Strontium, Carbon, Oxygen Isotope Data from Carrara Sub-basin Drill Core

High-resolution strontium (87Sr/86Sr), carbon (δ13C), and oxygen (δ18O) isotope data from carbonate samples from the NDI Carrara 1 drill hole. The data was collected by Geoscience Australia in 2020 to understand paleo-depositional environments and chemostratigraphy trends in the Carrara Sub-basin.

Use Cases

• Analyze 87Sr/86Sr ratios in Georgina Basin samples to assess connectivity to the global Cambrian ocean.
• Identify δ13C excursions coinciding with reported mid-Cambrian positive δ13C global marine excursions.
• Compare radiogenic 87Sr/86Sr values in Proterozoic Lawn Hill Formation samples to coeval mid-Proterozoic ocean expectations.
• Investigate δ18O shifts alongside δ13C excursions within Georgina Basin samples.

Strengths

• Data originates from a 1751-meter stratigraphic drill hole, providing a deep geological profile.
• Focuses on three specific isotope types: strontium (87Sr/86Sr), carbon (δ13C), and oxygen (δ18O).
• Samples cover two distinct geological formations: the Paleozoic Georgina Basin and the Proterozoic Lawn Hill Formation.

Limitations

• The majority of samples show significant alteration, limiting their use for assessing primary depositional conditions.
• No tabular data structure (rows/columns) or sample size is provided; data is presented in PDF/HTML reports.
• Geographic coverage is restricted to a single drill hole in the Carrara Sub-basin.

Provenance

Source

Geoscience Australia

Collection Method

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

Freshness

Data acquired in 2020, with analysis presented at a convention in 2023.

Geography

Carrara Sub-basin, South Nicholson region, Northern Territory, Australia.