Authors / CoAuthors
Jackson, M.J.
Abstract
Our understanding of the geological history and evolution of many parts of Australia is at the reconnaissance level. This is true to a large extent for much of the Proterozoic of North Australia. We have reasonably good 1:250,000 scale geological maps {and in small parts even better 1:100,000 maps} which show the distribution of rock units and the broad structural features of the exposed sequences. However, in most areas we only have rudimentary ideas on tectonic setting and geological evolution because of a lack of isotopic dating and detailed structural and sedimentological studies. Coherent analyses of basin type, configuration, and evolution, in the framework of modern plate tectonic models, are not available for much of the North Australian Proterozoic. The information presented in this guide book results largely from detailed stratigraphic and sedimentological studies undertaken between 1977 and 1981 in the McArthur River region, supplemented by surface and drillcore studies in 1984/85 near the Roper River. Unfortunately, these more detailed studies cover only about half of the area defined as the McArthur Basin and as noted below this 'basin' is probably only part of a much larger depositional feature. Therefore, even after some detailed studies our knowledge is fragmentary and incomplete and our interpretations somewhat tentative. The results from the sedimentological studies in the McArthur River region have been compiled in detail in BMR Bulletin 220 {Jackson & others, in press}. We had hoped that this would be available for the excursion; unfortunately, this has not been possible. As there is no other satisfactory synthesis of this information we have condensed and summarised relevant parts of it and included these in the guide book. A 1:100,000 scale geological map of the area containing most of the localities we shall visit is included with this guide book.
Product Type
nonGeographicDataset
eCat Id
22124
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
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2601
Australia
Keywords
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- GA PublicationConference Paper
- ( Theme )
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- sedimentology
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- AU-NT
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1986-01-01T00:00:00
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geoscientificInformation
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