The white enstatite crystals stand out against the darker gray minerals in the matrix. it also contains amphibole, which is not often found in meteorites.
Type: Achondrite
Mount Egerton
Four fragments, totalling 1.7kg, submitted for examination by M.T.Gaffney from a place 12 miles from Mt. Egerton (coordinates given), consist of Fe-Ni metal with 6.38% Ni embedded in large crystals of enstatite, one of which measures 8.5 x 5 x 2.8 cm; schreibersite, troilite, and possibly oldhamite are present, H.Bowley, Ann. Rep. Dept. Mines West. Austr. for 1942, 1944, p.76, M.H.Hey, Cat. Met., 1966, p.322. Description, G.J.H.McCall, Min. Mag., 1965, 35, p.241. Listed, Spec. Publ. West. Austr. Mus., 1965, (3), p.42. In December 1963, further specimens, totalling 250g, were found. An additional find of thousands of small fragments, of total weight about 20kg, was made in June 1966, 8 miles from the summit of Mount Egerton towards no.3 well, 24
Northwest Africa 492
Listed, with mineral analysis and classification (by M.Killgore and G.Huss (Univ. Arizona)), J.N.Grossman and J.Zipfel, Met. Bull. 85, MAPS, 2001, 36 (Suppl.), p.A293.
Hughes 026
Still the rarest group of meteorites described as a dunitic wehrlite, primarily composed of olivine 79%-93%.
Ibitira
the fireball passed northwestward and accompanied with a noise like the reverberation of thunder has been observed. This phenomenon has been marked in the radius about 160 km. At the end point of the trajectory the fireball was broken up and disappeaÂred at the height about 10 or 12 km above the earth’s surface. The meteorite was found near the predicted point of the fall, in the village Ibitira. It lay in a hole in the ground about 25 cm deep and 20 cm in diameter. The meteorite has a brilliant black crust, and a light brown. It was brought to the Institute of Technological Researches (Belo Horizonte). PreÂliminary chemical analysis show the presence, in deÂcreasing order of abundance, of silicon, magnesium, iron, aluminum, calcium, chromium, and titanium. Spectroscopic examination reveals lines of sulphur and manganese, but there were no signs of sodium, nickel and cobalt.
Johnstown
After four explosions, twenty-seven stones fell near Johnstown; the total weight recovered was about 40.25kg, and the largest stone weighed about 23.5kg, M.H.Hey, Cat. Met., 1966, p.223. Description, E.O.Hovey et al., Am. Mus. Novit., 1925, (203). Al-26 data, K.Fuse and E.Anders, GCA, 1969, 33, p.653. Minor and trace element composition of orthopyroxene, B.Mason and A.L.Graham, Smithson. Contrib. Earth Sci., 1970, (3). Bulk analysis, 12.9% total Fe, B.Mason and E.Jarosewich, Meteoritics, 1971, 6, p.241. M
Kapoeta
A stone of 11.355kg fell on the Kapoeta-Nathalani road, K.Fredriksson and K.Keil, GCA, 1963, 27, p.717, M.H.Hey, Cat. Met., 1966, p.230. Described and analyzed, 13.96% total Fe, B.Mason and H.B.Wiik, Am. Mus. Novit., 1967, (2273). Contains crystals evenly irradiated by solar flare particles, P.Pellas et al., Nature, 1969, 223, p.272. Distribution of He, Ne and Ar, G.H.Megrue, Meteorite Research, ed. P.M.Millman, D.Reidel, Dordrecht-Holland, 1969, p.922. Xe isotopic composition of dark material, M.W.Rowe, GCA, 1970, 34, p.1019. Fossil track studies, L.Wilkening et al., Earth Planet. Sci. Lett., 1970, 10, p.334. Volatile and siderophile trace element abundances, J.C.Laul et al., GCA, 1972, 36, p.329. Noble gas isotopic variations, D.C.Black, GCA, 1972, 36, p.347. Partial INAA, R.A.Schmitt et al., Meteoritics, 1972, 7, p.131. Contains carbonaceous chondrite xenoliths, L.L.Wilkening, GCA, 1973, 37, p.1985. Analysis of olivine, Fa11-35, C.Desnoyers and D.Y.J
