Authors / CoAuthors
Ellis, D.J. | Wyborn, L.A.I.
Abstract
The Precambrian Mount Isa Inlier in northwest Queensland is extensively cut by numerous dolerite intrusions. At least two distinct episodes of dolerite intrusion have been recognised in each of the three major tectonic units: the western succession, basement sequence, and eastern succession. Olivine and quartz tholeiites predominate. The rocks in the western succession and basement sequence display little chemical variation with time. Those of the eastern succession display greater chemical variations. The most likely present-day tectonic analogue is that of an intracontinental rift. There is no evidence in the composition of the mafic igneous rocks to suggest that they were formed in a subduction-related environment such as an island arc or continental margin.
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document
eCat Id
81168
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
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- GA PublicationJournal
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- QLD
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1984-01-01T00:00:00
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geoscientificInformation
Series Information
BMR Journal of Australian Geology and Geophysics 9:1:19-32
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Unknown
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[-22.26, -18.47, 138.54, 141.36]
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