Synthesis of Fault Traces in SE Louisiana Relative to Infrastructure

Corresponding data set for Tran-SET Project No. 17GTLSU12. Abstract of the final report is stated below for reference: "Geological faulting has been implicated as a contributor to subsidence, coastal land-loss and submergence of marshlands in southern Louisiana. This report reviews whether fault motion, either by slow creep or more sudden slip, can cause deformation of engineered structures resulting in increased infrastructure maintenance and repair costs. The impact of surface, or near-surface, geologic faulting on critical infrastructure is insufficiently documented in southeastern Louisiana, but the state has a vast amount of energy-sector subsurface data that to date has been under-utilized for transportation and other near-surface engineering applications. Recent and on-going work by research groups at Tulane University, University of New Orleans, and University of Louisiana at Lafayette use energy industry subsurface data, including well data and 2D and 3D seismic reflection data to map and project deep-seated faults that have been in place for millions of years, to create provisional surface fault trace maps. Accurate characterization of active fault locations and effects using both subsurface and surface methods will aid in the design and placement of infrastructure, as well as in developing appropriate mitigation methods. Descriptive criteria for reliability of fault locations were developed and are based on resources used in the interpretation and map scale: Level 1 suspected faults – described in the literature and included here from georeferenced maps; Level 2 identified faults – those observed on 2D or 3D seismic and mapped in a geographic reference system; Level 3 confirmed faults – mapped on seismic and ground-truthed with field methods including age-dated sediment borings and high-resolution seismic. We have compiled data resources in a GIS-based system for simple retrieval and map-based review so that additional work specific to critical infrastructure projects can be prioritized. The intent is to give the public information, so that they may better assess the importance of faulting in any particular project area and as a resource to identify areas that already have energy industry seismic available."Tran-SET项目第17GTLSU12号对应的数据集。以下附上最终报告摘要以供参考： "美国路易斯安那州南部的地质断层被认为是地面沉降、海岸土地流失以及沼泽湿地淹没的诱因之一。本报告旨在探究断层运动——无论是缓慢蠕滑还是突发滑移——是否会引发工程结构变形，进而导致基础设施运维与修复成本攀升。路易斯安那州东南部的地表或近地表地质断层对关键基础设施的影响尚未得到充分记录，但该州拥有海量能源行业地下数据，迄今这些数据在交通及其他近地表工程应用中未得到充分利用。 杜兰大学、新奥尔良大学以及路易斯安那大学拉斐特分校的研究团队近期及正在开展的研究，借助能源行业地下数据（包括钻井数据与二维、三维地震反射数据(2D and 3D seismic reflection data)），对已存在数百万年的深部断层进行测绘与预测，以此生成临时地表断层迹线图。通过结合地下与地表探测手段，精准表征活动断层的位置及其影响，将有助于基础设施的设计与选址，同时助力制定恰当的减灾措施。 研究团队制定了断层位置可靠性的判定标准，该标准基于解译所使用的资源及成图比例尺：1级疑似断层——见于文献记载，并从地理参考地图中收录至此；2级已识别断层——在二维或三维地震数据中观测到，并通过地理参考系统完成测绘；3级确认断层——经地震数据测绘，并通过包括年代测定沉积物钻探与高分辨率地震(high-resolution seismic)在内的野外实地方法完成地面验证。 我们已将各类数据资源整合至地理信息系统（GIS）基础平台中，支持便捷检索与基于地图的检视，以便为关键基础设施项目的后续研究提供优先级排序依据。本数据集旨在向公众提供相关信息，帮助其更好地评估特定项目区域内断层活动的重要性，并作为识别已具备能源行业地震数据的区域的参考资源。"