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| Titel: |
The Arunta Inlier: A complex ensialic mobile belt in central Australia. Part 2: Tectonic history |
| Auteur: |
Shaw, R. D. Stewart, A. J. Black, L. P. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 31 (1984) nr. 4 pagina's 457-484 |
| Jaar: |
1984-12 |
| Inhoud: |
The Arunta Inlier is part of a major ensialic Proterozoic mobile belt in central Australia. It comprises three latitudinal tectonic Provinces (Northern, Central and Southern) which have markedly different lithological, metamorphic and structural histories, and are bounded by major deformed zones. Tectonic activity migrated back and forth within the Inlier, and gradually lessened in intensity and extent. Large-scale movements were localized along the bounding deformed zones from early on. Deformation and metamorphism were concentrated in the Central Province at about 1800-1750 Ma, and then at about 1700 Ma moved to its margins. Subsequent activity at 1700-1600, 1500-1400, 1050-900 and 400-300 Ma was concentrated in the Southern Province and in a belt which extended NW across the entire Inlier from the E part of the Southern Province. The tectonic evolution of the Arunta Inlier resulted from six cycles of crustal extension and compression. The first (before 1800 Ma), and possibly the second (1800-1750 Ma) caused rifting and then limited subduction of subcrustal lithosphere. The later cycles suggest repeated thermal activity and thrust-faulting in relatively narrow crustal belts above a long-lasting elongate plume in the mantle. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 8 van 11 gevonden artikelen
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