| 基于GRAIL重力数据的月球深部断裂识别和空间分布研究 |
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| 引用本文： | 陆天启,陈圣波,朱凯.基于GRAIL重力数据的月球深部断裂识别和空间分布研究[J].地球物理学报,2019,62(8):2835-2844. |
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| 作者姓名： | 陆天启 陈圣波 朱凯 |
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| 作者单位： | 吉林大学地球探测科学与技术学院, 长春 130026 |
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| 基金项目： | 国家自然科学基金面上项目（41772346），中国科学院B类先导科技专项培育项目（XDPB11-01-04），国家科技基础性工作专项（2015FY210500）和国家自然科学基金重大项目（41490634）联合资助. |
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| 摘 要： | 月球深部断裂是研究月球早期应力场演化和动力机制的一类重要构造.本文基于GRAIL月球重力数据计算了全月布格重力梯度，在此基础上对月球深部断裂进行了全球绘制，共识别月球深部断裂226条.计算了断裂的长度和走向等基本参数，断裂总长度达到37137 km，平均长度为164 km.统计月球深部断裂在不同范围内的分布情况，发现多数断裂分布在月球的中低纬度地区，且北半球的断裂多于南半球.此外，大型月海集中区所在的纬向带断裂分布最多，断裂经向分布最多的区域为风暴洋的西侧.从全球尺度和不同经纬度带绘制断裂走向玫瑰花图，总体上月球全球尺度上的深部断裂表现出NE-SW和NW-SE的优势走向，不同经度带断裂的优势走向变化不明显，但在纬度带上有显著的变化.南北半球的中纬度带和高纬度带具有相同的优势走向，分别为NE-SW和NW-SE、E-W，在低纬度带的优势走向有所差异，分别是南半球的NE-SW和NW-SE以及北半球的N-S.
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| 关 键 词： | 月球 重力数据 深部断裂 全球制图 分布特征 |
| 收稿时间： | 2019-04-12 |
Global identification and spatial distribution of lunar subsurface faults from GRAIL gravity data |
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| LU TianQi,CHEN ShengBo,ZHU Kai.Global identification and spatial distribution of lunar subsurface faults from GRAIL gravity data[J].Chinese Journal of Geophysics,2019,62(8):2835-2844. |
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| Authors: | LU TianQi CHEN ShengBo ZHU Kai |
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| Institution: | College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China |
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| Abstract: | Lunar subsurface fault is an important tectonic for studying the evolution and dynamic mechanism of stress field in early history of the Moon. The Bouguer gravity gradients were calculated based on the Gravity Recovery and Interior Laboratory(GRAIL)gravity data of the Moon. On this basis, lunar subsurface faults were globally mapped. A total of 226 subsurface faults were identified. The basic parameters,including length and orientation were calculated in this study. The total length of all the faults was 37137 km,and the mean length was 164 km. Statistical distribution of lunar subsurface faults ranged differently. The results showed that most of the faults are distributed in the low and middle latitudes,and there are more faults in the northern hemisphere than that in the southern hemisphere. Furthermore,in the latitudinal zone the most faults are found where the largest concentration of mare occurs. The area with the largest distribution of faults is the western side of the Procellarum in meridional direction. The rose diagrams of the orientations of faults were drawn globally and at different latitudes and longitudes respectively. All subsurface faults showed a statistical NE-SW and NW-SE preferred orientations. The preferred orientation of faults had no obvious changes at different longitudes, however, it changed significantly at different latitudes. The middle and high latitudes of the southern and northern hemispheres had the same preferred orientations,namely NE-SW and NW-SE,E-W,while the low latitude's orientations were different,that is,NE-SW and NW-SE in the southern hemisphere and N-S in the northern hemisphere. |
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| Keywords: | Moon Gravity data Subsurface fault Global mapping Distribution characteristic |
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