Authors / CoAuthors
Cross, A. | Dhnaram, C. | Lisitsin, V. | Bultitude, R.J. | Brown, D. | Purdy, D. | von Gnielinski, F.E.
Abstract
This record presents new Sensitive High Resolution Ion MicroProbe (SHRIMP) U– Pb zircon results for eighteen samples from the Cairns, Cape York and Georgetown regions in Queensland. Samples from the Cairns region comprise one granite and one microgranite. Eight samples from the Cape York region and three from the Georgetown region comprise Paleozoic igneous rocks, all but one of which are part of the Carboniferous to Permian Kennedy Igneous Association. Of particular interest are the results for two rhyolitic intrusions from the Coen Inlier that are host to gold mineralisation and gave ages of approximately 280 Ma. These results are supported by similar ages reported by Kositcin et al. (2016), also from felsic dykes spatially associated with gold mineralisation. Together, they suggest a widespread, early-Permian gold (Kungurian) event in this region. The results for two felsic dykes spatially associated with gold mineralisation much farther to the south in the Georgetown region, also gave similar early-Permian ages. The geochronology of five metamorphic rocks from the Cape York region, which were analysed in support of the Coen–Cape Weymouth geology mapping project has resulted in all samples being reassigned to other formations. The work contained in this report was carried out under the auspices of the National Collaborative Framework (NCF) between Geoscience Australia and the Geological Survey of Queensland. The data and age interpretations are also available in Geoscience Australia’s Geochronology Delivery database (http://www.ga.gov.au/geochron-sapub-web/). <b>Bibliographic Reference: </b>CROSS, A.J., DHNARAM, C., BULTITUDE, R.J., BROWN, D.D., PURDY, D.J. & VON GNIELINSKI, F.E., 2019. Summary of results. Joint GSQ–GA geochronology project: Cairns, Cape York and Georgetown regions, 2015–2016. <i>Queensland Geological Record</i> <b>2019/01</b>.
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document
eCat Id
116481
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Keywords
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- SHRIMP
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- U-Pb
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- Cairns
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- Cape York
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- Georgetown
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- rhyolitic
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- paleozoic igneous
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- Published_External
Publication Date
2023-06-05T02:06:11
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Classification - unclassified
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completed
Purpose
To publicly report geochronology results produced by GA in collaboration with the Geological Survey of Queensland
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asNeeded
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geoscientificInformation
Series Information
Queensland Geological Record 2019/01
Lineage
This work is part of an ongoing Geochronology Project, conducted by the Geological Survey of Queensland (GSQ) and Geoscience Australia (GA) under a National Collaborative Framework agreement.
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Extents
[-18.1933, -10.5719, 141.965, 147.134]
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Spatial Resolution
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