3D geometry and kinematic evolution of extensional fault-related folds, NW Red Sea, Egypt. / Khalil, Samir; McClay, Kenneth.

The Geometry and Growth of Normal Faults. ed. / C Childs; R E Holdsworth; C A-L Jackson; T Manzocchi; J J Walsh; G Yielding. Vol. 439 London : Geological Society of London, 2016. p. 109-130.

Research output: Chapter in Book/Report/Conference proceedingChapter

Published

Standard

3D geometry and kinematic evolution of extensional fault-related folds, NW Red Sea, Egypt. / Khalil, Samir; McClay, Kenneth.

The Geometry and Growth of Normal Faults. ed. / C Childs; R E Holdsworth; C A-L Jackson; T Manzocchi; J J Walsh; G Yielding. Vol. 439 London : Geological Society of London, 2016. p. 109-130.

Research output: Chapter in Book/Report/Conference proceedingChapter

Harvard

Khalil, S & McClay, K 2016, 3D geometry and kinematic evolution of extensional fault-related folds, NW Red Sea, Egypt. in C Childs, RE Holdsworth, CA-L Jackson, T Manzocchi, JJ Walsh & G Yielding (eds), The Geometry and Growth of Normal Faults. vol. 439, Geological Society of London, London, pp. 109-130. https://doi.org/10.1144/SP439.11

APA

Khalil, S., & McClay, K. (2016). 3D geometry and kinematic evolution of extensional fault-related folds, NW Red Sea, Egypt. In C. Childs, R. E. Holdsworth, C. A-L. Jackson, T. Manzocchi, J. J. Walsh, & G. Yielding (Eds.), The Geometry and Growth of Normal Faults (Vol. 439, pp. 109-130). Geological Society of London. https://doi.org/10.1144/SP439.11

Vancouver

Khalil S, McClay K. 3D geometry and kinematic evolution of extensional fault-related folds, NW Red Sea, Egypt. In Childs C, Holdsworth RE, Jackson CA-L, Manzocchi T, Walsh JJ, Yielding G, editors, The Geometry and Growth of Normal Faults. Vol. 439. London: Geological Society of London. 2016. p. 109-130 https://doi.org/10.1144/SP439.11

Author

Khalil, Samir ; McClay, Kenneth. / 3D geometry and kinematic evolution of extensional fault-related folds, NW Red Sea, Egypt. The Geometry and Growth of Normal Faults. editor / C Childs ; R E Holdsworth ; C A-L Jackson ; T Manzocchi ; J J Walsh ; G Yielding. Vol. 439 London : Geological Society of London, 2016. pp. 109-130

BibTeX

@inbook{920bfc8869394b82a9100920c79cbb5e,
title = "3D geometry and kinematic evolution of extensional fault-related folds, NW Red Sea, Egypt",
abstract = "Fault-related folds are common structural features found at a variety of scales in extensional settings, and have been recognized in both outcrop and subsurface studies. However, the detailed geometry and origin of complex 3D folds adjacent to normal faults are poorly known, and, in some cases, are interpreted to be due to strike-slip tectonics and post-rift contraction. Here we examine the 3D geometry of seismic-scale folds in a rift margin – the Red Sea – and discuss the interrelationship between the growth of normal faults and the development of their related folds. Detailed field mapping of the NW Red Sea rift system has shown that the rift margin is dominated by two large extensional fault systems formed by a series of linked NNW-, north–south- and NNE-striking fault segments. These linked segments exhibit distinct zigzag fault patterns and combine to form a number of NNW-trending faults that dip NE with dominant hanging-wall stratal dips to the SW. Hanging-wall stratal dips define 3D extensional fault-related synclinal folds in pre- and early synrift strata. The hanging-wall synclines are kilometre-scale, gently doubly plunging, with curved axial surface traces orientated sub-parallel to the bounding faults. Field data demonstrated that these folds are formed by along-strike variations in fault displacements, and they form transverse synclines combined with hanging-wall extensional fault-propagation folds. The complex 3D geometry of the hanging-wall synclines is the result of the along-strike segment linkage. Adjacent to the bounding faults, the stratal dips are sub-parallel to the faults as a result of extensional fault-propagation folding controlled by highly anisotropic pre-rift strata. Palaeo-strain analyses of fault-slip data, together with analysis of the fold geometry, clearly indicate that the faulting and folding in the NW Red Sea are formed by pure NE–SW extension during the Late Oligocene–Miocene rifting, and that contraction or strike-slip tectonics need not be invoked.",
author = "Samir Khalil and Kenneth McClay",
year = "2016",
month = mar,
day = "30",
doi = "10.1144/SP439.11",
language = "English",
isbn = "978-1-86239-967-9",
volume = "439",
pages = "109--130",
editor = "C Childs and Holdsworth, {R E} and Jackson, {C A-L} and T Manzocchi and Walsh, {J J} and G Yielding",
booktitle = "The Geometry and Growth of Normal Faults",
publisher = "Geological Society of London",

