Authors / CoAuthors
Claoue-Long, J.C. | Edgoose, C.
Abstract
The thermal event represented by the S-type Ngadarunga Granite in the western Arunta Region is constrained at 1803 ± 6 Ma from the crystallisation age of metamorphic zircon within adjacent Lander Package metasedimentary rocks. The granite crystallised no magmatic zircon, but does contain abundant inherited zircons whose age spectrum matches that of detrital grains in the adjacent partially melted sedimentary rocks. This provides the oldest age constraint on deformation in the Arunta Region, and on the region-wide unconformity separating the Lander Package from overlying Reynolds Range Group. Detrital zircon grains in the Lander Package were derived from a provenance dominated by 1840-1880 Ma crystalline rocks, inferring that the Arunta Region was a basin marginal to earlier continental crust of that age during deposition of the Lander basin phase.
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nonGeographicDataset
eCat Id
64140
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Keywords
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- External Publication
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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_Internal
Publication Date
2006-03-24T00:00:00
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geoscientificInformation
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[-23.0, -22.0, 130.5, 132.0]
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