Abstract
The age of the Ashburton Province, comprising an older divergent‐margin megasequence and a younger convergent‐margin megasequence, is poorly constrained. The Boolaloo Granodiorite, which intruded the divergent‐margin megasequence on the western margin of the Ashburton Province, has given a SHRIMP zircon U–Pb age of 1786 ± 5 Ma, and therefore post‐dates convergent‐margin, backarc basin sequences, with established conventional zircon U7sbnd;Pb ages of ca 1843–1828 Ma. However, it pre‐dated deformation of convergent‐margin, remnant‐ocean sequences. Similarly aged (ca 1797–1791 Ma) granitoids are present in the adjacent Gascoyne Province, thereby identifying a magmatic fold‐thrust belt that abutted a remnant ocean in the Ashburton Province.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
