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Structural Interpretation of Line P81-U4, Amadeus Basin, Northern Territory, Australia

R.J. Schroder
R.J. Schroder
Pancontinental Petroleum Limited
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January 01, 1983


The Amadeus Basin is an intracratonic basin of some 50,000 sq km (19,305 sq mi) at the geographic center of Australia. Line P81-U4 is a dip line over a faulted anticlinal feature close to the McDonnell ranges, which fringe the northern margin of the basin. Hydrocarbons were discovered within the basin at Mereenie oil field, Palm Valley gas field, Ooraminna-1, and Dingo-2. Line P81-U4 is located 50 km (31 mi) northeast of the Mereenie oil field. The reservoir rock at Mereenie is the Pacoota Sandstone. The locality diagram shows the seismic line with respect to mapped outcrop.

Stratigraphic section in the Amadeus basin is of late Proterozoic to Early Paleozoic age. The Bitter Springs Formation to Base Mereenie Sandstone is an interbedded paralic and deep marine sequence containing clastics, evaporites, carbonates, and glacigene sediments. Formations that have a major bearing on the structural style are the evaporitic Bitter Springs and Chandler formations (Wells et al, 1970). Evidence for Bitter Springs diapirism is documented at Stokes Pass Diapir (McNaughton et al, 1968) with which the Undandita anticlinal anomaly is on trend.

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AAPG Studies in Geology

Seismic Expression of Structural Styles: A Picture and Work Atlas. Volume 1–The Layered Earth, Volume 2–Tectonics Of Extensional Provinces, & Volume 3–Tectonics Of Compressional Provinces

A. W. Bally
A. W. Bally
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American Association of Petroleum Geologists
ISBN electronic:
Publication date:
January 01, 1983




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