Popigai and Chicxulub craters: multiple impacts and their associated grabens

IF 3.2 2区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Solid Earth Pub Date : 2024-04-26 DOI:10.5194/egusphere-2024-866

Jaroslav Klokocnik, Vaclav Cilek, Jan Kostelecky, Ales Bezdek

引用次数: 0

Abstract

Abstract. More advanced data (gravity field model EIGEN 6C4 with GOCE gradiometry data instead of EGM2008) and more sophisticated method (using a set of the gravity aspects instead of the gravity anomalies and the radial second derivative of the disturbing potential only) enable a deeper study of various geological features, here the impact craters Chicxulub and Popigai. We confirm our results from 2010, extend them, and offer more complicated models, namely by means of the gravity strike angles. Both craters are double or multiple craters. The probable impactor direction is from NE for Chicxulub and SE-NW for Popigai. The both crater formations seem to be associated with impact induced tectonics that triggered development of impact grabens.

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波皮盖和奇克苏卢布环形山：多重撞击及其相关地堑

摘要更先进的数据（重力场模型 EIGEN 6C4 与全球海洋观测卫星梯度测量数据，而不是 EGM2008）和更复杂的方法（使用一组重力方面，而不是仅使用重力异常和扰动势的径向二阶导数）使我们能够更深入地研究各种地质特征，这里指的是撞击坑 Chicxulub 和 Popigai。我们确认了 2010 年的研究结果，并对其进行了扩展，通过重力撞击角提供了更为复杂的模型。这两个陨石坑都是双重或多重陨石坑。奇克苏卢布的撞击方向可能是东北方向，波皮盖的撞击方向可能是东南-西北方向。这两个陨石坑的形成似乎都与撞击引起的构造有关，撞击引发了地堑的发育。

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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来源期刊

Solid Earth GEOCHEMISTRY & GEOPHYSICS-

CiteScore

6.90

自引率

8.80%

发文量

审稿时长

4.5 months

期刊介绍： Solid Earth (SE) is a not-for-profit journal that publishes multidisciplinary research on the composition, structure, dynamics of the Earth from the surface to the deep interior at all spatial and temporal scales. The journal invites contributions encompassing observational, experimental, and theoretical investigations in the form of short communications, research articles, method articles, review articles, and discussion and commentaries on all aspects of the solid Earth (for details see manuscript types). Being interdisciplinary in scope, SE covers the following disciplines: geochemistry, mineralogy, petrology, volcanology; geodesy and gravity; geodynamics: numerical and analogue modeling of geoprocesses; geoelectrics and electromagnetics; geomagnetism; geomorphology, morphotectonics, and paleoseismology; rock physics; seismics and seismology; critical zone science (Earth''s permeable near-surface layer); stratigraphy, sedimentology, and palaeontology; rock deformation, structural geology, and tectonics.