直径超过 200 千米的地球撞击坑：数值建模

IF 0.6 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS Solar System Research Pub Date : 2024-09-09 DOI:10.1134/s0038094624700370

B. A. Ivanov

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引用次数: 0

摘要

摘要迄今为止在地球上发现的三个最大的撞击坑遗迹，形成后的直径约为 200 公里。寻找更大的撞击结构痕迹的工作仍在继续。本文介绍了对比已发现的撞击坑更大的陆地撞击坑的形成过程进行数值模拟的结果。结果表明，推断的地热梯度对撞击熔化区的初始几何形状有很大影响，这可能有助于寻找深度侵蚀的古代撞击结构的遗迹。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Impact Craters on Earth with a Diameter of More than 200 km: Numerical Modeling

Abstract

The three largest impact craters, the remains of which have been found on Earth to date, had diameters of about 200 km immediately after formation. The search for traces of larger impact structures continues. This paper presents the results of numerical modeling of the formation of terrestrial impact craters larger than those already found. It is shown that the inferred geothermal gradient significantly influences the initial geometry of the impact melt region, which may facilitate the search for the remains of deeply eroded ancient impact structures.

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来源期刊

Solar System Research 地学天文-天文与天体物理

CiteScore

1.60

自引率

33.30%

发文量

审稿时长

6-12 weeks

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.