{"title":"Influence of Lateral Shear on the Formation of Enceladus' South Polar Terrain","authors":"Y. Jin, S. Chen, A. Yin, H. Zhang, Y. Shi","doi":"10.1029/2024JE008860","DOIUrl":null,"url":null,"abstract":"<p>Structural mapping indicates that Enceladus' South Polar Terrain (SPT) has experienced a regional-scale right-lateral shear, but the precise role of the regional shear in SPT's evolution is still under debate. Here we investigate the effects of lateral shear with a three-dimensional visco-elasto-plastic model. By presetting a circular thinned lid around the south pole, we have obtained numerical results in good agreement with the general tectonic pattern of today's SPT, which explain the formation mechanism for some of the peculiar structures in the SPT. Our results suggest an inward cascading procedure in initiating the Tiger Stripes, wherein the fracturing starts at the rim of the thinned lid. Furthermore, we put forward the potential existence of ancient Riedel shear zones that pass through the tips of the Tiger Stripes, which may correspond to the strips with low albedo in infrared band in the albedo maps of the SPT.</p>","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 10","pages":""},"PeriodicalIF":4.0000,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Geophysical Research: Planets","FirstCategoryId":"89","ListUrlMain":"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JE008860","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
Structural mapping indicates that Enceladus' South Polar Terrain (SPT) has experienced a regional-scale right-lateral shear, but the precise role of the regional shear in SPT's evolution is still under debate. Here we investigate the effects of lateral shear with a three-dimensional visco-elasto-plastic model. By presetting a circular thinned lid around the south pole, we have obtained numerical results in good agreement with the general tectonic pattern of today's SPT, which explain the formation mechanism for some of the peculiar structures in the SPT. Our results suggest an inward cascading procedure in initiating the Tiger Stripes, wherein the fracturing starts at the rim of the thinned lid. Furthermore, we put forward the potential existence of ancient Riedel shear zones that pass through the tips of the Tiger Stripes, which may correspond to the strips with low albedo in infrared band in the albedo maps of the SPT.
期刊介绍：
The Journal of Geophysical Research Planets is dedicated to the publication of new and original research in the broad field of planetary science. Manuscripts concerning planetary geology, geophysics, geochemistry, atmospheres, and dynamics are appropriate for the journal when they increase knowledge about the processes that affect Solar System objects. Manuscripts concerning other planetary systems, exoplanets or Earth are welcome when presented in a comparative planetology perspective. Studies in the field of astrobiology will be considered when they have immediate consequences for the interpretation of planetary data. JGR: Planets does not publish manuscripts that deal with future missions and instrumentation, nor those that are primarily of an engineering interest. Instrument, calibration or data processing papers may be appropriate for the journal, but only when accompanied by scientific analysis and interpretation that increases understanding of the studied object. A manuscript that describes a new method or technique would be acceptable for JGR: Planets if it contained new and relevant scientific results obtained using the method. Review articles are generally not appropriate for JGR: Planets, but they may be considered if they form an integral part of a special issue.
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