Extended data for: Impact of sub-basalt thrust systems on the Faroe continental shelf for the late Paleoproterozoic–Cenozoic tectonic evolution of the margin

High-resolution version of the seismic reflection data off the Faroe Islands from TGS presented in \"Impact of sub-basalt thrust systems on the Faroe continental shelf for the late Paleoproterozoic–Cenozoic tectonic evolution of the margin\". The data were acquired by Western Geophysical in 1994-1995 and reprocessed by TGS between April 2011 and January 2012 (Nicholson, 2012; internal reprocessing report accessible upon contacting TGS). Nicholson, A.: Final Report Seismic Data Re-processing Offshore Faroes, April 2011-January 2012, Project No. 624, Project Code OF9495RE11, 2012. Extended data for \"Impact of sub-basalt thrust systems on the Faroe continental shelf for the late Paleoproterozoic–Cenozoic tectonic evolution of the margin\". The dataset includes the following: -Figure_2a: Interpreted (up) and uninterpreted (down) Figure 2a: NNE–SSW-trending seismic transect west of the Faroe Islands showing the occurrence of major NNE-dipping, top-SSW thrust systems below Cenozoic lavas off the Faroe Islands. The thrust systems consist of major mylonitic shear surfaces (red lines) and of tightly folded bedding or foliation surfaces (yellow lines). Relatively small (kilometer to hundreds of meters wide) features of interest include asymmetric (up to isoclinal recumbent) folds, duplexes, and antiformal thrust stacks. The vergence of asymmetric fold structures (and mylonitic shear surfaces) is opposite on either side of major ridges and highs, e.g., at Wyville–Thomson Ridge, suggesting limited amounts of movement. There are Z-shaped reflections in the lower part of the Suðurøy and West Faroe fault zones suggesting extensional reactivation of the fault zones. -Figure_2b: Interpreted (up) and uninterpreted (down) Figure 2b: NE–SW-trending seismic transects showing the continuation of the top-SSW Wyville–Thomson fault zone at Wyville–Thomson Ridge. -Figure_2c: Interpreted (up) and uninterpreted (down) Figure 2c: NE–SW-trending seismic transects showing the continuation of the top-SSW Wyville–Thomson fault zone at Wyville–Thomson Ridge. -Figure_2d: Interpreted (up) and uninterpreted (down) Figure 2d: NE–SW-trending seismic transects showing the continuation of the top-SSW Wyville–Thomson fault zone at Wyville–Thomson Ridge. -Figure_2e: Interpreted (up) and uninterpreted (down) Figure 2e: WNW–ESE-trending seismic section along the Wyville–Thomson Ridge showing tens of kilometers wide, open, NNE–SSW-striking macrofolds deforming the top-SSW Wyville–Thomson fault zone. The opposite sense of shear is indicated by asymmetric folds and minor brittle thrusts on either limbs of the macrofolds, which suggests limited amount of tectonic displacement. In the northwest, the section displays gently northwest-dipping, moderate-amplitude reflections (blue lines), curving-downward reflections (black lines), and southeast-dipping disruption surfaces (black lines) interpreted respectively as SDRs, saucer-shaped sills, and dykes and sills. The later crosscut the folded Wyville–Thomson fault zone. The Wyville–Thomson fault zone and related asymmetric folds extend below and northwest of the SDRs suggesting that the Iceland–Faroe Ridge consists (at least partly) of continental crust. -Figure_2f: Interpreted (up) and uninterpreted (down) Figure 2f: ENE–WSW-trending seismic