Publication Name: Australasian Exploration Geoscience Conference 2019
Authors: Dennis Arne*, Simon Dörling, Robert Fagan, Heather Middleton
Date Published: September 2019
Number of Pages: 6
Abstract:
The Pillara Zn-Pb deposit is located on the northeast margin of the Canning Basin, Western Australia where it is hosted by a series north-northeast-trending, en echelon, conjugate normal faults that bound a central graben plunging gently to the northeast. Kinematic indicators on all fault surfaces indicate dominantly dip-slip movement. Extension increases from approximately 15% in the south to as much as 50% in the north of the graben structure. The complex array of faults is consistent with development in a northwest-southeast directed extensional stress field with a vertical s1 prior to minor tilting of the sequence to the northeast. Northwest-southeast extension was localised within a northeast-trending transfer structure.