Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/33900

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Title
Early plaeozoic subduction in the southeastern Lachlan Fold Belt, Batemans Bay, New South Wales
Author/Creator
Prendergast, E. I.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences
Description
The southeastern Lachlan Fold Belt at Batemans Bay on the New South Wales south coast is an accretionary complex with a prolonged deformation history. Early features include synsedimentary folds, mélange, disaggregated bedding and faults. Fabrics within the clast-in-matrix mélange and mudstone match those found in cores from the lower slopes of modern accretionary prisms. At the toe of the accretionary prism, the contact between the craton-derived Adaminaby Group and ocean floor deposits of the Wagonga Group is conformable. As subduction continued, the early structures were overprinted by (D₁) deformation that produced meridional north - south-trending, tight to isoclinal folds (F₁) and associated axial-plane cleavage (S₁). This west-dipping subduction occurred in the Late Ordovician/Early Silurian but probably began much earlier. A younger regional deformation (D₂) resulted in north - south-trending, open to tight folds (F₂), slightly oblique to F1, and an axial-surface cleavage (S₂).
Relation
Australian Journal of Earth Sciences Vol. 54, Issue 4, p. 481-501
Publisher Link
http://dx.doi.org/10.1080/08120090600981475
Date
2007
Publisher
Taylor & Francis
Keyword(s)
accretion;  Adaminaby Group;  Batemans Bay, N.S.W.;  Lachlan Fold Belt;  mélange;  subduction;  thrust faults;  Wagonga Group
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/33900
Identifier
ISSN:0812-0099
Reviewed
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Subject
"Australian Journal of Earth Sciences"
 
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