We integrate recent developments in petrochronology with sedimentary provenance analyses by investigating the relationship between tectonic stress regime and zircon Th/U. In the North American Cordillera, zircons that formed in melts associated with extensional magmatism contain variable Th/U (0.3 to >3.5), including significant zircon populations with Th/U >1.0, whereas zircons that crystallized from compressional magmatism exhibit low variability and low Th/U (
ISSN:1342-937X
1878-0571
DOI:10.1016/j.gr.2018.01.004