Australian Triassic Palynozone Ages Calibrated with CA-IDTIMS Dating

A geochronological dataset recalibrating Australian Triassic palynostratigraphy to the international geologic timescale. The data was produced by Geoscience Australia using high-precision Chemical Abrasion-Isotope Dilution Thermal Ionisation Mass Spectrometry (CA-IDTIMS) dating of interbedded volcanic tuffs. The dataset includes dates from Triassic tuffs across Queensland, New South Wales, Tasmania, New Zealand, and Timor-Leste.

Use Cases

• Calibrating burial history models for petroleum exploration based on revised biozone ages.
• Correlating Australian palynological zones with the international geologic timescale using the provided numerical constraints.
• Revising chronostratigraphic understanding of Triassic petroleum systems in Australian and international basins.
• Facilitating international correlation of dinocyst and spore-pollen zones using dates from New Zealand and Timor-Leste.

Strengths

• Uses high-precision CA-IDTIMS dating, a method described as providing more accurate numerical ages than inference and interpolation.
• Samples volcanic tuffs from multiple Australian states and international locations, suggesting broad geographic coverage.
• Builds on a previously successful approach used to recalibrate middle and late Permian palynozones.

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 complicate automated extraction and analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

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

Time Range

Triassic period.

Freshness

Last updated 2026-05-14 03:31:00.234918; freshness should be verified.

Geography

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