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| Titel: |
Structural geometry of a thick-skinned fold-thrust belt termination: the Olary Block in the Adelaide Fold Belt, South Australia |
| Auteur: |
Paul, E. Sandiford, M. Flottmann, T. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 47 (2000) nr. 2 pagina's 281-289 |
| Jaar: |
2000-04 |
| Inhoud: |
The Olary Block comprises a set of Palaeoproterozoic to Mesoproterozoic basement inliers that were deformed together with the Neoproterozoic sedimentary cover of the Adelaide Geosyncline during the ca 500 Ma Cambro-Ordovician Delamerian Orogeny. Balanced and restored structural sections across this region show shortening of less than 20%. These basement inliers represent the interface between a region of thick-skinned deformation bordering the Curnamona Craton to the north and a region of thin-skinned deformation to the south and west in the Nackara Arc. The basement inliers represent upthrust segments of the subsided basin margin with the sedimentary package thickening to the south and to the west. Earlier formed extensional faults provided the major strain guides during Delamerian shortening. An early phase of east-west shortening is interpreted to be synchronous with dextral strike-slip deformation along basement-relay structures (e.g. Darling River lineament). During progressive shortening the tectonic transport direction rotated into a northwest to north direction, coeval with the onset of the main phase of thin-skinned fold deformation in the adjacent Nackara Arc. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 12 van 12 gevonden artikelen
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