Kenna
A single stone of 10.9kg was found by Ivan E. Wilson on his father’s ranch, 4 miles N and 13 miles E of Kenna, K.Keil, GCA, 1976, 40, p.1427. Petrology and mineralogy, olivine Fa20.8, J.L.Berkley et al., GCA, 1976, 40, p.1429. Major and trace element contents, W.V.Boynton et al., GCA, 1976, 40, p.1439. Siderophile trace element abundances, J.T.Wasson et al., GCA, 1976, 40, p.1449. Analysis of carbon and sulfur, E.K.Gibson,Jr., GCA, 1976, 40, p.1459; Meteoritics, 1975, 10, p.405 (abs.). Noble gases and fossil particle track densities, L.L.Wilkening and K.Marti, GCA, 1976, 40, p.1465. Oxygen isotopic composition, R.N.Clayton et al., GCA, 1976, 40, p.1475; Earth Planet. Sci. Lett., 1976, 30, p.10. Al-26 data, P.J.Cressy, GCA, 1976, 40, p.1477. Study of carbonaceous matrix, J.L.Berkley et al., Geophys. Res. Lett., 1978, 5, p.1075. Mineralogy and petrology, classification, low shock level, J.L.Berkley et al., GCA, 1980, 44, p.1579. Consortium study, K.Keil, GCA, 1976, 40, p.1427, A.L.Graham et al., Cat. Met., 1985, p.190. Chemical composition of olivines, J.V.Smith et al., J. Geophys. Res., 1983, 88 (suppl.), p.B229. Carbon and nitrogen isotopic composition, M.M.Grady et al., GCA, 1985, 49, p.903. Noble gas contents of carbonaceous residues, J.F.Wacker, GCA, 1986, 50, p.633. Trace element analysis of bulk material and carbonaceous vein separate, M.-J.Janssens et al., GCA, 1987, 51, p.2275. LREE enrichment found in carbon-rich areas, A.H.Spitz et al., LPSC, 1988, 19, p.1111 (abs.). Oxygen isotopic composition, R.N.Clayton and T.K.Mayeda, GCA, 1988, 52, p.1313. Sm-Nd dating, C.A.Goodrich et al., LPSC, 1989, 20, p.347 (abs.). Pb isotopic composition, F.Begemann and S.Schmitt-Strecker, Meteoritics, 1990, 25, p.349 (abs.). Cosmogenic radionuclide data, D.Aylmer et al., GCA, 1990, 54, p.1775; see also, LPSC, 1989, 20, p.30 (abs.). Sm-Nd, Rb-Sr isotope data, C.A.Goodrich et al., GCA, 1991, 55, p.829; LPSC, 1990, 21, p.425 (abs.). Trace element analysis of bulk and acid-treated samples, A.H.Spitz and W.V.Boynton, GCA, 1991, 55, p.3417. Refractory trace element data, U.Kr
Northwest Africa 773
We purchased this meteorite from Bedouin near Dchira, Western Sahara in 2000. By February 2001 it’s lunar origin was confirmed. Yet the composition was unmatched. It has two distinct lithologies: a green cumulate and black breccia. Dr. Tim Fagan made the first description of this new type of meteorite calling it a cumulate olivine norite with regolith breccia more often abbreviated norite. Interesting spectroscopy research of the south pole of the moon (Atkin Basin) have remarkable similarities with composition of this meteorite.
Bilanga
At least 25kg of meteorites with fresh black fusion crust were collected after a widely witnessed meteorite shower. Pieces are reported to have fallen in the villages of Bilanga-Yanga and Gomponsago. Diogenites are a relatively rare type of meteorite. Macroscopic native copper up to 2mm has been observed in Bilinga.