Continuation of the New England Orogen, Australia, beneath the Queensland Plateau and Lord Howe Rise.

Mortimer, N., Hauff, Folkmar and Calvert, A. T. (2008) Continuation of the New England Orogen, Australia, beneath the Queensland Plateau and Lord Howe Rise. Australian Journal of Earth Sciences, 55 . pp. 195-209. DOI 10.1080/08120090701689365.

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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.

Document Type: Article
Keywords: geochemistry, Lord Howe Rise, New England Orogen, Ocean Drilling Program, petrology, potassium-argon dating, Queensland Plateau, Strontium isotopes
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1080/08120090701689365
ISSN: 0812-0099
Projects: ODP, Future Ocean
Date Deposited: 03 Dec 2008 16:52
Last Modified: 31 May 2016 14:03
URI: http://oceanrep.geomar.de/id/eprint/6919

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