URL: https://geoscience.data.qld.gov.au/dataset/cr149418
This Technical Note report provides an overview of the background, input datasets, work conducted, and the output GIS datasets produced.
Recently acquired airborne geophysical data revealed that the Mary Kathleen Domain has a much more complex internal structure than previously described in the GSQ detailed geology. This project involved data compilation, geophysical interpretation, and field validation to produce a GIS dataset for the Roseby Belt in the context of a new structural framework for the Mary Kathleen Domain.
The Roseby Belt is a mineralised structural feature in the eastern part of the Mary Kathleen Domain that is herein divided into several hierarchical structural features: 1) The Pinnacle Fault Zone that separates the Roseby Belt from the Wonga Belt and LCGB to the west; 2) Lady Clayre- Knapdale Low-Strain Zone; and 3) the Mount Rose Bee Fault Zone, which separates the Roseby Belt from the Boomarra Domain to the east.
Faulting, inferred from the alignment of discontinuities and truncations in the geophysics, is considered to be much more important in the Mary Kathleen Domain than previous studies have suggested. Most previously mapped faults were restricted to either syn-sedimentary growth faults or late- to post-orogenic wrench faults, whereas this study recognises the significant contribution of bedding-parallel faulting, for example by flexural slip along rheological discontinuities such as bedding planes and decollement/s during folding.
The work emphasises the important role of fault reactivation and bulk transpressional deformation within the Roseby Belt and throughout the Mary Kathleen Domain through coeval slip on NW-NNW and NE-NNE striking fault systems during the Isan Orogeny and mineralisation.
Bibliographic reference: Hoy D., 2024. Structure of the Roseby Belt. GSQ Technical Notes 2024/01.
ISSN: 2206-0340.
ISBN: 978-1-9256-0951-6