Completing the Global Seafloor Fabric and Magnetic Lineation Project

完成全球海底结构和磁力线项目

• 批准号: 1434069
• 负责人: Paul Wessel
• 金额: $ 3.55万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-01 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1434069&HistoricalAwards=false
• 关键词: Completing; Global; Seafloor; Fabric; Magnetic

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).

海底线性组构和磁性等时线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面的定性将是海洋地球物理研究的一个重要里程碑。自洽的数据可以揭示微妙的模式，并将减少从中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。这一框架所带来的改进将在地球科学的广泛领域得到体现。此外，全球自洽海底结构痕迹的可用性将影响海洋研究的许多方面。正如大多数基础设施项目一样，这项工程的性质将产生广泛的影响。开发的所有软件都将提供并与GMT 5兼容。通用制图工具GMT是一个开源的工具集合，用于操作地理和笛卡尔数据集并生成地图插图。研究生和本科生将参与这个项目，并学习有关海洋地球物理研究和数据分析的宝贵技能。公众将通过数据储存库和项目网站获得这项工作的结果。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（“全球断裂带和磁线理项目”）的后续项目。上一个项目的目的是：（a）建立一个全球断裂带在线数据库;（B）开发Matlab软件，根据现有网格对断裂带进行加密和细化;（c）在线收集已公布的磁性线理。在各个方面都取得了进展，目前可在项目网站上查阅初步数据。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线性海底组构（如扩展裂谷、不整合带和V型异常-在现今洋中脊描绘出“V”形的线性重力低）。首席研究员正在开发的软件尚未完全完成，部分原因是依赖于最近发布的GMT 5。Google Earth被用来编译和编写两个C程序：一个是跨配置文件分析器（fzanalyzer），另一个是过滤工具（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材料，并最终确定网站的脚本。为期一年的后续项目旨在实现这些具体目标：1。使用支持脚本完成fzanalyzer和fzblender的开发，并将其纳入常规的GMT 5补充，包括一份技术报告，以记录工具、其用途和操作，并提供示例供他人模仿。2.发布关于该项目的G3技术简报，从而向更广泛的潜在用户社区宣布其可用性。3.继续通过EarthByte协作汇编磁线理选择，并记录/自动化网站的维护。4.把大卫·桑德威尔的分散板块边界加入数据库。5.确保所有数据都可以轻松导入到Google Earth、GeoMapApp和GPlets中，并寻求海洋地球科学数据系统（MGDS）和NOAA国家地球物理数据中心（NGDC）的永久存储库。