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| Titel: |
Morphology and kinematics of boudinage vein systems, Great Keppel Island, Queensland |
| Auteur: |
Smith, J. V. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 45 (1998) nr. 5 pagina's 807-815 |
| Jaar: |
1998-10 |
| Inhoud: |
Strongly boudinaged sandstone beds in a Palaeozoic accretionary complex are exposed on Great Keppel Island, off the central Queensland coast. Viewed in profile, the boudins are folded around mesoscopic F2 hinge zones and overprinted by S2 foliation indicating formation either during Late Carboniferous subduction accretion (D1) or during a previously unrecognised discrete early phase of the Permian deformation (D2). Boudin profiles record an average stretch of 1.51, although the contribution of D2 and later deformation is not determined. Viewed in the plane of bedding, vein traces are variable and oblique to boudin necks by an average of 12° anticlockwise. The overall en echelon arrangement of veins in boudin necks is a primary feature of the structure and cannot be attributed to later deformation. This pattern of veining indicates oblique extension of the boudin necks by low-vorticity non-coaxial flow within the plane of bedding. One possible setting with such kinematics is the limb of a non-cylindrical fold. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 10 van 16 gevonden artikelen
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