The 3D subsurface structures of the Atlas impact crater revealed by GRAIL gravity data
文献类型：期刊论文
| 作者 | Liu, Niannian4; Yan, Jianguo3,4; Chisenga, Chikondi2; Saibi, Hakim1; Qiu, Denggao4; Brave, Manda4; Barriot, Jean-Pierre4 |
| 刊名 | ICARUS
 |
| 出版日期 | 2026-05-15 |
| 卷号 | 450页码:17 |
| 关键词 | Atlas crater Floor-fractured crater Central peak complex Gravity inversion 3D density structure |
| ISSN号 | 0019-1035 |
| DOI | 10.1016/j.icarus.2026.116976 |
| 通讯作者 | Yan, Jianguo(jgyan@whu.edu.cn) |
| 英文摘要 | The Moon's Atlas crater, centered at approximately 47 degrees N, 44 degrees E and with a diameter of similar to 87 km, is a typical floorfractured crater (FFC) in the northeastern lunar highlands. The presence of a fractured crater floor, asymmetric uplift, and dark lava deposits within this impact crater may indicate the combined effects of multi-stage processes accompanying the impact event and subsequent magmatic intrusion. Despite the fact that the surface geological information is available from remote sensing studies, the link between subsurface processes and the effects of the multiple impacts that shaped those surface manifestations is still elusive. To bridge the limitations of subsurface structures detected in remote sensing and morphological studies and to provide a preliminary subsurface structural interpretation linked to past geological processes, we performed 3D density inversion based on Bouguer gravity data (60-600 degree band-pass-filtered) from the Gravity Recovery and Interior Laboratory (GRAIL) 1200-degree gravity model. We employed multidirectional regularization and depth-weighted linear model constraints in a spherical coordinate system to reduce the non-uniqueness of the inversion results. The modeled densities reveal a west-to-east-decreasing density gradient (highly consistent with the observed nonaxisymmetric surface uplift) and two discrete independent high-density anomalies outside the Atlas crater. The former reflects the multi-phase magmatic intrusion history and impact-influenced evolution of the Atlas crater (forming the main magma intrusion system), while the latter are interpreted as a regional magmatic dike and a small-scale impact melt zone, unrelated to Atlas's formation. These findings provide direct evidence for the genetic mechanism (coupling between impact modification and magmatic activity) of lunar highland FFCs. The shallow high-density anomaly, which corresponds to high-Ti basalt, may contain Fe-Ti-rich minerals, as also observed from remote sensing studies, making it a potential high-priority target for future in-situ resource utilization. |
| WOS关键词 | 3-D INVERSION ; SOURCE DEPTHS ; LUNAR ; MOON ; INTRUSIONS ; REGION ; CRUST ; EMPLACEMENT ; GENERATION ; ANOMALIES |
| 资助项目 | National Natural Science Foundation of China[42241116] ; National Natural Science Foundation of China[42402230] ; National Key Research and Development Program of China[2022YFF0503202] ; The 2022 Project of Xinjiang Uygur Autonomous Region of China for Heaven Lake Talent Program |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001687086400001 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; The 2022 Project of Xinjiang Uygur Autonomous Region of China for Heaven Lake Talent Program |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8564]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Yan, Jianguo |
| 作者单位 | 1.United Arab Emirates Univ, Coll Sci, Dept Geol, Al Ain, U Arab Emirates 2.Malawi Univ Sci & Technol, Ndata Sch Climate & Earth Sci, Dept Earth Sci, POB 5196, Limbe, Malawi 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & Re, Wuhan 430079, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Niannian,Yan, Jianguo,Chisenga, Chikondi,et al. The 3D subsurface structures of the Atlas impact crater revealed by GRAIL gravity data[J]. ICARUS,2026,450:17. |
| APA | Liu, Niannian.,Yan, Jianguo.,Chisenga, Chikondi.,Saibi, Hakim.,Qiu, Denggao.,...&Barriot, Jean-Pierre.(2026).The 3D subsurface structures of the Atlas impact crater revealed by GRAIL gravity data.ICARUS,450,17. |
| MLA | Liu, Niannian,et al."The 3D subsurface structures of the Atlas impact crater revealed by GRAIL gravity data".ICARUS 450(2026):17. |
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来源：新疆天文台
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