This is a review of an interesting extended abstract presented at the AEGC Conference held in Brisbane in 2023.
Geometry of the margins of the North Australian Craton and correlations with upper crustal structures Authors: Fatemeh Amirpoorsaeed, Peter Betts, Anindita Samsu, Robin Armit, Alexander Cruden.
Craton margins:
- Craton margins are dipping discontinuities, wedge-shaped crustal and lithospheric geometries where younger, weaker rocks collide with stronger, older craton rocks.
- They can be found in locations with high topography, higher metamorphic grade, and boundaries or transitions in lithospheric geometry found in geophysical data.
- There are two types of craton margins, inward dipping and outward dipping.
- Craton margins can be structurally complex because they may record multiple episodes of extension and inversion that can reactivate pre-existing structures.
- The structures associated with craton margins act as pathways for fluid migration and circulation in the crust, contributing to mineral endowment.
