Vergence and facing patterns in large-scale sheath folds

Journal of Structural Geology

Volumn 21, Issue 10, 1999, Pages 1335-1349

  Alsop, G I ^a   Holdsworth, R E ^b  

^a UNIVERSITY OF ST ANDREWS   (United Kingdom)

^b DURHAM UNIVERSITY   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

FOLD HINGES; LARGE SCALE SHEATH FOLDS; MOINE NAPPE; NEOPROTEROZOIC MOINE PSAMMITES; STRUCTURAL FACING;

DEFORMATION; GEOMETRY; GEOMORPHOLOGY; LANDFORMS; SURFACES; TECTONICS;

STRUCTURAL GEOLOGY;

FOLD; STRUCTURAL ANALYSIS; THRUST;

UNITED KINGDOM;

EID: 0033208460     PISSN: 01918141     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0191-8141(99)00099-1     Document Type: Article

References (53)

1. Alsop G.I. Relationships between distributed and localized shear in the tectonic evolution of a Caledonian fold and thrust zone, northwest Ireland. Geological Magazine. 131:1994;123-136.
2. Alsop G.I., Holdsworth R.E. The distribution, geometry and kinematic significance of Caledonian buckle folds in the western Moine Nappe, northwestern Scotland. Geological Magazine. 130:1993;353-362.
3. Alsop G.I., Holdsworth R.E., Strachan R.A. Transport-parallel cross folds within a mid-crustal Caledonian thrust stack, northern Scotland. Journal of Structural Geology. 18:1996;783-790.
4. Barr D., Holdsworth R.E., Roberts A.M. Caledonian ductile thrusting in a Precambrian metamorphic complex: The Moines of NW Scotland. Geological Society of America Bulletin. 97:1986;754-764.
5. Bell A.M. Vergence: an evaluation. Journal of Structural Geology. 3:1981;197-202.
6. Bell T.H. Progressive deformation and reorientation of fold axes in a ductile mylonite zone: the Woodroffe thrust. Tectonophysics. 44:1978;285-321.
7. Berthe D., Brun J.P. Evolution of folds during progressive shear in the South Amorican Shear Zone, France. Journal of Structural Geology. 2:1980;127-133.
8. Boyle A.P. A model for stratigraphic and metamorphic inversions at Sulitjelma, central Scandes. Geological Magazine. 124:1987;451-466.
9. Bryant B., Reed J.C. Significance of lineation and minor folds near major thrust faults in the southern Appalachians and the British and Norwegian Caledonides. Geological Magazine. 106:1969;412-429.
10. Carreras J., Estrada A., White S. The effect of folding on the c-axis fabrics of a quartz mylonite. Tectonophysics. 39:1977;3-24.
11. Cobbold P.R., Quinquis H. Development of sheath folds in shear regimes. Journal of Structural Geology. 2:1980;119-126.
12. Coward M.P., Potts G.J. Complex strain patterns developed at the frontal and lateral tips to shear zones and thrust zones. Journal of Structural Geology. 5:1983;383-399.
13. Crispini L., Capponi G. Quartz fabric and strain partitioning in sheath folds: an example from the Voltri Group (Western Alps, Italy). Journal of Structural Geology. 19:1997;1149-1157.
14. Davis G.H., Reynolds S.J. Structural Geology of Rocks and Regions. 2nd ed :1996;John Wiley.
15. Dubey A.K., Cobbold P.R. Noncylindrical flexural slip folds in nature and experiment. Tectonophysics. 38:1977;223-239.
16. Escher A., Watterson J. Stretching fabrics, folds and crustal shortening. Tectonophysics. 22:1974;223-231.
17. Ghosh S.K., Sengupta S. Progressive development of structures in a ductile shear zone. Journal of Structural Geology. 9:1987;277-287.
18. Goscombe B. Intense non-coaxial shear and the development of mega-scale sheath folds in the Arunta Block, Central Australia. Journal of Structural Geology. 13:1991;299-318.
19. Hansen E. Strain Facies. 1971;Springer-Verlag, New York.
20. Harris A.L. Nature and timing of orogenesis in the Scottish Highlands and the role of the Great Glen Fault. Hibbard J.P., van Staal C.R., Cawood P.A. Current Perspective in the Appalachian-Caledonian Orogen. Special Paper 41:1995;65-79 Geological Association of Canada.
21. Henderson J.R. Structural analysis of sheath folds with horizontal X-axes, northeast Canada. Journal of Structural Geology. 3:1981;203-210.
22. Holdsworth, R.E., 1987. Basement/cover relationships, reworking and Caledonian ductile thrust tectonics of the Northern Moine, NW Scotland. Ph.D. thesis, University of Leeds.
23. Holdsworth R.E. The stereographic analysis of facing. Journal of Structural Geology. 10:1988;219-223.
24. Holdsworth R.E. The geology and structural evolution of a Caledonian fold and ductile thrust zone, Kyle of Tongue region, Sutherland, N. Scotland. Journal of the Geological Society of London. 146:1989;809-823.
25. Holdsworth R.E. Late brittle deformation in a Caledonian ductile thrust wedge: new evidence for gravitational collapse in the Moine Thrust sheet, Sutherland, Scotland. Tectonophysics. 170:1989;17-28.
