Combination of a reaction cell and an ultra-high vacuum system for the in situ preparation and characterization of a model catalyst

分类： 核科学技术 >> 辐射物理与技术 提交时间： 2023-06-01

Yijing Zang Shucheng Shi Yong Han Hui Zhang Weijia Wang Peng Liu Mao Ye Zhi Liu

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Lithospheric loading model for large impact basin where mantle plug presents

分类： 天文学 >> 天文学 提交时间： 2023-02-19

Qingyun Deng Zhen Zhong Mao Ye Wensen Zhang Denggao Qiu Chong Zheng Jianguo Yan Fei Li Jean-Pierre Barriot

摘要： Lithosphere is an outer rigid part of the terrestrial body, usually consisting of the crust and part of the mantle. Characterizing the physical properties of the lithosphere is critical in investigating its evolution. By modeling mass-related loads within the lithosphere, physical parameters such as the elastic thickness of the lithosphere can be inferred from gravity and topography data. In the impact basin region, however, the low topography-gravity correlation and the sharp change in admittance from negative to positive within a narrow spheric harmonic degree make this model inapplicable. In this work, we incorporated mantle uplift structures commonly formed in impact basin regions into the lithospheric loading model. The crustal-mantle boundary of this mantle uplift structure is inferred from the global crustal thickness model. The gravity anomaly of the deflected lithosphere is calculated at the surface and crustal-mantle boundary, then the theoretical gravity admittance and correlation can be compared with the observed data. We sampled parameters using this mantle loading model at Argyre and Isidis basin on Mars with a novel crustal thickness model from the InSight mission. Our work suggests that proper modelling of the impact-induced load is critical to understanding the physical properties of the planetary lithosphere in the basin region.

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Lithospheric loading model for large impact basin where mantle plug presents

分类： 天文学 >> 天文学 提交时间： 2023-02-19

Qingyun Deng Zhen Zhong Mao Ye Wensen Zhang Denggao Qiu Chong Zheng Jianguo Yan Fei Li Jean-Pierre Barriot

摘要： Lithosphere is an outer rigid part of the terrestrial body, usually consisting of the crust and part of the mantle. Characterizing the physical properties of the lithosphere is critical in investigating its evolution. By modeling mass-related loads within the lithosphere, physical parameters such as the elastic thickness of the lithosphere can be inferred from gravity and topography data. In the impact basin region, however, the low topography-gravity correlation and the sharp change in admittance from negative to positive within a narrow spheric harmonic degree make this model inapplicable. In this work, we incorporated mantle uplift structures commonly formed in impact basin regions into the lithospheric loading model. The crustal-mantle boundary of this mantle uplift structure is inferred from the global crustal thickness model. The gravity anomaly of the deflected lithosphere is calculated at the surface and crustal-mantle boundary, then the theoretical gravity admittance and correlation can be compared with the observed data. We sampled parameters using this mantle loading model at Argyre and Isidis basin on Mars with a novel crustal thickness model from the InSight mission. Our work suggests that proper modelling of the impact-induced load is critical to understanding the physical properties of the planetary lithosphere in the basin region.

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