Geometry of curved slickenlines as a function of rupture direction, asperity durability and coseismic roughening of fault surfaces

IF 2.6 2区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Timothy A. Little , Jesse Kearse , Yoshi Kaneko , Russ Van Dissen
{"title":"Geometry of curved slickenlines as a function of rupture direction, asperity durability and coseismic roughening of fault surfaces","authors":"Timothy A. Little ,&nbsp;Jesse Kearse ,&nbsp;Yoshi Kaneko ,&nbsp;Russ Van Dissen","doi":"10.1016/j.jsg.2024.105291","DOIUrl":null,"url":null,"abstract":"<div><div>Global data indicate slickenlines inscribed during surface rupturing earthquakes are typically curved. Dynamic rupture modelling relates slip curvature to time-varying stresses in rupture process zones. Such models generate striation curvature depending on rupture propagation direction and Andersonian slip type. Using 2D kinematic models in a new MATLAB program called <em>Slicks</em>, we explore expected patterns of curved slickenline on fault surfaces, comparing them to observations of natural slip striae on scarps of the Kekerengu Fault after the 2016 Kaikōura Earthquake, New Zealand, and the Alpine Fault, New Zealand which last ruptured in 1717 CE. As predicted by the dynamic rupture models, some slickenlines on both faults are curved at their upstream (older) ends and transition downstream to a longer, straighter trajectory. <em>Slicks</em> predicts that curved tracks should intersect, a relationship that we observed in the field, and that, for a given slip history, slickenline patterns and track-length distributions should vary depending on initial density of plowing elements, their mean durability or longevity, and the rates at which new asperities are introduced and smoothed. Striation patterns on the Kekerengu Fault suggest that inscribing asperities were established at the beginning of the earthquake rupture, with this roughness being quickly smoothed during the earthquake.</div></div>","PeriodicalId":50035,"journal":{"name":"Journal of Structural Geology","volume":"190 ","pages":"Article 105291"},"PeriodicalIF":2.6000,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Structural Geology","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0191814124002438","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

Global data indicate slickenlines inscribed during surface rupturing earthquakes are typically curved. Dynamic rupture modelling relates slip curvature to time-varying stresses in rupture process zones. Such models generate striation curvature depending on rupture propagation direction and Andersonian slip type. Using 2D kinematic models in a new MATLAB program called Slicks, we explore expected patterns of curved slickenline on fault surfaces, comparing them to observations of natural slip striae on scarps of the Kekerengu Fault after the 2016 Kaikōura Earthquake, New Zealand, and the Alpine Fault, New Zealand which last ruptured in 1717 CE. As predicted by the dynamic rupture models, some slickenlines on both faults are curved at their upstream (older) ends and transition downstream to a longer, straighter trajectory. Slicks predicts that curved tracks should intersect, a relationship that we observed in the field, and that, for a given slip history, slickenline patterns and track-length distributions should vary depending on initial density of plowing elements, their mean durability or longevity, and the rates at which new asperities are introduced and smoothed. Striation patterns on the Kekerengu Fault suggest that inscribing asperities were established at the beginning of the earthquake rupture, with this roughness being quickly smoothed during the earthquake.
求助全文
约1分钟内获得全文 求助全文
来源期刊
Journal of Structural Geology
Journal of Structural Geology 地学-地球科学综合
CiteScore
6.00
自引率
19.40%
发文量
192
审稿时长
15.7 weeks
期刊介绍: The Journal of Structural Geology publishes process-oriented investigations about structural geology using appropriate combinations of analog and digital field data, seismic reflection data, satellite-derived data, geometric analysis, kinematic analysis, laboratory experiments, computer visualizations, and analogue or numerical modelling on all scales. Contributions are encouraged to draw perspectives from rheology, rock mechanics, geophysics,metamorphism, sedimentology, petroleum geology, economic geology, geodynamics, planetary geology, tectonics and neotectonics to provide a more powerful understanding of deformation processes and systems. Given the visual nature of the discipline, supplementary materials that portray the data and analysis in 3-D or quasi 3-D manners, including the use of videos, and/or graphical abstracts can significantly strengthen the impact of contributions.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信