Strontium, Carbon, and Oxygen Isotope Data from NDI Carrara 1 Drill Hole

NDI Carrara 1 is a 1751-meter stratigraphic drill hole completed in 2020, intersecting ~625 meters of Paleozoic and ~1120 meters of Proterozoic rock. Geoscience Australia presents new high-resolution strontium (87Sr/86Sr), carbon (δ13C), and oxygen (δ18O) isotope data from carbonate samples to understand paleo-depositional environments and chemostratigraphy. The data was presented at the 2023 Australian Earth Science Convention.

Use Cases

• Correlating local stratigraphy with global marine isotope excursions based on δ13C and δ18O data.
• Investigating basin connectivity and restriction based on 87Sr/86Sr ratios compared to coeval seawater.
• Assessing diagenetic alteration and its impact on primary geochemical signals.
• Evaluating hydrocarbon potential in the Carrara Sub-basin based on isotopic signatures from sections with hydrocarbon shows.

Strengths

• Data is derived from a 1751-meter deep drill hole providing a continuous stratigraphic record.
• High-resolution isotope data for three distinct systems (Sr, C, O) from two major geological formations.
• Analysis was conducted by Geoscience Australia, a national geological survey, as part of a collaborative program.

Limitations

• The majority of samples show significant alteration, limiting assessment of primary depositional conditions.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and sample size are unknown, which may limit suitability assessment.

Provenance

Source

Geoscience Australia, MinEx CRC, and the Northern Territory Geological Survey.

Collection Method

Analytical program on samples from the NDI Carrara 1 stratigraphic drill hole.

Time Range

Samples span the Proterozoic (~1600 Ma) and Paleozoic (mid-Cambrian) periods.

Freshness

Last updated 2026-04-10 21:48:16.264959; freshness should be verified.

Geography

Carrara Sub-basin, South Nicholson region, Australia.