Full-colour map summarises the major Proterozoic mafic-ultramafic magmatic events in the NT and SA. Eighteen events are recognised with three of these (~1810 Ma, ~1130 Ma,~520 Ma or younger) mineralised (Ni, Cu, Co, PGEs). Inset maps show the distribution of Proterozoic and Archaean rocks, mineral occurrences, large igneous provinces, time-space-event chart, and geophysical-elevation imagery. Geological Map (1:4,000,000 Scale)

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Compiled by Tectonic Map Committee, Geological Society of Australia, in association with the Commonwealth Bureau of Mineral Resources, Geology and Geophysics and the State Mines Departments and with the assistance of Australian Universities, Mining and Oil Exploration Companies and the Royal Australian Navy. Base map and bathymetric contours prepared by the Division of National Mapping. Drawn and published by the Bureau of mineral resources, Geology and Geophysics, Department of national Development.

*** removed from website on advice from author *** 'Basins of Australia' map has been compiled as part of AGSO's studies of Australia's basins and continental margin. It shows outlines of all major sedimentary basins and sub-basins with their names both onshore and offshore. Outlines of sedimentary basins offshore were revised in 1995-96 to conform with new data/ideas on continental margin evolution and include volcanic margins features. The original compilation material included 44 published and unpublished contour maps (1977-1994) and 178 publications. The maps used for compilation varied in scale from 1:250 000 to 1:2 000 000, however, in some areas, where detailed maps were not available, small-scale maps (1:5 000 000 and even 1:10 000 000) were used to fill in the gaps. Large-scale maps have been generalised to conform to 1:6 000 000 scale of the final compilation. Most of the original maps reflected depth to basement (onshore basins, eastern and southern basins). In the absence of depth to the basement data, the deepest mapped horizon, or the horizon reflecting the main phase of rift basin development are portrayed (North West Shelf). The map shows outcrops of crystalline basement and Proterozoic basins. Different colour zones illustrate the age of oceanic crust. Plate tectonic elements, such as magnetic lineations, transform faults, continent-ocean boundary, subduction and collision zones are also included.

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