Remote-sensing-data-based geological mapping method of lunar-surface impact crater

Abstract

The invention discloses a remote-sensing-data-based geological mapping method of a lunar-surface impact crater. The method comprises: carrying out data processing on a lunar surface image and topographic data; determining an absolute age of an impact crater; identifying a linear structure of the impact crater; carrying out geological unit division of an impact crater; and with a DEM covering an impact crater region and image data, carrying out identification of feature points corresponding to topographic relief and luminosity changing and connecting the feature points expressing the same unitsand using feature lines as boundary lines of different geological units of the two-dimensional impact crater plane. With the method disclosed by the invention, a high-spatial-resolution impact cratergeological map with integration of the landform and geological information is generated and is used as an important basic map and component for the lunar regional geological map drawing, so that needs of follow-up lunar geological evolution and scientific moon study are met.

Description

technical field [0001] The invention relates to the technical fields of planetary remote sensing and planetary geology, in particular to a method for geological mapping of lunar surface impact craters based on remote sensing data. Background technique [0002] The moon is the first choice for human deep space exploration, and has a special status in the development and utilization of outer space. There is no atmosphere, water and life on the moon, and the influencing factors of the moon's morphology are mainly the dynamic magma effect inside the moon and the dynamic impact effect outside the meteorite. Impact craters are ring-shaped depressions formed on the surface of planets, moons, asteroids, or other terrestrial bodies as a result of meteorite impacts. The shape of the impact craters on the lunar surface can be divided into three types according to the diameter gradually increasing: simple impact craters, complex impact craters and impact basins. The shape of simple an...

AI Technical Summary

Problems solved by technology

On the 1:5 million lunar geological map of the United States, although all lunar surface impact craters with a diameter greater than 10 km are identified, they are only described as a single geological unit (crater material), and the five units of the impact crater are not separately analyzed. division, the morphology and structure information of each part is not expressed in detail

[0006] In addition, on the previous geological map of the moon, the formation age of the impact crater was only roughly estimated based on the superposition relationship of the strata, and the absolute age was not determined.

[0007] Finally, the resolution of the impact craters on the previous lunar geological map is too low. Taking the 1:5 million lunar geological map as an example, the size of the lunar surface impact crater with a diameter of 20km is only 4cm on the map, which is low. The spatial resolution is difficult to clearly express and synthesize the details of the impact craters on the lunar surface

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