Jurassic-Cretaceous Sandstone Diagenesis in Eromanga Basin

Geoscience Australia data details diagenetic overprints and petrofacies of Jurassic and Lower Cretaceous sandstones in the Eromanga Basin of New South Wales. The analysis compares quartzose and volcanolithic petrofacies, reporting average core porosity of 35% and 29%, and permeability of 125 md and 676 md, respectively.

Use Cases

• Analyze porosity-permeability distribution patterns to correlate with depositional environments and bulk lithofacies characteristics.
• Model the temporal sequence of authigenic minerals, such as smectite, zeolite, and kaolinite, in volcanolithic sandstones to understand diagenetic history.
• Investigate the role of mechanically infiltrated clay cutans and authigenic chlorite grain-coatings in preserving primary porosity in quartzose sandstones.
• Compare pore-type composition, including micropores and secondary grain-dissolution pores, between volcanolithic and quartzose sandstone petrofacies.

Strengths

• Provides quantitative petrophysical data, including mean core porosity of 29% and 35% and mean permeability of 676 md and 125 md for the two petrofacies.
• Describes detailed diagenetic sequences and authigenic mineralogy for both quartzose and volcanolithic sandstone types.
• Analysis is grounded in specific geological formations: Cadna-owie, Wallumbilla, Hooray Sandstone, and Mooga Formation.

Limitations

• Dataset scope is confined to a specific geological basin and time period (Jurassic and Lower Cretaceous), limiting broader geographical applicability.
• Core data format (HTML, PDF) is not structured for direct computational analysis and would require manual extraction or parsing.

Provenance

Source

Geoscience Australia Data

Collection Method

null

Time Range

Jurassic and Lower Cretaceous periods

Freshness

null

Geography

Eromanga Basin in New South Wales, Australia