000196313 001__ 196313
000196313 003__ CZ-ZdVUG
000196313 005__ 20210823105653.0
000196313 041__ $$aeng
000196313 040__ $$aABC039$$bcze
000196313 1001_ $$aKostelecký, Jan
000196313 24510 $$aGravity strike angles: A modern approach and tool to estimate the direction of impactors of meteoritic craters
000196313 300__ $$a16 stran
000196313 5203_ $$aThe conditions of meteoritic impacts are generally unknown. It is not easy to estimate the impactor direction; a general solution to this problem does not exist. We seek an estimate of the impactor direction by means of a novel method; it is based on the gravity aspects (descriptors). These are various functions of the gravitational potential. They are derived from the global gravitational field models expressed in harmonic geopotential coefficients, collected and computed by other authors from various satellite and terrestrial data. We discovered that especially the gravity aspect called the strike angle is appropriate to assess the impactor direction in specific circumstances. We want to detect if the strike angles contain any anisotropy. We observe that the strike angles are combed within a certain distance from the impact craters owing to the peculiarities of the impact event (substrate and impactor conditions). They provide evidence about the stress anisotropy, specifically about the target material and in some cases about the impactor direction. The strike angles seem to be parallel to the weakness in the strength of the rock, e.g. direction schistosity and or presence of the microfaults. The strike angles probably follow the anisotropy of the rocks changed by the impact explosion. It is known from the literature that disrupted rocks in proximity to impact structures contain economically useful minerals and even hydrocarbon deposits. We present examples for the Earth and the Moon (craters, mare, catenae), using the recent gravity models EIGEN 6C4 and GRGM1200A,
000196313 655_4 $$ačlánek v časopise
000196313 7001_ $$aKlokočník, Jaroslav
000196313 7001_ $$aBezděk, Aleš
000196313 7001_ $$aKletetschka, Gunther
000196313 7730_ $$92020$$dSpojené království Velké Británie a Severního Irska,2020.$$g194. (DEC 2020), 16 s.$$tPLANETARY AND SPACE SCIENCE$$x0032-0633
000196313 8564_ $$uhttps://www.sciencedirect.com/science/article/abs/pii/S0032063320303263
000196313 85642 $$ahttps://www.isvavai.cz/riv?s=rozsirene-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F20%3AN0000016%21RIV21-MSM-00025615
000196313 910__ $$aABC039
000196313 980__ $$aclanky_vugtk
000196313 985__ $$akosteleckyjan
000196313 985__ $$ariv
000196313 985__ $$autvar24