Horn Valley Siltstone Facies Analysis from Five Cored Wells

A reconnaissance study of the Horn Valley Siltstone formation in the Amadeus Basin, subdivided into ten informal lithofacies members. The analysis is based on sedimentological and palaeontological data from five fully cored wells, with organic geochemical data confirming facies variations. The transition between members HV6 and HV7 coincides with high organic content, featuring Total Organic Carbon values up to 6.30%.

Use Cases

• Model vertical lithofacies variations from HV1 to HV10 using sedimentological and palaeontological features like body fossils and trace fossils.
• Analyze the relationship between shale to carbonate ratio shifts and recorded Total Organic Carbon values, particularly at the HV6-HV7 boundary.
• Correlate facies distributions across the five cored well locations (Henbury, Mt Liebig, Tempe Vale, Tent Hill) using defined member characteristics.
• Investigate how the presence or absence of bioturbating organisms relates to inferred bottom water oxygen concentrations from the sediment record.

Strengths

• Analysis is grounded in data from five specific, fully cored wells (Henbury #4, Henbury #6, Mt Liebig #2, Tempe Vale#1, Tent Hill #1).
• Defines ten distinct informal members (HV1 to HV10) for structured facies analysis.
• Includes organic geochemical data from Tempe Vale #1 and Tent Hill #1 to confirm lithofacies interpretations.
• Reports concrete Total Organic Carbon measurements, with values up to 6.30%.

Limitations

• Core sample exposure is described as usually poor, potentially limiting data continuity.
• The study is a reconnaissance analysis, which may indicate a preliminary or non-exhaustive scope.
• Data format is primarily documented reports (HTML, PDF), not a structured, machine-readable table.

Provenance

Source

Geoscience Australia Data

Collection Method

Sedimentological and palaeontological analysis of material from fully cored wells.

Time Range

null

Freshness

Last updated 2026-03-07.

Geography

Amadeus Basin