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Palaeomagnetic Results from the Gordon Subgroup of Tasmania: Further Evidence for a Late Cretaceous Magnetic Overprint in Southeastern Australia
Citation
Sharples, C and Klootwijk, CT, Palaeomagnetic Results from the Gordon Subgroup of Tasmania: Further Evidence for a Late Cretaceous Magnetic Overprint in Southeastern Australia, Royal Society of Tasmania, Hobart. Papers and Proceedings, 115 pp. 85-91. ISSN 0080-4703 (1981) [Refereed Article]
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Copyright Statement
Copyright 1981 Royal Society of Tasmania
Official URL: http://www.rst.org.au/publications.html
Abstract
A thermal demagnetization study of 48 limestone samples from the Ordovician Gordon Subgroup of Ida Bay (Tasmania), indicated complete remagnetization (D = 9 .4° , I= - 81 . 4°,k = 137.5, a95 = l . 3o, N = 92 South pole position 59.8°5 1 41.1°E, dp = 2 . 4°, dm = 2 . 5°)during Late Cretaceous or less likely Early Tertiary time . This finding further supports a recently recognized Late Cretaceous remagnetization event in southeastern Au stral ia ,which is attributed to r ift forming processes preceding the opening of t he Tasman Sea.
Conodont colour indicates that the limestones studied have not been subjected to temperatures in e xcess of l00°c . This suggests a possible widespread occurrence of this magnetic overprint.
Item Details
Item Type: | Refereed Article |
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Research Division: | Environmental Sciences |
Research Group: | Environmental management |
Research Field: | Environmental management |
Objective Division: | Environmental Management |
Objective Group: | Management of Antarctic and Southern Ocean environments |
Objective Field: | Assessment and management of Antarctic and Southern Ocean ecosystems |
UTAS Author: | Sharples, C (Dr Chris Sharples) |
ID Code: | 71416 |
Year Published: | 1981 |
Deposited By: | Geography and Environmental Studies |
Deposited On: | 2011-07-18 |
Last Modified: | 2012-06-28 |
Downloads: | 1 View Download Statistics |
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