The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis
Open-File Report
2007-1047-SRP-063
By: L. Federico, G. Capponi, L. Crispini, and J.D. Bradshaw
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Abstract
In the Cambrian, the paleo-Pacific margin of the Gondwana supercontinent included East Antarctica,
Australia, Tasmania and New Zealand and was affected by themajor Ross-Delamerian Orogeny. In Antarctica,
evidence suggests that this resulted from oblique subduction and that in northern Victoria Land it was accompanied by
the opening and subsequent closure of a back-arc basin. Comparison of the type and timing of sedimentary, magmatic
and metamorphic events in areas noted above shows strong similarities between northern Victoria Land and New
Zealand. In both regions Middle Cambrian volcanites are interpreted as arc/back-arc assemblages produced by west-directed subduction; sediments interbedded with the volcanites show provenance both from the arc and from the
Gondwana margin and therefore place the basin close to the continent. Back-arc closure in the Late Cambrian was
likely accomplished through a second subduction system
Suggested Citation
Federico, L., Capponi, G., Crispini, L., and Bradshaw, J., 2007, The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis: U.S. Geological Survey Open-File Report 2007-1047-SRP-063, 5 p., https://doi.org/10.3133/ofr20071047SRP063.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis |
| Series title | Open-File Report |
| Series number | 2007-1047-SRP-063 |
| DOI | 10.3133/ofr20071047SRP063 |
| Year Published | 2007 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 5 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007 |
| Other Geospatial | Antarctica;Victoria Land |
| Additional Online Files (Y/N) | N |