}

RIS

TY - CHAP

T1 - 3D geometry and kinematic evolution of extensional fault-related folds, NW Red Sea, Egypt

AU - Khalil, Samir

AU - McClay, Kenneth

PY - 2016/3/30

Y1 - 2016/3/30

N2 - Fault-related folds are common structural features found at a variety of scales in extensional settings, and have been recognized in both outcrop and subsurface studies. However, the detailed geometry and origin of complex 3D folds adjacent to normal faults are poorly known, and, in some cases, are interpreted to be due to strike-slip tectonics and post-rift contraction. Here we examine the 3D geometry of seismic-scale folds in a rift margin – the Red Sea – and discuss the interrelationship between the growth of normal faults and the development of their related folds. Detailed field mapping of the NW Red Sea rift system has shown that the rift margin is dominated by two large extensional fault systems formed by a series of linked NNW-, north–south- and NNE-striking fault segments. These linked segments exhibit distinct zigzag fault patterns and combine to form a number of NNW-trending faults that dip NE with dominant hanging-wall stratal dips to the SW. Hanging-wall stratal dips define 3D extensional fault-related synclinal folds in pre- and early synrift strata. The hanging-wall synclines are kilometre-scale, gently doubly plunging, with curved axial surface traces orientated sub-parallel to the bounding faults. Field data demonstrated that these folds are formed by along-strike variations in fault displacements, and they form transverse synclines combined with hanging-wall extensional fault-propagation folds. The complex 3D geometry of the hanging-wall synclines is the result of the along-strike segment linkage. Adjacent to the bounding faults, the stratal dips are sub-parallel to the faults as a result of extensional fault-propagation folding controlled by highly anisotropic pre-rift strata. Palaeo-strain analyses of fault-slip data, together with analysis of the fold geometry, clearly indicate that the faulting and folding in the NW Red Sea are formed by pure NE–SW extension during the Late Oligocene–Miocene rifting, and that contraction or strike-slip tectonics need not be invoked.

AB - Fault-related folds are common structural features found at a variety of scales in extensional settings, and have been recognized in both outcrop and subsurface studies. However, the detailed geometry and origin of complex 3D folds adjacent to normal faults are poorly known, and, in some cases, are interpreted to be due to strike-slip tectonics and post-rift contraction. Here we examine the 3D geometry of seismic-scale folds in a rift margin – the Red Sea – and discuss the interrelationship between the growth of normal faults and the development of their related folds. Detailed field mapping of the NW Red Sea rift system has shown that the rift margin is dominated by two large extensional fault systems formed by a series of linked NNW-, north–south- and NNE-striking fault segments. These linked segments exhibit distinct zigzag fault patterns and combine to form a number of NNW-trending faults that dip NE with dominant hanging-wall stratal dips to the SW. Hanging-wall stratal dips define 3D extensional fault-related synclinal folds in pre- and early synrift strata. The hanging-wall synclines are kilometre-scale, gently doubly plunging, with curved axial surface traces orientated sub-parallel to the bounding faults. Field data demonstrated that these folds are formed by along-strike variations in fault displacements, and they form transverse synclines combined with hanging-wall extensional fault-propagation folds. The complex 3D geometry of the hanging-wall synclines is the result of the along-strike segment linkage. Adjacent to the bounding faults, the stratal dips are sub-parallel to the faults as a result of extensional fault-propagation folding controlled by highly anisotropic pre-rift strata. Palaeo-strain analyses of fault-slip data, together with analysis of the fold geometry, clearly indicate that the faulting and folding in the NW Red Sea are formed by pure NE–SW extension during the Late Oligocene–Miocene rifting, and that contraction or strike-slip tectonics need not be invoked.

U2 - 10.1144/SP439.11

DO - 10.1144/SP439.11

M3 - Chapter

SN - 978-1-86239-967-9

VL - 439

SP - 109

EP - 130

BT - The Geometry and Growth of Normal Faults

A2 - Childs, C

A2 - Holdsworth, R E

A2 - Jackson, C A-L

A2 - Manzocchi, T

A2 - Walsh, J J

A2 - Yielding, G

PB - Geological Society of London

CY - London

ER -