The interpretation of fold axial data from regions of polyphase folding

Kieran F. Mulchrone

doi:10.1016/0191-8141(91)90128-6

The interpretation of fold axial data from regions of polyphase folding

Kieran F. Mulchrone

School of Mathematical Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

A region with two interfering fold phases is considered. If it is assumed that the early (F_n) and later (F_n+1) fold phase are cylindrical and that F_n+1 formed by shear folding, then it is shown how the a- b-directions of F_n+1 can be determined. A technique for determining the original orientation of F_n and S_n is presented provided that similar amounts of simple shear occurred on opposing limbs of F_n+1 folds. The cause of variability in fold axial orientations is investigated and information to be extracted from fold axial distributions is presented.

Original language	English
Pages (from-to)	275-280
Number of pages	6
Journal	Journal of Structural Geology
Volume	13
Issue number	3
DOIs	https://doi.org/10.1016/0191-8141(91)90128-6
Publication status	Published - 1991

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title = "The interpretation of fold axial data from regions of polyphase folding",

abstract = "A region with two interfering fold phases is considered. If it is assumed that the early (Fn) and later (Fn+1) fold phase are cylindrical and that Fn+1 formed by shear folding, then it is shown how the a- b-directions of Fn+1 can be determined. A technique for determining the original orientation of Fn and Sn is presented provided that similar amounts of simple shear occurred on opposing limbs of Fn+1 folds. The cause of variability in fold axial orientations is investigated and information to be extracted from fold axial distributions is presented.",

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AB - A region with two interfering fold phases is considered. If it is assumed that the early (Fn) and later (Fn+1) fold phase are cylindrical and that Fn+1 formed by shear folding, then it is shown how the a- b-directions of Fn+1 can be determined. A technique for determining the original orientation of Fn and Sn is presented provided that similar amounts of simple shear occurred on opposing limbs of Fn+1 folds. The cause of variability in fold axial orientations is investigated and information to be extracted from fold axial distributions is presented.

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VL - 13

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JO - Journal of Structural Geology

JF - Journal of Structural Geology

IS - 3

ER -

The interpretation of fold axial data from regions of polyphase folding

Abstract

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