Variation in fold geometry in the Yuso basin, northern Spain: implications for the deformation regime
dc.contributor.author | van der Pluijm, Ben A. | en_US |
dc.contributor.author | Savage, John F. | en_US |
dc.contributor.author | Kaars-Sijpesteijn, Caspar H. | en_US |
dc.date.accessioned | 2006-04-07T19:40:45Z | |
dc.date.available | 2006-04-07T19:40:45Z | |
dc.date.issued | 1986 | en_US |
dc.identifier.citation | van der Pluum, Ben A., Savage, John F., Kaars-Sijpesteijn, Caspar H. (1986)."Variation in fold geometry in the Yuso basin, northern Spain: implications for the deformation regime." Journal of Structural Geology 8(8): 879-886. <http://hdl.handle.net/2027.42/26441> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6V9D-488Y8KP-1H/2/89bda5980836ab7325eb98002bc9b5b6 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/26441 | |
dc.description.abstract | First generation structures in greywackes of the Yuso Group from the Cantabrian Mountains of northern Spain show a distinct variation in geometry with depth in a regional synclinal structure (Curavacas and Lechada synclines); they are easily distinguished from other deformation events. In the structurally uppermost level we find `flap folds'. Flap folds are recumbent structures with the inverted limb preserved. Below this level `cascade folds' are found. These structures have a vergence opposite to that of parasitic folds. The nomenclature adopted is from Harrison and Falcon. Characteristically, these structures have shallowly dipping axial surfaces, in agreement with the shallow dip of the axial plane (regional) cleavage. In the lowermost structural level, upright parasitic folds with a steep cleavage are present. The variation in fold geometry is accompanied by a general steepening of the regional cleavage with increasing depth. In the absence of overprinting relationships the F1 fold geometries are included in a single deformation event.The steepening of the cleavage with depth reflects the change in orientation of the maximum shortening direction from sub-vertical in the upper part of the syncline to sub-horizontal in the lower part. With increasing depth the deformation regime during F1 changed from bending to buckling. The deformation regime on the regional scale, however, is associated with basement subsidence and passive formation of the regional synclinal structure. Furthermore, the absence of a distinct microfabric for the different F1 folds indicates that on a small scale a similar deformation regime was present. We conclude, therefore, that the scale at which we study a structure only reflects the deformation regime at that particular scale. Consequently, the overall deformation regime cannot be determined from single outcrops or microstructural analysis alone. | en_US |
dc.format.extent | 807647 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Elsevier | en_US |
dc.title | Variation in fold geometry in the Yuso basin, northern Spain: implications for the deformation regime | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Geology and Earth Sciences | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Geological Sciences, University of Michigan, 1006 C.C. Little Building, Ann Arbor, MI 48109, U.S.A. | en_US |
dc.contributor.affiliationother | Institute of Earth Sciences, University of Utrecht, PO Box 80.021, 3508 TA, Utrecht, The Netherlands | en_US |
dc.contributor.affiliationother | Shell Internationale Petroleum Maatschappij BV, PO Box 162, 2501 AN, Den-Haag, The Netherlands | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/26441/1/0000529.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0191-8141(86)90033-7 | en_US |
dc.identifier.source | Journal of Structural Geology | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
Files in this item
Remediation of Harmful Language
The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.
Accessibility
If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.