This resulted in electrical discharges between this levels to form diatremes. To enable the readers to draw their own conclusions we quote the Khazanovich-Wulff hypothesis: A large iron-meteoroid Gibeon having entered the earth’s atmosphere induced a powerful electrical charge on the earth’s surface which interacted with electrical fields in the earth’s interiors. The ages of the Kimberlite pipes and the Brukarros structure, to which Khazanovich-Wulff denied a volcanic origin, are given with 75 Ma and Khazanovich-Wulff speculated that a regular arid climate may have existed on the Nama plateau during 75 Ma, which may have preserved the large meteorite debris among dry eolic sands. Khazanovich-Wulff added an interesting viewpoint to the current Gibeon research in suggesting that Kimberlite fields in the Gibeon area and around the Brukarros structure are related to the Gibeon meteorite strewn field (Khazanovich-Wulff 2001). (1998) detected terrestrial magnetic contamination on a Gibeon sample and the authors noted that any analysis of iron meteorites based on their magnetic properties may be compromised considerably by terrestrial influences. On occasion of their research on remnant magnetization, Fukuhara et al. Petaev concluded that the formation of these rare objects was a planetary-wide process on the IVA parent Body. Petaev suggested their formation due to accumulation of detrital mineral fragments and intergrowths without subsequent cementation, rather than crystallization from a melt or condensation from a fluid phase. In Gibeon the sulfides occur in the shape of loosely packed inequigranular, irregular metal and sulfide grains and aggregates. A feature which had previously been discovered in the Albion IVA fine octahedrite. also discovered brassy metal-troilite-daubrelite masses and sulfide bearing vugs in Gibeon cut sections (Petaev et al. The mineral, which was previously described in terrestrial occurrences, was discovered in a Gibeon section. delivered the first report on eskolaite in meteorites. Considering the trace amounts of silicia Scott stated that either a small size of the mother body caused inefficient removal of trapped silicate liquid, or, alternatively, that temperatures occurring on the Gibeon mother body were never sufficient to melt the mantle entirely (Scott et al. Several researchers noted the unusual content of silicates in Gibeon (e.g. Pools this size quickly sink through the silicate and the authors conclude that the Gibeon IVA material very probably comes from an asteroidal core. pointed out that the parental liquid pool of the Gibeon meteorite on the IVA mother body was at least many meters in size. In addition to the work of Malvin et al., Scott et al. 16 Psyche) as a possible source of origin for Gibeon and other IVA iron meteorites. Matsui’s results underlined that the brittle behavior of iron-like planetesimals in the low-temperature asteroid zone prevents the growth of these bodies into full-size planets.īased on their study of bidirectional reflectance properties including Gibeon samples Britt et al. Consequently, even if IVA iron meteorites were originally the core of a layered parent body, they might be subsequently destroyed in a brittle manner. Their experiments revealed the brittle behaviour of the material at low temperatures. (1984) simulated high and low-velocity impacts into Gibeon material. They were declared a National Monument in February of 1950.Several researchers investigated the brittle-ductile systematics of the IVA mother body with interesting results. However, 30 of these prehistoric extraterrestrial wonders are available for all to see on the Post Street Mall in Windhoek. Upwards of 150 meteorites were tracked and recovered since the captain’s 19th-century report, though quite a few of the valuable specimens were either stolen and smuggled out of the country or donated to various international research institutions. He sent a sample back to London, where prominent astronomer Sir John Herschel noticed its high quantity of nickel and declared it came from an iron meteorite. Alexander, an Englishman, found them during his 1838 travels. The space rocks gained international attention after Captain J.E. Even before the start of the Iron Age, local people used the meteorites to make iron tools and weapons. While on its Earthbound journey, it shattered, sending more than 100 meteorites shooting toward the planet, leaving blazing trails in their wake.Ī large portion of the space rocks were found around the village of Gibeon, earning them the name Gibeon Meteorites. About 600 million years ago, a massive meteoroid hurtled through space before crashing into the land that would, many millennia later, become known as Namibia.
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