Authors / CoAuthors
Richards, J.R. | White, D.A. | Webb, A.W. | Branch, C.D.
Abstract
This study arose out of the regional geological mapping of the Cairns Hinterland which was begun in 1956 as a joint undertaking by the Bureau of Mineral Resources and the Geological Survey of Queensland. It is another unit in the series of dating surveys stemming from the co-operation between the Australian National University and the Bureau of Mineral Resources. One of us (D.A.W.), assisted by F. de Keyser, was responsible for the supervision of the field operations connected with this study; another (C.D.B.) was concerned with the general investigation of these acid igneous rocks; the others (J.R.R. and A.W.W.) were assisted by J. A. Cooper in the production of the K-Ar results. We are indebted to W. Compston and M. J. Vernon for permission to publish the Rb-Sr results on the Palaeozoic rocks, and for assistance with measurements on the Croydon Volcanics. Samples were chosen with the aim of defining more closely the time limits of the two periods of activity that were thought to have produced the granites and acid volcanic rocks now covering about half the area. Regional mapping evidence had already suggested that a Precambrian age for the older granites was a reasonable possibility, and that the second event took place in the late Palaeozoic. Fossils collected by the mapping parties suggested that these periods were pre-Upper Ordovician and late Devonian/Carboniferous to Permian/Triassic (White, 1961). The present set of age data offers a most gratifying confirmation of some of these conclusions and provides a basis for the selection of samples for further study.
Product Type
document
eCat Id
190
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
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- GA PublicationBulletin
- ( Theme )
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- geology
- ( Theme )
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- metamorphism
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- AU-QLD
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1966-01-01T00:00:00
Creation Date
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Purpose
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unknown
Topic Category
geoscientificInformation
Series Information
Bulletin 088
Lineage
Unknown
Parent Information
Extents
[-17.0, -16.0, 145.5, 147.0]
Reference System
Spatial Resolution
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Associations
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