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Hierarchical classification and vector ordination in the distinction of limestones in the Fairfield Group Canning Basin, Western Australia

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Created 20/01/2025

Updated 20/01/2025

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The existence of two Formations, the Laurel and Gumhole, in the Upper Devonian to Lower Carboniferous Fairfield Group from the Lennard Shelf in the Canning Basin has been established during field studies and confirmed using a multivariate analysis based on petrographic and geochemical data. Limestones of the Gumhole Formation are generally characterised by a dominance of either ooids or brachiopods, or the presences of bryozoa, as well as higher levels of Mn, Fe, Pb, Zn and the ratio Ca/Mg than are present in the limestones of the Laurel Formation, which are characterised by the presence of either pelecypods or silt, and higher levels of Mg, Sr, and the ratio Sr/ Ca. For the study, two representative groups of limestones from these formations were analysed. The analysis involved a taxonometric technique incorporating classification, ordination and diagnostic programs, and utilized in all 19 petrographic and 14 geochemical attributes. In both groups, at least 74 per cent of the samples were successfully differentiated on the criteria presented.

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Title Hierarchical classification and vector ordination in the distinction of limestones in the Fairfield Group Canning Basin, Western Australia
Language eng
Licence Not Specified
Landing Page https://devweb.dga.links.com.au/data/dataset/54f4cc6b-31a9-4c10-9e85-c45f9ade30ee
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
Data Portal Data.gov.au