气候变化领域集成服务门户(CCPortal): Magma ascent at floor-fractured craters diagnoses the lithospheric stress state on the Moon

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DOI	10.1016/j.epsl.2019.115889
	Magma ascent at floor-fractured craters diagnoses the lithospheric stress state on the Moon
	Michaut C.; Pinel V.; Maccaferri F.
发表日期	2020
ISSN	0012821X
卷号	530
英文摘要	On the Moon, floor-fractured craters (FFCs) present evidence of horizontal crater-centred magmatic intrusions. Crater floor uplift and moat formation indicate that these sill intrusions occur at shallow depths (<10 km). While a recent study has demonstrated that magma ascent below FFCs and mare-filled craters was triggered by crater unloading, the mechanism leading to the emplacement of shallow sills is still poorly understood. Here we show that the local stress field due to crater unloading is also responsible for the horizontalisation of the magma flow leading to sill-like intrusions. On Earth, caldera formation has been shown to similarly affect magma trajectories, inducing the formation of a sill-shaped storage zone. Magma ascent to shallow depths below FFCs was however made possible because of a regional tensional stress caused by mare loading on the lunar lithosphere. We show that the tensional stress generated by elastic lithosphere deformation caused by mare loading combined to the local crater stress field can explain the distribution of FFCs on the Moon, with the smallest FFCs being located over a larger distance range from the mare. In particular, FFCs distribution around Oceanus Procellarum is consistent with an average load thickness of ∼1 km. This study suggests that magma trajectory in the crust of terrestrial planets can provide a diagnostic of the lithospheric structure and state of stress. © 2019 Elsevier B.V.
关键词	crustal stress field floor-fractured crater lunar mare magma intrusion magma path
英文关键词	Floors; Fracture; Moon; Unloading; Crustal stress; Elastic lithosphere; Lithospheric structure; lunar mare; Magma intrusion; magma path; Magmatic intrusions; Terrestrial planets; Stress analysis; crater; lithosphere; lunar mantle; magma; Moon; sill; stress field; trajectory; unloading
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202785
作者单位	Laboratoire de Géologie de Lyon, Université de Lyon, Ecole Normale Supérieure de Lyon, Université Lyon-1, CNRS, UMR 5276, 46 allée d'Italie, Lyon, F-69364, France; Université Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, 38000, France; German Research Centre for Geoscience (GFZ), Telegrafenberg, Potsdam, 14473, Germany; Istituto Nazionale di Geofisica e Vulcanologia INGV, Osservatorio Vesuviano, Napoli, Italy
推荐引用方式 GB/T 7714	Michaut C.,Pinel V.,Maccaferri F.. Magma ascent at floor-fractured craters diagnoses the lithospheric stress state on the Moon[J],2020,530.
APA	Michaut C.,Pinel V.,&Maccaferri F..(2020).Magma ascent at floor-fractured craters diagnoses the lithospheric stress state on the Moon.Earth and Planetary Science Letters,530.
MLA	Michaut C.,et al."Magma ascent at floor-fractured craters diagnoses the lithospheric stress state on the Moon".Earth and Planetary Science Letters 530(2020).