基于海洋地球物理和卫星测高数据的克格伦高原海底和洋壳结构

IF 2.3 Q2 REMOTE SENSING
Polina Lemenkova
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引用次数: 0

摘要

火山形成的凯尔盖伦群岛是世界上最大的海底高原之一。克尔格伦高原位于南印度洋的偏远地区,靠近南极洲,具有复杂的构造起源和与大陆白垩纪历史相关的地质构造。这反映在与高原相邻的海洋地壳的不同年龄和凯尔格伦高原高度不均匀的水深测量上,南北段海底结构不同。海洋重力和卫星雷达测高获得的遥感数据是测绘复杂海底特征的重要信息来源。该研究结合了NOAA、EMAG2、wdam、ETOPO1和EGM96数据集的地理空间信息,对提取的海底特征的范围和分布进行了细化。地形、磁异常、构造和重力网格的制图联合分析是基于使用通用测绘工具(GMT)编程套件进行的综合测绘。水下特征(Broken Ridge, Crozet Islands,海底结构,方向和磁异常频率)的映射可以分析它们与西南印度洋自由空气重力和磁异常,地球动力学背景和海底结构的对应关系。结果表明,利用先进的制图脚本语言对数据集进行整合,提高了对海底目标的识别和可视化。结果包括11张覆盖克格伦高原和西南印度洋地区的新地图。这项研究有助于增加对法国南部和南极陆地海底结构的认识。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seafloor and Ocean Crust Structure of the Kerguelen Plateau from Marine Geophysical and Satellite Altimetry Datasets
The volcanic Kerguelen Islands are formed on one of the world’s largest submarine plateaus. Located in the remote segment of the southern Indian Ocean close to Antarctica, the Kerguelen Plateau is notable for a complex tectonic origin and geologic formation related to the Cretaceous history of the continents. This is reflected in the varying age of the oceanic crust adjacent to the plateau and the highly heterogeneous bathymetry of the Kerguelen Plateau, with seafloor structure differing for the southern and northern segments. Remote sensing data derived from marine gravity and satellite radar altimetry surveys serve as an important source of information for mapping complex seafloor features. This study incorporates geospatial information from NOAA, EMAG2, WDMAM, ETOPO1, and EGM96 datasets to refine the extent and distribution of the extracted seafloor features. The cartographic joint analysis of topography, magnetic anomalies, tectonic and gravity grids is based on the integrated mapping performed using the Generic Mapping Tools (GMT) programming suite. Mapping of the submerged features (Broken Ridge, Crozet Islands, seafloor fabric, orientation, and frequency of magnetic anomalies) enables analysis of their correspondence with free-air gravity and magnetic anomalies, geodynamic setting, and seabed structure in the southwest Indian Ocean. The results show that integrating the datasets using advanced cartographic scripting language improves identification and visualization of the seabed objects. The results include 11 new maps of the region covering the Kerguelen Plateau and southwest Indian Ocean. This study contributes to increasing the knowledge of the seafloor structure in the French Southern and Antarctic Lands.
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来源期刊
Applied Geomatics
Applied Geomatics REMOTE SENSING-
CiteScore
5.40
自引率
3.70%
发文量
61
期刊介绍: Applied Geomatics (AGMJ) is the official journal of SIFET the Italian Society of Photogrammetry and Topography and covers all aspects and information on scientific and technical advances in the geomatics sciences. The Journal publishes innovative contributions in geomatics applications ranging from the integration of instruments, methodologies and technologies and their use in the environmental sciences, engineering and other natural sciences. The areas of interest include many research fields such as: remote sensing, close range and videometric photogrammetry, image analysis, digital mapping, land and geographic information systems, geographic information science, integrated geodesy, spatial data analysis, heritage recording; network adjustment and numerical processes. Furthermore, Applied Geomatics is open to articles from all areas of deformation measurements and analysis, structural engineering, mechanical engineering and all trends in earth and planetary survey science and space technology. The Journal also contains notices of conferences and international workshops, industry news, and information on new products. It provides a useful forum for professional and academic scientists involved in geomatics science and technology. Information on Open Research Funding and Support may be found here: https://www.springernature.com/gp/open-research/institutional-agreements
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