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Topic: Mesosiderite

	Mesosiderite - Wikipedia, the free encyclopedia
		The most recent fall of a mesosiderite occurred at Dong Ujimqin Qi in China, on September 7, 1995, where three large pieces with a total mass of 129 kg fell.
		The fall of the Estherville mesosiderite in Iowa, USA, occurred on May 10, 1879.
		The other observed mesosiderite falls occurred in 1842 at Barea (Spain), in 1880 at Veramin (Iran), in 1933 at Dyarrl Island (Papua New Guinea), and at Patwar (India) in 1935.
	en.wikipedia.org /wiki/Mesosiderite (325 words)

	mesosiderite
		The name "mesosiderite" comes from the Greek mesos for "middle" or "half," and sideros for "iron" and reflects the fact that these meteorites are roughly equal mixture of differentiated silicates and iron-nickel.
		The iron-nickel in mesosiderites, on the other hand, looks like the metal in group IIIAB iron meteorites, and shows every sign of having derived from the core of a completely different asteroid than that which spawned the silicates.
		One possible explanation of the origin of mesosiderites is that a collision took place between two differentiated asteroids in which the still-liquid core of one asteroid mixed with the solidified crust of the other.
	www.daviddarling.info /encyclopedia/M/mesosiderite.html (383 words)

	What are Meteorites
		Mesosiderites and Pallasites are the two main groups of the stony-iron meteorites.
		Mesosiderites consist of broken angular fragments of mantle rock and nickel-iron that have been fused together by impacts with another body.
		Pallasites, some of the most attractive meteorites, are believed to have formed at the core-mantle boundary of asteroids and contain crystals of olivine (peridot).
	www.meteorlab.com /METEORLAB2001dev/whatmeteorites.htm (399 words)

	Unusual Meteorite Features (NWA 1827 with Crystal Inclusions) - Meteorites Australia
		Several NWA Mesosiderites have now been found and classified under different numbers but they are mostly thought to belong to the same large heterogeneous Mesosiderite with a Total Known Weight exceeding 22kg.
		NWA Mesosiderites belonging to the 2C subgroup include: NWA 1827, NWA 1879, NWA 1882, NWA 1912, NWA 1951, NWA 1982, NWA 3055 and probably NWA 1645.
		The mineralogy of this Mesosiderite is of a mostly medium-grained Igneous texture with some large mineral clasts of Orthopyroxene and Plagioclase which are commonly surrounded by metal-rich areas.
	www.meteorites.com.au /features/nwa1827.html (221 words)

	abst37-12supplement (Site not responding. Last check: 2007-10-30)
		Although this rock resembles a mesosiderite in its hand-sample aspect and in having Ni-bearing iron metal, it is not a meteorite.
		This inference is based on the lack of a fusion crust, the lack of cosmogenic nuclides, oxygen with terrestrial isotope ratios, and several mineral chemical criteria.
		Mesosiderite imposters like this may be recognized by (1) the presence of Cu metal in hand sample or as microscopic blebs in the low-Ni metal (kamacite), (2) the absence of high-Ni metal (taenite), and (3) the presence of iron carbide (cohenite) enclosing the kamacite.
	www.uark.edu /~meteor/abst37-12supp.html (1098 words)

	NORTHWEST AFRICA 1827 PHOTO
		The general appearance of NWA 1827 was found to be similar to that of a mesosiderite, exhibiting an equilibrated, igneous texture, and consisting primarily of metal and abundant orthopyroxene, along with minor troilite, chromite and merrillite, and rare anorthite.
		However, NWA 1827 was inconsistent with a classification as a mesosiderite for several reasons.
		However, further analysis conducted at the Northern Arizona University (T. Bunch) of a larger area of this heterogeneous mesosiderite revealed sparse eucrite and diogenite inclusions, and has led to the conclusion that NWA 1827 is most similar to a mesosiderite of the 2C subgroup, the second such mesosiderite after RKPA79015.
	www.meteoritestudies.com /protected_NWA1827.HTM (452 words)

	abst36-7
		The paucity of olivine in mesosiderites and the lack of metal-poor or troilite-rich meteorites from the mesosiderite body probably reflect biased sampling.
		Mesosiderites may be olivine-poor because mantle material was preferentially excluded from the metal-rich regions of the reaccreted body.
		Be pair we derive a terrestrial age of 18 ± 1 ka, which seems too recent to be consistent with the original description of the main mass having a heavily wind eroded base, overhung by the upper part of the meteorite.
	www.uark.edu /~meteor/abst36-7.htm (2329 words)

	VACA MUERTA MESOSIDERITE STREWNFIELD
		A field investigation is presented of the strewnfield of the mesosiderite Vaca Muerta, originally found in 1861.
		The care with which the chopped meteorite was stored (the heaps at VM 5 and 6 were placed on burlap) indicates that it was intended to be picked up at a later time.
		Rubin A.E. and Jerde E.A. Diverse eucritic pebbles in the Vaca Muerta mesosiderite.
	www.astro.ku.dk /~holger/meteor/talwas280392.html (7447 words)