26. Holdsworth R.E. Progressive deformation structures associated with ductile thrusts in the Moine Nappe, Sutherland, N. Scotland. Journal of Structural Geology. 12:1990;443-452.
27. Holdsworth, R.E., Alsop, G.I., Strachan, R.A., Blackbourn, G.A., McErlean, M.A., Burns, I.M., Graham, S., 1997. Tongue Sheet (114E Scotland) British Geological Survey, scale 1:50,000.
28. Holdsworth R.E., Grant C.J. Convergence-related 'dynamic spreading' in a mid-crustal ductile thrust zone: a possible orogenic wedge model. Knipe R.J., Rutter E.H. Deformation Mechanisms, Rheology and Tectonics. Special Publication 54:1990;491-500 Geological Society, London.
29. Holdsworth R.E., Roberts A.M. A study of early curvilinear fold structures and strain in the Moine of the Glen Garry region, Inverness-shire. Journal of the Geological Society of London. 141:1984;327-338.
30. Holdsworth, R.E., Strachan, R.A., Alsop, G.I., in press. Geology of the Tongue District. Memoirs of the British Geological Survey. Sheet 114E (Scotland).
31. Holdsworth R.E., Strachan R.A., Harris A.L. Moine Supergroup. Gibbons W.A., Harris A.L. A revised correlation of Precambrian rocks in the British Isles. vol. 22:1994;23-32 Geological Society, London. Special Report.
32. Johnson A.M., Fletcher R.C. Folding of viscous layers. Mechanical analysis and interpretation of structures in deformed rock. 1994;Columbia University Press.
33. Lacassin R., Mattauer M. Kilometre-scale sheath fold at Mattmark and implications for transport directions in the Alps. Nature. 315:1985;739-742.
34. Mendum J.R. A strain study of the Strathan Conglomerate, North Sutherland. Scottish Journal of Geology. 12:1976;135-146.
35. Mies J.W. Planar dispersion of folds in ductile shear zones and kinematic interpretation of fold hinge girdles. Journal of Structural Geology. 13:1991;281-297.
36. Mies J.W. Structural analysis of sheath folds in the Sylacauga Marble Group, Talladega slate belt, southern Appalachians. Journal of Structural Geology. 15:1993;983-993.
37. Minnigh L.D. Structural analysis of sheath-folds in a meta-chert from the Western Italian Alps. Journal of Structural Geology. 1:1979;275-282.
38. Park A.F. Geometry of sheath folds and related fabrics at the Luikonlahti mine, Svecokarelides, eastern Finland. Journal of Structural Geology. 10:1988;487-498.
39. Platt J.P. Progressive refolding in ductile shear zones. Journal of Structural Geology. 5:1983;619-622.
40. Quinquis H., Audren C., Brun J.P., Cobbold P.R. Intense progressive shear in Ille de Groix blueschists and compatibility with subduction or obduction. Nature. 273:1978;43-45.
41. Ramsay J.G., Huber M. Folds and Fractures. The Techniques of Modern Structural Geology. vol. 2:1987;Academic Press, London.
42. Rhodes S., Gayer R.A. Non-cylindrical folds, linear structures in the X-direction and mylonite developed during translation of the Caledonian Kalak Nappe Complex of Finnmark. Geological Magazine. 114:1977;329-341.
43. Ridley J. Parallel stretching lineations and fold axes oblique to displacement direction - a model and observations. Journal of Structural Geology. 8:1986;647-654.
44. Sanderson D.J. The development of fold axes oblique to the regional trend. Tectonophysics. 16:1973;55-70.
45. Skjernaa L. Rotation and deformation of randomly oriented planar and linear structures in progressive simple shear. Journal of Structural Geology. 2:1980;101-109.
46. Skjernaa L. Tubular folds and sheath folds: definitions and conceptual models for their development with examples from the Grapesvare area, northern Sweden. Journal of Structural Geology. 11:1989;689-703.
47. Soper N.J., Harris A.L., Strachan R.A. Tectonostratigraphy of the Moine Supergroup: a synthesis. Journal of the Geological Society, London. 155:1998;13-24.
48. Twiss R.J., Moores E.M. Structural Geology. 1992;Freeman, New York.
49. Vollmer F.W. A computer model of sheath-nappes formed during crustal shear in the Western Gneiss Region, central Norwegian Caledonides. Journal of Structural Geology. 10:1988;735-743.
50. Watkinson A.J., Cobbold P.R. Axial directions of folds in rocks with linear/planar fabrics. Journal of Structural Geology. 3:1981;211-217.
51. Williams G.D. Rotation of contemporary folds into the X direction during overthrust processes in Laksefjord, Finnmark. Tectonophysics. 48:1978;29-40.
52. Wood D.S. Current views of the development of slaty cleavage. Annual Review of Earth and Planetary Sciences. 2:1974;369-401.
53. Wood D.S., Oertal G. Deformation in the Cambrian slate belt of Wales. Journal of Geology. 88:1980;285-308.