Continuation of the New England Orogen, Australia, beneath the Queensland Plateau and Lord Howe rise
Australian Journal of Earth Sciences
By: N. Mortimer, F. Hauff, and A.T. Calvert
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Abstract
Greywacke, argillite, greyschist and hypabyssal igneous rocks have been obtained from an Ocean Drilling Program core on the Queensland Plateau and from xenoliths in a volcanic breccia dredged from the crest of the Lord Howe Rise. Low to intermediate detrital quartz contents, 260-240 Ma K-Ar ages, and only moderately radiogenic Sr and Nd isotope compositions, suggest a correlation with the New England Orogen of eastern Australia, rather than with Australia's Lachlan Orogen or other adjacent geological provinces. Our results indicate that the New England Orogen terranes continue towards New Zealand at least as far as the southern Lord Howe Rise. The projected offshore boundaries of the major east Australian orogens are now known with more confidence, and do not appear to require any major cross-orogen offsets.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Continuation of the New England Orogen, Australia, beneath the Queensland Plateau and Lord Howe rise |
| Series title | Australian Journal of Earth Sciences |
| DOI | 10.1080/08120090701689365 |
| Volume | 55 |
| Issue | 2 |
| Year Published | 2008 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Australian Journal of Earth Sciences |
| First page | 195 |
| Last page | 209 |
| Google Analytic Metrics | Metrics page |