Deep crustal architecture of northwest Queensland: results from the 2025 Boodjamulla–Croydon Seismic Survey (L216)

Geological Survey of Queensland, Brisbane, Australia

Geoscience Australia, Canberra, Australia

Overview
The 2025 Boodjamulla–Croydon Seismic Survey (L216) acquired 841 km of deep crustal reflection data across three transects in northwest Queensland, imaging crustal architecture across the northern portion of the Mount Isa Province and into the Georgetown Inlier. The survey was co-funded by the Queensland Government and the Australian Government’s Resourcing Australia’s Prosperity initiative.

The three transects target key outstanding problems in the region’s deep crustal framework: the geometry of the Gidyea Suture Zone and Rowe Fossil Subduction Zone along the Mount Isa–Georgetown boundary; the crustal architecture beneath the Lawn Hill Platform and its relationship to SEDEX-style Pb–Zn mineralisation. A dual day/night acquisition design yielded purpose-built deep crustal and near-surface datasets from a single continuous receiver layout, alongside a passive ambient noise dataset.

This workshop presents first-pass interpretations of the final processed data alongside supporting datasets.

What are the learning outcomes?
Seismic acquisition and interpretation practices applied to deep crustal architecture and mineral systems of the northern Mount Isa Province.

Who should attend?
Explorers and researchers