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Proterozoic intrusive breccia bodies near Duchess, northwestern Queensland

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Created 20/01/2025

Updated 20/01/2025

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Several breccia bodies consisting of randomly oriented angular to rounded fragments of locally derived amphibolite-grade metamorphic rocks dispersed in an igneous-textured pink matrix occur in the southern part of the Proterozoic Mount Isa Inlier, where they have been mapped as Mount Philp Breccia. The fragments in the breccia can be matched with rocks in the adjacent Corella Formation, a unit of mainly calc-silicate rocks. The breccia matrix contains stubby phenocrysts of tremolite and small miarolitic cavities set in a ground mass of interlocking albite laths. The breccia bodies postdate the deformation and metamorphism of the enclosing Corella Formation, and are thought to fill pipes and fissures formed by explosive releases of pressure during intrusion of magma into calc-silicate rocks at depth.

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Title Proterozoic intrusive breccia bodies near Duchess, northwestern Queensland
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/962867f7-3780-4aa4-abcf-e5b143452c21
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[139.5, -21.5], [140.5, -21.5], [140.5, -20.6], [139.5, -20.6], [139.5, -21.5]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "Proterozoic intrusive breccia bodies near Duchess, northwestern Queensland". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/proterozoic-intrusive-breccia-bodies-near-duchess-northwestern-queensland