Tectonic evolution of the Cape and Karoo basins of South Africa

Controls on the locus of intraplate deformation in central Australia

A review of crust/upper mantle structure in the Precambrian areas of Australia and implications for Precambrian crustal evolution

Crustal architecture of central Australia based on deep seismic reflection profiling

Modest movements, spectacular fabrics in an intracontinental deep-crustal strike-slip fault: Striding-Athabasca mylonite zone, NW Canadian Shield

Deep Seismic profiling in central Australia

Summary. The major objective of the Central Australian seismic experiment is to investigate the structural evolution of the Arunta Block and the Ngalia and Amadeus Basins. A regional north-south reflection line of 420 km length from the Northern Arunta Province to the southern part of the Amadeus Basin was recorded in 1985. The most significant basement features are prominent bands of reflectors from beneath the Northern Arunta Province and the Ngalia Basin at times of between 4 and 10 s that dip towards the north. Deep crustal features south of the Ngalia Basin are less clear except in the Redbank Zone. Bands of deep reflectors similar to those observed in the north occur at times of between 5 and 10 s beneath the southern part of the Amadeus Basin. Additional seismic profiling included a reflection line of 40 km length recorded across the northern margin of the Redbank Zone, three expanding spread reflection profiles and a tomographic experiment. An east-west seismic refraction profile of 400 km length was recorded within the Arunta Block, and suggests an average crustal thickness of 55 km.

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The Central Australian seismic experiment, 1985: preliminary results

Seismic reflection and refraction profiling in central Australia: Implications for understanding the evolution of the Amadeus Basin

Tomographic reconstruction of upper crustal velocity variations in the Arunta Block, central Australia

In 1985, the Bureau of Mineral Resources (BMR) recorded a regional deep seismic reflection profile of 420 km length from the Northern Arunta Province to the southern part of the Amadeus Basin (Fig. 1); record lengths were 24 s. An additional 90 km of reflection recording were obtained in the form of cross lines or parallel lines. Experimental reflection recording to moderately large offsets was undertaken to study specific geological or structural problems. An east-west seismic refraction profile of 400 km length was also recorded within the Arunta Complex to determine crustal thickness and seismic velocity variations throughout the crust. Gravity was measured at 333 m intervals along all reflection traverses, and airborne magnetics were recorded along line 1 (Fig. 1).

S. Sugiharto

Papers

Deep Seismic profiling in central Australia

The Central Australian seismic experiment, 1985: preliminary results

Seismic reflection and refraction profiling in central Australia: Implications for understanding the evolution of the Amadeus Basin

Tomographic reconstruction of upper crustal velocity variations in the Arunta Block, central Australia

Some preliminary results from regional seismic profiling in Central Australia