section at the Munkagrunnur Ridge showing asymmetric folds indicating top-east kinematics along the Munkagrunnur fault zone. The Z-shaped reflections suggest extensional reworking of the fault zone. -Figure_2g: Interpreted (up) and uninterpreted (down) Figure 2g: NE–SW-trending seismic transect at Munkagrunnur Ridge showing the dominance of top-NNE kinematic indicators (e.g., NNE-verging folds and top-NNE minor brittle thrusts) along the Munkagrunnur fault zone. -Figure_2h: Interpreted (up) and uninterpreted (down) Figure 2h: NW–SE-trending transect along the Munkagrunnur Ridge showing the reworking of the Munkagrunnur fault zone by a tens of kilometers wide, NNE–SSW-striking, SSW-plunging macrofold with opposite sense of shear on either flanks. -Figure_2i: Interpreted (up) and uninterpreted (down) Figure 2i: Folded portion of the West Faroe fault zone that was overprinted by a top-northwest Caledonian thrust. The listric, post-Caledonian, brittle, normal fault, which offsets the Top-basement reflection by ca. 1 second (TWT) merges with the top-northwest thrust at depth suggesting it formed along preexisting zones of weakness in the crust. Abstract of the revised, accepted version of the related manuscript \"Impact of sub-basalt thrust systems on the Faroe continental shelf for the late Paleoproterozoic–Cenozoic tectonic evolution of the margin\". Background The Faroe margin in the northeastern Atlantic is segmented by margin-orthogonal, WNW–ESE-striking lineaments extending several hundred kilometers out to the continent–ocean transition. Despite several earlier studies speculating that these features are the product of reactivation of pre-Cenozoic basement-seated...本数据集为发表于《晚古元古代-新生代边缘构造演化背景下玄武岩下逆冲系统对法罗大陆架的影响》一文中，由TGS发布的法罗群岛近海高分辨率地震反射数据。该数据由Western Geophysical于1994-1995年采集，并由TGS于2011年4月至2012年1月期间完成重新处理（Nicholson, 2012；联系TGS可获取内部重新处理报告）。Nicholson, A.: 《法罗群岛近海地震数据重新处理最终报告》，2011年4月—2012年1月，项目编号624，项目代码OF9495RE11，2012年。 本数据集为《晚古元古代-新生代边缘构造演化背景下玄武岩下逆冲系统对法罗大陆架的影响》一文的补充数据，包含以下内容： - 图2a：带解释（上）与未解释（下）的图2a：法罗群岛西侧NNE-SSW走向地震测线，显示法罗群岛近海新生代熔岩下方发育主要的NNE倾伏、顶向SSW的逆冲系统。该逆冲系统由大型糜棱剪切面（红色线条）及紧密褶皱的层理/面理面（黄色线条）构成。值得关注的小型（宽数千米至数百米）构造包括不对称褶皱（最大可至等斜平卧褶皱）、双重构造及背斜逆冲叠置体。大型海岭及高地（如威维尔-汤姆森海岭(Wyville–Thomson Ridge)）两侧的不对称褶皱构造（及糜棱剪切面）的运动学指向相反，指示构造位移量有限。苏德吕(Suðurøy)断裂带与西法罗断裂带下部存在Z型反射，指示断裂带发生了伸展型重新活化。 - 图2b：带解释（上）与未解释（下）的图2b：NE-SW走向地震测线，展示威维尔-汤姆森海岭处顶向SSW的威维尔-汤姆森断裂带的延伸情况。 - 图2c：带解释（上）与未解释（下）的图2c：NE-SW走向地震测线，展示威维尔-汤姆森海岭处顶向SSW的威维尔-汤姆森断裂带的延伸情况。 - 图2d：带解释（上）与未解释（下）的图2d：NE-SW走向地震测线，展示威维尔-汤姆森海岭处顶向SSW的威维尔-汤姆森断裂带的延伸情况。 - 图2e：带解释（上）与未解释（下）的图2e：沿威维尔-汤姆森海岭的WNW-ESE走向地震剖面，显示宽达数十公里的开放型NNE-SSW走向宏观褶皱，变形了顶向SSW的威维尔-汤姆森断裂带。宏观褶皱两翼的不对称褶皱与小型脆性逆冲构造指示相反的剪切指向，表明构造位移量有限。剖面西北部显示了平缓北西倾、中等振幅的反射（蓝色线条）、向下弯曲的反射（黑色线条）以及南东倾的错断面（黑色线条），分别被解释为向海倾斜反射体(SDRs, Seaward-dipping Reflectors)、碟状岩床以及岩脉与岩床。后期形成的岩脉与岩床穿插了褶皱后的威维尔-汤姆森断裂带。威维尔-汤姆森断裂带及相关不对称褶皱延伸至向海倾斜反射体下方及西北侧，表明冰岛-法罗海岭至少部分由大陆地壳构成。 - 图2f：带解释（上）与未解释（下）的图2f：蒙纳格兰海岭(Munkagrunnur Ridge)处ENE-WSW走向地震剖面，显示沿蒙纳格兰断裂带发育的顶东向运动学的不对称褶皱。Z型反射指示断裂带发生了伸展型改造。 - 图2g：带解释（上）与未解释（下）的图2g：蒙纳格兰海岭处NE-SW走向地震测线，显示蒙纳格兰断裂带以顶NNE向运动学指示为主（如NNE指向的褶皱及顶NNE向小型脆性逆冲构造）。 - 图2h：带解释（上）与未解释（下）的图2h：沿蒙纳格兰海岭的NW-SE走向测线，显示蒙纳格兰断裂带被宽数十公里、NNE-SSW走向、向SSW倾伏的宏观褶皱改造，两翼剪切指向相反。 - 图2i：带解释（上）与未解释（下）的图2i：西法罗断裂带的褶皱部分，被顶西北向的加里东逆冲构造叠加。铲式、加里东期后脆性正断层使基底顶面反射偏移约1秒双程旅行时(TWT, Two-Way Travel time)，在深部与顶西北向逆冲构造交汇，指示该正断层沿地壳中预先存在的软弱带形成。 以下为修订后接收的相关稿件《晚古元古代-新生代边缘构造演化背景下玄武岩下逆冲系统对法罗大陆架的影响》的摘要。 研究背景 北大西洋东北部的法罗边缘被垂直于边缘走向、走向为WNW-ESE的线性构造分割，这些构造延伸数百公里直至大陆-洋壳过渡带。尽管此前多项研究推测这些构造是前新生代基底赋存的逆冲系统重新活化的产物……