Progressive back-warping of a rider block atop an actively exhuming, continental low-angle normal fault

Can continental low-angle normal faults (LANFs) initiate and remain active at shallow (44° at the surface, and was subsequently back-rotated while active to its present 15–22° surface dip. This suggests that continental LANFs initiate at moderate dips, and evolve according to the ‘rolling-hinge’ pro...

Full description

Saved in:
Bibliographic Details
Published in:Journal of structural geology 2020-01, Vol.130, p.103906, Article 103906
Main Authors: Webber, S., Little, T.A., Norton, K.P., Österle, J., Mizera, M., Seward, D., Holden, G.
Format: Article
Language:English
Subjects:
Gwoira fault
Low-angle normal fault
Mai'iu fault
Papua New Guinea
Rider block
Rolling-hinge
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Can continental low-angle normal faults (LANFs) initiate and remain active at shallow (44° at the surface, and was subsequently back-rotated while active to its present 15–22° surface dip. This suggests that continental LANFs initiate at moderate dips, and evolve according to the ‘rolling-hinge’ process. •A low-angle normal fault in SE PNG initiated with a >44° ‘Andersonian’ surface dip.•The dip of the fault decreased as slip proceeded.•Part of the fault was abandoned, resulting in the development of a rider block.•The rider block was rotated as slip proceeded, and preserves sedimentary dip-fanning.•10Be/26Al cosmogenic burial dating of rider block sediments provide age constraints.
ISSN:0191-8141
1873-1201
DOI:10.1016/j.jsg.2019.103906