Australian Triassic Palynostratigraphy Recalibrated with CA-IDTIMS Dating

Chemical Abrasion-Isotope Dilution Thermal Ionisation Mass Spectrometry (CA-IDTIMS) dating of volcanic tuffs provides numerical ages for Triassic palynological biozones. The dataset targets tuffs across Queensland, New South Wales, Tasmania, New Zealand, and Timor-Leste to recalibrate Australian biozones to the international geologic timescale. This work is from Geoscience Australia Data and was last updated on 2026-04-20.

Use Cases

• Recalibrating burial history models for petroleum exploration based on revised numerical ages for palynozones.
• Correlating Australian Triassic biozones with the international geologic timescale based on high-precision CA-IDTIMS dates.
• Refining chronostratigraphic understanding of Triassic petroleum systems in the Northern Carnarvon and Roebuck Basins based on updated biozone ages.

Strengths

• Uses high-precision CA-IDTIMS dating on volcanic tuffs, a method described as providing more accurate numerical ages than inference and interpolation.
• Samples cover multiple Australian states and international locations, including Queensland, New South Wales, Tasmania, New Zealand, and Timor-Leste.
• Preliminary results suggest Triassic biozone ages are in need of considerable revision, indicating the dataset addresses a known gap.

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 direct computational 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 2026-04-20 03:29:03.836544; freshness should be verified.

Geography

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