Argon Isotope Geochronology Data for Kerguelen Plateau Basalts

40Ar/39Ar geochronology data for basalt samples collected from the Kerguelen Plateau and Broken Ridge. The dataset includes samples from Ocean Drilling Program (ODP) cores and dredge sites, curated by the Kochi Core Centre in Japan and the National Museum of Natural History in France. Analyses were performed at the Western Australian Argon Isotope Facility at Curtin University, with the dataset last updated in June 2019.

Use Cases

• Determining plateau ages using criteria referencing 39Ar release percentage and consecutive step agreement.
• Calibrating irradiation procedures using FCs and GA1550 standard ages provided in the methodology.
• Analyzing step-heating data from mass spectrometer measurements of argon isotopes (masses 40 to 36).
• Comparing geochronological results from different sample materials like plagioclase, pyroxene, and basaltic glass.

Strengths

• Detailed analytical methodology for 40Ar/39Ar dating is documented, including irradiation and measurement protocols.
• Sample provenance is specified, including storage at recognized repositories like the Kochi Core Centre.

Limitations

• Specific data volume (row count, file size) and column schema are not provided.
• The dataset's temporal coverage for the sampled events is not explicitly stated, only the data's last update date.

Provenance

Source

AU_AADC, with analyses conducted at the Western Australian Argon Isotope Facility, Curtin University.

Collection Method

Samples from ODP drilling cores and dredge sites were processed using magnetic separation, hand-picking, acid leaching, irradiation, and analyzed via mass spectrometry.

Freshness

Last updated on 2019-06-30.

Geography

Kerguelen Plateau and Broken Ridge in the Southern Ocean.