Reconstructing deep‐time histories from integrated thermochronology: An example from southern Baffin Island, Canada

• Published in: Terra Nova
• Main Authors: McDannell, Kalin T., Schneider, David A., Zeitler, Peter K., O'Sullivan, Paul B., Issler, Dale R.
• Other Authors: Natural Resources Canada, Lehigh University
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2019
• Subjects: Baffin Island; Baffin
• Online Access: http://dx.doi.org/10.1111/ter.12386; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fter.12386; https://onlinelibrary.wiley.com/doi/pdf/10.1111/ter.12386; https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ter.12386

Abstract We present a multi‐chronometric approach for reconstructing deep‐time thermal histories using southern Baffin Island as a case study. This continuous thermal history begins with the Palaeoproterozoic Trans‐Hudson Orogeny and is derived from inverse and forward models that integrate thermochronometers spanning some 500°C: new apatite U–Pb ages and K‐feldspar 40 Ar/ 39 Ar multi‐diffusion domain data, published (U–Th)/He zircon ages and new multi‐kinetic fission‐track results. Integration of data from a wider temperature range reduces ambiguities in thermal‐history modelling and permits us to constrain the timing of geological processes including, extended post‐orogenic cooling, enhanced later Proterozoic cooling, and then episodic burial and exhumation in the Palaeozoic–Mesozoic.