POST-RIFT TECTONIC SUBSIDENCE AND PALAEO-WATER DEPTHS IN THE NORTHERN CARNARVON BASIN, WESTERN AUSTRALIA

• DOI: 10.1071/aj00017
• Publication Date: 2017-08-21T23:42:18Z
• Authors: A.R. Kaiko; A.M. Tait
• Keywords: Tectonic subsidence; Thermal subsidence; Hydrocarbon exploration

The subsidence history of the Northern Carnarvon Basin has been dominated by simple thermal sag following creation Exmouth, Barrow and Dampier Sub-basins Early to Middle Jurassic rifting. This conclusion follows from recognition vitrinite reflectance suppression, which removes need for recent heating events, use seismic stratigraphy, rather than only palynology micro-palaeontology, determine palaeo-water depths.The thermal-sag model, related rifting, accounts post-rift sedimentary architecture Basin, especially in areas sediment starvation. It also implications timing hydrocarbon generation reconstruction migration pathways. work re-emphasised theoretical possibility determining depths adjusting one-dimensional basin models fit tectonic curves.Miocene uplift, order several hundred metres, caused local inversion, accentuated some preexisting structures re-activated faults causing remigration, but otherwise not affected sediments.