Australian Triassic Palynostratigraphy Recalibrated with CA-IDTIMS Dating

A geochronological dataset from Geoscience Australia, last updated in 2026, recalibrating Australian Triassic palynostratigraphy to the international geologic timescale. It uses high-precision Chemical Abrasion-Isotope Dilution Thermal Ionisation Mass Spectrometry (CA-IDTIMS) dating of volcanic tuffs from Queensland, New South Wales, Tasmania, New Zealand, and Timor-Leste. The work provides numerical age constraints for biozone boundaries, impacting petroleum exploration burial history models.

Use Cases

• Recalibrating burial history models for petroleum exploration based on revised biozone ages.
• Correlating Australian Triassic biozones with the international geologic timescale based on CA-IDTIMS dates.
• Refining chronostratigraphic understanding of Triassic petroleum systems based on palynological zonations.

Strengths

• Uses high-precision CA-IDTIMS dating, a method noted for its accuracy in the description.
• Samples cover multiple Australian regions (Queensland, NSW, Tasmania) and international locations (New Zealand, Timor-Leste).
• Explicitly aims to revise ages previously assigned through inference and interpolation.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is provided in PDF format, which may hinder direct computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Chemical Abrasion-Isotope Dilution Thermal Ionisation Mass Spectrometry (CA-IDTIMS) dating of volcanic tuffs.

Time Range

Triassic period

Freshness

Last updated 2026-04-30 14:06:01.013004; freshness should be verified.

Geography

Queensland, New South Wales, Tasmania (Australia); New Zealand; Timor-Leste.