Abstract
Abstract Mineralogically complex shale horizons interbedded with, and underlying, the Brockman Iron Formation at Mt Tom Price, Western Australia, are compared with equivalent sections at Wittenoom and Yampire Gorge. Despite the alteration by fairly intense post‐depositional folding, faulting and weathering, very limited evidence favouring a primary pyroclastic source is indicated. By acting as effective seepage horizons for percolating meteoric waters, the upturned shale bands, which are part of the truncated synclinal folds in the Brockman Formation, have actively promoted supergene enrichment of the iron ore during lateritization and have themselves undergone considerable mineralogical reconstitution. By means of semi‐quantitative mineralogical data from samples in a reconstructed weathering profile, it is postulated that the formation at Mount Tom Price was subjected to two periods of lateritization separated by a period of diagenesis. Of these cycles the first was probably the most intense and hence r...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.