Kinematics of décollement folding in the Lost River Range, Idaho

David J. Anastasio, Donald Myron Fisher, Theresa A. Messina, James E. Holl

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Décollement folding of massive (> 2 m thick) carbonate beds of the Scott Peak Formation, within the Willow Creek anticline, northern Lost River Range, Idaho was associated with the development of thin (<0.25 m), widely-spaced deformation zones. Incremental strain histories determined from fibrous overgrowths in strain fringes from the deformation zones provide a basis for kinematic analysis of the anticline. Plane strain is indicated by coaxial up-dip extension on cleavage (XY) planes and a lack of extension in the Y direction. In XZ sections, coaxial incremental strain histories characterize fold hinges and document pinned hinges during folding. The sense of rotation on opposing limbs indicates that the fiber curvature records primarily the spin of layers through fixed, moderately steep (66° ± 12° (1σ)), diverging extension directions. The magnitude of the external rotation for each sample is typically less than the bedding dip, suggesting that the external rotation also includes a component of internal rotation related to layer-parallel shear toward the upper flat panel or the hinge pin line. The magnitude of this internal rotation varies within and between layers.

Original languageEnglish (US)
Pages (from-to)355-368
Number of pages14
JournalJournal of Structural Geology
Volume19
Issue number3-4 SPEC. ISS.
StatePublished - Jan 1 1997

Fingerprint

folding
kinematics
river
anticline
dip
plane strain
history
cleavage
curvature
limb
fold
carbonate

All Science Journal Classification (ASJC) codes

  • Geology

Cite this

Anastasio, D. J., Fisher, D. M., Messina, T. A., & Holl, J. E. (1997). Kinematics of décollement folding in the Lost River Range, Idaho. Journal of Structural Geology, 19(3-4 SPEC. ISS.), 355-368.
Anastasio, David J. ; Fisher, Donald Myron ; Messina, Theresa A. ; Holl, James E. / Kinematics of décollement folding in the Lost River Range, Idaho. In: Journal of Structural Geology. 1997 ; Vol. 19, No. 3-4 SPEC. ISS. pp. 355-368.
@article{3cc8e8bde9b8487ea7055e553e52ec8f,
title = "Kinematics of d{\'e}collement folding in the Lost River Range, Idaho",
abstract = "D{\'e}collement folding of massive (> 2 m thick) carbonate beds of the Scott Peak Formation, within the Willow Creek anticline, northern Lost River Range, Idaho was associated with the development of thin (<0.25 m), widely-spaced deformation zones. Incremental strain histories determined from fibrous overgrowths in strain fringes from the deformation zones provide a basis for kinematic analysis of the anticline. Plane strain is indicated by coaxial up-dip extension on cleavage (XY) planes and a lack of extension in the Y direction. In XZ sections, coaxial incremental strain histories characterize fold hinges and document pinned hinges during folding. The sense of rotation on opposing limbs indicates that the fiber curvature records primarily the spin of layers through fixed, moderately steep (66° ± 12° (1σ)), diverging extension directions. The magnitude of the external rotation for each sample is typically less than the bedding dip, suggesting that the external rotation also includes a component of internal rotation related to layer-parallel shear toward the upper flat panel or the hinge pin line. The magnitude of this internal rotation varies within and between layers.",
author = "Anastasio, {David J.} and Fisher, {Donald Myron} and Messina, {Theresa A.} and Holl, {James E.}",
year = "1997",
month = "1",
day = "1",
language = "English (US)",
volume = "19",
pages = "355--368",
journal = "Journal of Structural Geology",
issn = "0191-8141",
publisher = "Elsevier Limited",
number = "3-4 SPEC. ISS.",

}

Anastasio, DJ, Fisher, DM, Messina, TA & Holl, JE 1997, 'Kinematics of décollement folding in the Lost River Range, Idaho', Journal of Structural Geology, vol. 19, no. 3-4 SPEC. ISS., pp. 355-368.

Kinematics of décollement folding in the Lost River Range, Idaho. / Anastasio, David J.; Fisher, Donald Myron; Messina, Theresa A.; Holl, James E.

In: Journal of Structural Geology, Vol. 19, No. 3-4 SPEC. ISS., 01.01.1997, p. 355-368.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Kinematics of décollement folding in the Lost River Range, Idaho

AU - Anastasio, David J.

AU - Fisher, Donald Myron

AU - Messina, Theresa A.

AU - Holl, James E.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Décollement folding of massive (> 2 m thick) carbonate beds of the Scott Peak Formation, within the Willow Creek anticline, northern Lost River Range, Idaho was associated with the development of thin (<0.25 m), widely-spaced deformation zones. Incremental strain histories determined from fibrous overgrowths in strain fringes from the deformation zones provide a basis for kinematic analysis of the anticline. Plane strain is indicated by coaxial up-dip extension on cleavage (XY) planes and a lack of extension in the Y direction. In XZ sections, coaxial incremental strain histories characterize fold hinges and document pinned hinges during folding. The sense of rotation on opposing limbs indicates that the fiber curvature records primarily the spin of layers through fixed, moderately steep (66° ± 12° (1σ)), diverging extension directions. The magnitude of the external rotation for each sample is typically less than the bedding dip, suggesting that the external rotation also includes a component of internal rotation related to layer-parallel shear toward the upper flat panel or the hinge pin line. The magnitude of this internal rotation varies within and between layers.

AB - Décollement folding of massive (> 2 m thick) carbonate beds of the Scott Peak Formation, within the Willow Creek anticline, northern Lost River Range, Idaho was associated with the development of thin (<0.25 m), widely-spaced deformation zones. Incremental strain histories determined from fibrous overgrowths in strain fringes from the deformation zones provide a basis for kinematic analysis of the anticline. Plane strain is indicated by coaxial up-dip extension on cleavage (XY) planes and a lack of extension in the Y direction. In XZ sections, coaxial incremental strain histories characterize fold hinges and document pinned hinges during folding. The sense of rotation on opposing limbs indicates that the fiber curvature records primarily the spin of layers through fixed, moderately steep (66° ± 12° (1σ)), diverging extension directions. The magnitude of the external rotation for each sample is typically less than the bedding dip, suggesting that the external rotation also includes a component of internal rotation related to layer-parallel shear toward the upper flat panel or the hinge pin line. The magnitude of this internal rotation varies within and between layers.

UR - http://www.scopus.com/inward/record.url?scp=0031104348&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031104348&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031104348

VL - 19

SP - 355

EP - 368

JO - Journal of Structural Geology

JF - Journal of Structural Geology

SN - 0191-8141

IS - 3-4 SPEC. ISS.

ER -

Anastasio DJ, Fisher DM, Messina TA, Holl JE. Kinematics of décollement folding in the Lost River Range, Idaho. Journal of Structural Geology. 1997 Jan 1;19(3-4 SPEC. ISS.):355-368.