Late Proterozoic Tectonic Structures of Prydz Bay

Research abstracts analyze the poly-metamorphic terrain and structural evolution of the East Antarctic mobile belt in the Prydz Bay area. The data originates from the Australian Antarctic Data Centre and was last updated in March 1994. It compiles findings on deformation phases, metamorphic conditions, and kinematic interpretations from geological studies.

Use Cases

• Correlate regional deformation phases (D1-D6) based on lineation direction and shear sense described in the abstracts.
• Model pressure-temperature conditions using recorded peak metamorphic assemblages like garnet-orthopyroxene pairs indicating ~7 kbar and ~780°C.
• Analyze the temporal relationship between compressional (D1-2) and extensional (D3-6) structures to test exhumation models.
• Map structural domains using described features like synclinal troughs, high-strain zones, and D3 low-strain windows from the Larsemann Hills.

Strengths

• Covers a significant 200 km coastal exposure of the mobile belt.
• Provides specific metamorphic pressure-temperature estimates (e.g., ~7 kbar, ~780°C).
• Delineates multiple deformation phases (D1 through D6) with kinematic context.

Limitations

• Sample size and row count are unknown.
• Data is temporally stale, with no updates since 1994.
• Lack of column definitions and raw sample data limits quantitative analysis.

Provenance

Source

Australian Antarctic Data Centre (AU_AADC), sourced from NASA's Earthdata platform.

Collection Method

Compilation from referenced geological research paper abstracts.

Time Range

Late Proterozoic to early Palaeozoic tectonic events.

Freshness

1994-03-31

Geography

Prydz Bay area and Larsemann Hills, East Antarctica.