Publication Name: AEGC 2021
Authors: Karen Connors, Janelle Simpson, Dominic Brown
Date Published: September 2021
Number of Pages: 8
Abstract:
Interpretation of the nature and extent of basement rocks in many regions is hampered by lack of exposure and because potential field data tend to reflect the signatures of overlying upper crustal units, highlighting the need for tools that image deeper. In Northwest Queensland (NWQ) numerous crustal-scale seismic lines were collected from 1994 to 2019 within the eastern North Australia Craton. Although multiple interpretations have been published for some lines, definition of the underlying basement terranes has remained elusive. This project presents a new understanding of the basement terranes that form the fundamental building blocks of the Mount Isa region based on crustal-scale interpretation of all the major seismic lines, integrated with magnetotellurics and tomography, in the mid to lower crust. Surface geology and potential field data helped constrain the upper crustal interpretation.