SHRIMP U-Pb Geochronology for Carpentaria Lowlands Basement Rocks, Queensland

New Sensitive High Resolution Ion Microprobe (SHRIMP) U–Pb geochronological results for three rock samples from the Carpentaria Lowlands Region in Queensland. The data includes magmatic crystallisation ages for Proterozoic granitoids and a maximum depositional age for a Permian siltstone. The record was published by Geoscience Australia as part of the NE Queensland Solid Geology Project in 2026.

Use Cases

• Refining regional tectonic models based on precise magmatic crystallisation ages of 1539.7 ± 2.8 Ma and 1538.4 ± 3.3 Ma.
• Correlating concealed sedimentary basins using maximum depositional ages, such as the 279.9 ± 2.4 Ma age for the Gamboola Basin.
• Interpreting geophysical data by linking rock types (e.g., granitic gneiss, diorite) with their magnetic response characteristics.
• Investigating sediment provenance by analyzing detrital zircon populations, such as the ca 1572 Ma grains found in the Permian siltstone.

Strengths

• Provides high-precision U-Pb ages with reported analytical uncertainties (e.g., ± 2.8 Ma).
• Includes detailed sample context with specific drill hole names (e.g., Z.C.L. Weipa 1) and depths (e.g., ca 885.7 m).
• Links geochronological data to geological provinces (Keer Weer Province, Kowanyama Province) and tectonic events.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Geoscience Australia Data

Collection Method

Sensitive High Resolution Ion Microprobe (SHRIMP) U–Pb analysis of zircon crystals from drill core samples.

Time Range

Samples date from the Proterozoic (ca 1539 Ma) to the Permian (ca 280 Ma).

Freshness

Last updated 2026-04-30 15:28:37.348770; freshness should be verified.

Geography

Carpentaria Lowlands Region, Queensland, Australia, with specific locations near Weipa and the Townsville–Mornington Island Belt.