{"title":"Impact Crater with Traces of Tectonic Deformation in the South Polar Region of the Moon","authors":"A. T. Basilevsky, S. S. Krasilnikov, M. A. Ivanov","doi":"10.1134/s0038094624010027","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\n<b>Abstract</b>—</h3><p>The work examines the structure of a crater with a diameter of 34 km, located on the mainland in the marginal zone of the south polar region of the Moon within the South Pole–Aitken impact basin. This crater belongs to the Dawes morphological type, which is characterized by a generally flattened, and in detail uneven, hilly-ridge bottom surface. The crater under study has a fractured bottom, which is considered a sign of magma intrusion into the subcrater space. Cracks in the bottom material are represented by hollows from 2 to 10 km long, 0.3–1 km wide and 50–150 m deep. The LROCNAC images show that in the hilly-ridge areas of the bottom the regolith surface has a “wrinkled” texture, and in the subhorizontal areas it is smooth. On one of the sections of the bottom there is a 700-meter crater, the rim of which touches one of the hollows. Judging by the morphology of this crater and the absence of meter-sized stones on its shaft, it was formed in the range of (200–300) million to 1 billion years ago, while the age of the studied 34-kilometer crater is estimated from the density of small craters superimposed on its rim as 3.83 (+0.025; –0.031) billion years. The age of the surface material of the deformed bottom of the crater under study is in the range of (200–300) million to 1 billion years. Probably, the fracturing of the bottom (formation of hollows) was caused by the penetration of an intrusive body or bodies into the subcrater space during the Copernican or early Eratosthenesian periods of the geological history of the Moon. The 34-kilometer crater in question certainly deserves further study.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":null,"pages":null},"PeriodicalIF":0.6000,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solar System Research","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1134/s0038094624010027","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract—
The work examines the structure of a crater with a diameter of 34 km, located on the mainland in the marginal zone of the south polar region of the Moon within the South Pole–Aitken impact basin. This crater belongs to the Dawes morphological type, which is characterized by a generally flattened, and in detail uneven, hilly-ridge bottom surface. The crater under study has a fractured bottom, which is considered a sign of magma intrusion into the subcrater space. Cracks in the bottom material are represented by hollows from 2 to 10 km long, 0.3–1 km wide and 50–150 m deep. The LROCNAC images show that in the hilly-ridge areas of the bottom the regolith surface has a “wrinkled” texture, and in the subhorizontal areas it is smooth. On one of the sections of the bottom there is a 700-meter crater, the rim of which touches one of the hollows. Judging by the morphology of this crater and the absence of meter-sized stones on its shaft, it was formed in the range of (200–300) million to 1 billion years ago, while the age of the studied 34-kilometer crater is estimated from the density of small craters superimposed on its rim as 3.83 (+0.025; –0.031) billion years. The age of the surface material of the deformed bottom of the crater under study is in the range of (200–300) million to 1 billion years. Probably, the fracturing of the bottom (formation of hollows) was caused by the penetration of an intrusive body or bodies into the subcrater space during the Copernican or early Eratosthenesian periods of the geological history of the Moon. The 34-kilometer crater in question certainly deserves further study.
期刊介绍：
Solar System Research publishes articles concerning the bodies of the Solar System, i.e., planets and their satellites, asteroids, comets, meteoric substances, and cosmic dust. The articles consider physics, dynamics and composition of these bodies, and techniques of their exploration. The journal addresses the problems of comparative planetology, physics of the planetary atmospheres and interiors, cosmochemistry, as well as planetary plasma environment and heliosphere, specifically those related to solar-planetary interactions. Attention is paid to studies of exoplanets and complex problems of the origin and evolution of planetary systems including the solar system, based on the results of astronomical observations, laboratory studies of meteorites, relevant theoretical approaches and mathematical modeling. Alongside with the original results of experimental and theoretical studies, the journal publishes scientific reviews in the field of planetary exploration, and notes on observational results.
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