Approaches and best practices for dating orogenic processes using 40Ar/39Ar geochronology

Kellett, Dawn A.; Warren, Clare J. and Camacho, Alfredo (2024). Approaches and best practices for dating orogenic processes using 40Ar/39Ar geochronology. In: Shellnutt, J. Gregory; Denyszyn, Steven W. and Suga, Kenshi eds. Methods and Applications of Geochronology. Elsevier, pp. 367–400.

DOI: https://doi.org/10.1016/B978-0-443-18803-9.00008-0

Abstract

The accumulation and transfer of argon (Ar) within minerals, rocks, and fluids in response to diverse metamorphic, deformation, and fluid histories makes 40Ar/39Ar geochronology attractive for investigating and constraining orogenic (mountain building) processes. There are many 40Ar/39Ar analytical approaches that can be used to explore these processes. The objective of this chapter is to provide an overview of Ar sources and mobility in rocks, lay out best practices for designing a 40Ar/39Ar study in an orogenic setting, and describe some of the most commonly used methods and interpretational tools available. Brief case studies are used to illustrate these concepts.

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