Authors / CoAuthors
Blake, D.H.
Abstract
Correlations within the Proterozoic succession are complicated by repetitions of similar rock types at different stratigraphic levels, especially acid and basic volcanics, quartz sandstones, and calcareous rocks, and also by disconformities, igneous intrusions of various ages, tight to isoclinal folding, intense faulting, regional metamorphic effects, and scarcity of reliable isotopic age data. Consequently, there is plenty of scope for alternative interpretations. The interpretation proposed is that instead of equivalent sequences of cover rocks, known as the western and eastern successions, being separated by a narrow basement belt, as suggested previously for the Proterozoic Mount Isa Inlier, the oldest cover rocks in the west, those of the Haslingden Group, pre-date the eastern succession, and basic lavas (Eastern Creek Volcanics) within this group have no correlatives to the east. It is also suggested that volcanics previously regarded as part of the basement (Magna Lynn Metabasalt and Argylla Formation) are younger than most of the Haslingden Group, and that the extensive calcareous Corella Formation represents at least two quite separate units, one being younger than the Haslingden Group, and one being part of the underlying basement. These suggestions are consistent with U-Pb zircon dating carried out to date, as well as with the field evidence.
Product Type
nonGeographicDataset
eCat Id
81047
Contact for the resource
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
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
1980-01-01T00:00:00
Creation Date
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unknown
Topic Category
geoscientificInformation
Series Information
BMR Journal of Australian Geology and Geophysics 5:4:243-256
Lineage
Unknown
Parent Information
Extents
[-22.5, -17.0, 138.0, 141.0]
Reference System
Spatial Resolution
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Associations
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Source data not available.