The Lunar Concentric Crater Archytas G Associated with an Intrusive Dome
نویسنده
چکیده
Introduction: Lunar concentric craters represent an anomalous type of impact structures on the Moon [1]. The concentric crater Archytas G in mare Frigoris has first been catalogued as a concentric crater in [2]. According to Fig. 1, it is located on top of a large lunar intrusive dome, termed Ar1 in [3]. The dome Ar1 is the only lunar dome known to date with a concentric crater on its surface. In this contribution we estimate the morphometric properties of Archytas G and of Ar1. Modelling the intrusive dome as the result of flexure-induced uplift by a laccolithic intrusion according to [4] allows to estimate the intrusion depth and the magma pressure occurring during dome formation. Based on our analyses, we discuss possible modes of formation for Archytas G.
منابع مشابه
Effusive Lunar Domes near Kepler and Piccolomini: Morphometry and Mode of Emplacement
Introduction: Lunar domes are smooth low features similar to low terrestrial shield volcanoes. They were formed during the terminal phases of lunar eruptions and mostly occur in the maria. A few domes have been reported in the highlands, but these are usually difficult to observe because of the brightness and ruggedness of the surrounding terrain. According to [1,2], constructional volcanic fea...
متن کاملLunar red spots: Stratigraphic sequence and ages of domes and plains in the Hansteen and Helmet regions on the lunar nearside
[1] Basaltic mare materials extruded between ∼ 4 Ga and ∼ 1.2 Ga ago and formed large expanses on the lunar nearside. In contrast to the maria, volcanic shields, domes, and cones also occur but cover only a small area of the total lunar surface. One specific type of dome is characterized (1) by steep slopes, (2) by a high albedo similar to lunar highlands, and (3) by a strong absorption in the ...
متن کاملInterpreting Mascon Wrinkle Ridges on Isidis Planitia, Mars Using Axial Surface Mapping Techniques: Reconstructing Structural Development and Stress Environments
Introduction: Isidis Planitia, a Noachian impact crater infilled with Hesperian aged basalts, is located on Mars on the crustal dichotomy and is antipodal to the Tharsis rise [1]. Measuring 1400 km across and 2 km deep, it is comparable in scale and age to lunar mascons. The basin contains an interesting pattern of both radial and concentric wrinkle ridges (see Figure 1), and massive graben are...
متن کاملThe lunar Gruithuisen silicic extrusive domes: Topographic configuration, morphology, ages, and internal structure
The Gruithuisen domes, situated on the western portion of the Imbrium basin rim, form three tall mountains (NW, Gamma, Delta) totaling ∼780 km 3 in volume. The shapes of the domes are significantly different from that of mare-type domes elsewhere on the Moon. We use data from the Lunar Reconnaissance Orbiter (LRO) and Kaguya missions (LRO Lunar Orbiter Laser Altimeter, Lunar Reconnaissance Orbi...
متن کاملMartian Intrusions Possible Sites and Implications
Both the Moon and Mars exhibit volcanic modification of impact craters characterized by subfloor intrusions that either lift the old crater floor or result in extrusions of lava. Endogenic modification of martian craters, however, probably has involved interactions between such intrusive bodies and permafrost, as suggested ,by differences between lunar and martian floor-fractured craters. Sucl•...
متن کامل