Completing the Global Seafloor Fabric and Magnetic Lineation Project

海底划线组构和磁性等时线截齿的详细描述和分布是板块运动学的基础。对这些数据进行全面和全球性的描述将是海洋地球物理研究的一个重要里程碑。自洽的数据可能会揭示出微妙的模式，并将减少由此推导出的模型参数的不确定性。板块构造重建是许多地质研究的基础。这一框架可能带来的改进将在地球科学的广泛领域中感受到。此外，全球自成一体的海底组构遗迹的可获得性将影响海洋研究的许多领域。与大多数基础设施项目一样，这一项目的性质将产生广泛的影响。所有开发的软件都将可用，并与GMT5兼容。通用地图绘制工具(GMT)是一个开放源码的工具集合，用于操作地理和笛卡尔数据集以及生成PostScript插图。研究生和本科生将参与这个项目，并学习与海洋地球物理研究和数据分析有关的宝贵技能。公众将通过数据储存库和项目网站获取这项工作的结果。该项目是先前由国家科学基金会资助的一个为期两年的试点项目(“全球断裂带和磁性划线项目”)的后续项目。上一个项目力求(A)建立一个全球断裂带的在线数据库，(B)开发基于现有网格数字化和提炼全球断裂带的MatLab软件，以及(C)提供已出版的磁力线划线采集器的在线收集。在所有方面都取得了进展，目前可以在项目网站上获得初步数据。该项目的范围已经扩大，因为断裂带的数字化必须扩大到包括其他类型的相关划线海底组构(例如扩展的裂谷、不协调带和V形异常--在今天的大洋中脊描绘出“V”形的线性重力低)。Print Investigator正在开发的软件尚未完全完成，部分原因是对最近发布的GMT5的依赖。谷歌地球被用来数字化和编写两个C程序：一个交叉轮廓分析器(fz分析器)和一个过滤工具(Fzblender)。该项目将把最初资助的工作再延长一年，以完成软件测试、文档编制和打包成补充，并最终确定网站的脚本。这个为期一年的后续项目旨在实现这些具体目标：1.利用支持脚本，完成fz分析器和fzblender的开发，使之成为GMT5的常规补编，包括一份技术报告，以记录工具、其用途和操作，并提供范例供其他人效仿。2.出版一份关于该项目的G3技术简报，从而向更广泛的潜在用户社区宣布它的可用性。3.继续通过EarthByte协作编辑磁性划线选段，并记录/自动化网站的维护。4.将大卫·桑德韦尔的不同板块边界添加到数据库中。5.确保所有数据都可以轻松导入Google Earth、GeoMapApp和GPlates，并寻求与海洋地球科学数据系统(MGDS)和NOAA国家地球物理数据中心(NGDC)建立永久存储库。

The detailed description and distribution of seafloor lineated fabric and magnetic isochron picks are fundamental to plate kinematics. A complete and global characterization of these data will represent a major milestone in marine geophysical research. Self-consistent data may reveal subtle patterns and will reduce uncertainties in model parameters deduced from them. Plate tectonic reconstructions form the basis for much geologic research. The improvements that this framework will make possible will be felt over a wide cross-section of the Earth sciences. In addition, the availability of global, self-consistent seafloor fabric traces will impact numerous lines of marine research. As with most infrastructure projects, this project will by its nature have wide impact. All software developed will be made available and compatible with GMT5. The Generic Mapping Tools, GMT, are an open source collection of tools for manipulating geographic and Cartesian data sets and producing PostScript illustrations. Graduate and undergraduate students will be involved in this project and learn valuable skills pertaining to marine geophysical research and data analysis. The public will obtain access to the results of this work via data repositories and the project web site. This project is a follow-up to a two-year previously funded NSF pilot project ("The Global Fracture Zone and Magnetic Lineation Project"). The previous project sought to (a) initiate an online database of global fracture zones (FZs), (b) develop Matlab software to digitize and refine FZs based on available grids, and (c) provide an online collection of published magnetic lineation picks. Progress has been made on all fronts with access to preliminary data presently available on the project website. The scope of the project has expanded in that the digitization of fracture zones had to be extended to include other types of related lineated seafloor fabric (such as propagating rifts, discordant zones, and V-anomalies-linear gravity lows that trace out a 'V' shape at present-day mid-ocean ridges). The software the Principle Investigator is developing is not yet fully complete, partly due to a dependency on GMT5, which has just recently been released. Google Earth is being used to digitize and write two C programs: one cross-profile analyzer (fzanalyzer) and one filtering tool (fzblender). This project will extend the initially funded work an additional year to complete the software testing, documentation, and packaging into a supplement and to finalize scripting for the website. The one-year follow-on project aims to accomplish these specific goals: 1. Complete the development of fzanalyzer and fzblender, with support scripts, into a regular GMT5 supplement, including a technical report to document tools, their purpose and operation, with examples for others to emulate. 2. Publish a G3 technical brief on the project, thereby announcing its availability to the broader community of potential users. 3. Continue the compilation of magnetic lineation picks via the EarthByte collaboration and document/automate the upkeep of the web site. 4. Add David Sandwell's divergent plate boundaries to the database. 5. Ensure all data can easily be imported into Google Earth, GeoMapApp and GPlates and seek a permanent repository with the Marine Geoscience Data System (MGDS) and NOAA's National Geophysical Data Center (NGDC).