Journal
PRECAMBRIAN RESEARCH
Volume 318, Issue -, Pages 156-169Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.precamres.2018.09.006
Keywords
Provenance; Capricorn Orogen; Intracratonic rift basin; Musgrave Orogeny; Ngaanyatjarra Rift
Categories
Funding
- Distal Footprints Research Program - Science and Industry Endowment Fund (SIEF)
- Minerals Research Institute of Western Australia (MRIWA) UNCOVER Australia Project [RP04-063]
Ask authors/readers for more resources
Intracontinental rifting of the Capricorn Orogen was accompanied by the emplacement of mafic intrusions at c. 1080 Ma, contemporaneous with deposition of siliciclastic and volcanoclastic sediment in the late Mesoproterozoic Collier Basin. In this work we investigate the provenance of the Collier Basin sediment with U-Pb and trace elements data for detrital zircons. Visual inspection of age data signature and statistical Kolmogorov-Smirnov similarity test integrated with trace element analysis of detrital zircon suggest that the Collier Basin contains two distinct sequences, in terms of sedimentary provenance and depositional history. The basal units of the Collier Basin were deposited in a deltaic setting, and are dominated by early to middle Palaeoproterozoic detrital zircon ages matching older sedimentary rocks on the south margin of the Pilbara Craton (Ashburton and Capricorn Groups), and underlying Mesoproterozoic sedimentary sequences in the central Capricorn Orogen (Edmund Basin). The topmost sequence of the Collier Basin contains unimodal late Mesoproterozoic detrital zircon populations (1300-1100 Ma) interpreted to be associated with the Musgrave Province from central Australia, similar to 1000 km distant. The sediment transport of the topmost unit occurred via marine conduit in a rift environment, with its axis elongated from southeast to northwest. The data indicate that rifting within the Capricorn Orogen is linked with the 1090-1040 Ma intracontinental Ngaanyatjarra Rift of central Australia, which is interpreted to have facilitated dispersal of Musgrave Province detritus between Western Australia and central Australia.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available