	NORTHWEST AFRICA 1961 PHOTO
		The meteorite was classified at the University of Münster, Germany (A. Bischoff) as a mesosiderite, while a 3A subtype was assigned to this meteorite by the Natural History Museum of Bern, Switzerland (B. Hoffmann).
		This mesosiderite has been shocked to stage S2 and is relatively unweathered with a grade of W0/1.
		Further information about the mesosiderite grouping scheme can be found on the Bondoc page.
	www.meteoritestudies.com /protected_NWA1961.HTM (152 words)

	IMPACTIKA: Meteorites (Site not responding. Last check: 2007-10-30)
		But the largest mass was divided between the Museums of Paris, London and Vienna shortly after the fall, and the second largest has since disappeared.
		This meteorite has been classified as a Mesosiderite, a rare type (less than of 0.3% of all known meteorites), a mixture of iron and silicates.
		This very nice small part slice is very thin and shows well the mixture of iron and silicate typical of a mesosiderite.
	www.impactika.com /Meteorities/Esthr3gA.html (109 words)

	Stony Iron / Mesosiderite / NWA 2676
		This is a very unusual mesosiderite in that it has such a high metal content that UCLA originally assumed it to be a silicated iron and only after elemental analysis determined it to actually be a high metal mesosiderite.
		Unlike, most mesosiderites, this one had a very high metal content at one end and a somewhat lower content at the other end.
		There is not a lot of this mesosiderite to go around, so if you are looking to add a really beautiful, high metal mesosiderite to your collection you may want to reserve a specimen sooner than later.
	www.arizonaskiesmeteorites.com /AZ_Skies_Links/NWA_2676 (320 words)


		Mesosiderites probably represent the shattered regolith of an asteroid that has been the target of several asteroid-asteroid collisions.
		Pieces of this regolith can be blasted off the surface of a larger body, and eventually reach the Earth as meteorites, or if large enough, as impacting bolides.
		The sulfur in mesosiderites is primarily in the form of troilite (FeS) - a sulfide mineral.
	www.lpl.arizona.edu /SIC/impact_cratering/Enviropages/atmossulphur/sulphurweb.html (1248 words)

	Dalgaranga mesosiderite meteorite
		A number of small fragments of iron were found in and around a crater 70 feet across and 11 feet deep, in 1923, but only one of 40g was preserved in E.S. Simpson's collection.
		In 1960 a further 207 pieces were collected around the crater and about 1/2 were mesosiderite and the rest shale.
		About 20 pounds was found in the crater and it was all shale.
	www.star-bits.com /dalgaranga.htm (99 words)

	[meteorite-list] Estherville Mesosiderite (Site not responding. Last check: 2007-10-30)
		Most of the mesosiderites I have seen are like Estherville, save that I don't recall any with such nice olivine crystals, where the metallic component is arranged in a substantial web through the rocky matrix, but is irregular in distribution, with somewhat diffuse edges (blobby).
		Maybe they >originated when the differentiated parent body of the mesosiderites was >disrupted and reaccreted.
		What is noticeably > > missing from the mesosiderites is olivine..." > >Well, this is obviously untrue as most mesosiderites have at least >minor amounts of olivine.
	six.pairlist.net /pipermail/meteorite-list/2004-May/161376.html (462 words)

	Meteorite Types: Mesosiderites
		Mesosiderites, one class of stony-iron meteorites, are the most unusual.
		A mixture of metal grains, pyroxene, olivine, and plagioclase, the "mixture" in Mesosiderites is technically known as a breccia, which is a matrix of broken rock fragments cemented by fine-grained material formed from the surface fragments of an asteroid.
		In the MeteoriteKit we include a slice of the Vaca Muerta mesosiderite.
	www.meteoritekit.com /meteorites/mesosiderites.html (89 words)

	Pictures of Mesosiderites; Mesosiderite Photos
		Mesosiderites are thought to have formed through the action of catastrophic impact events mixing the surface of the parental body with the nickel iron core material.
		Interior of a large mesosiderite showing the high metal content as well as large metalic spheroids.
		This is a work in progress so please be sure to check back in future as we add more images.
	www.arizonaskiesmeteorites.com /AZ_Skies_Links/Meteorite_Photos/Stony_Irons/Mesosiderites/index.html (115 words)

	METEORITE SALE
		Like almost always there is a fair amount coming out at one time and I see a lot of customers figuring that there are tons of it but after a couple months it dries up and they are left out.
		A solid (Almost) ball of metal with the normal mesosiderite around it.
		When I cut it there was a weak spot between the ball an deverything else so it broke away.
	www.meteoriteshop.com /sales/r1sale1-50.html (297 words)

	Mesosiderites
		A 5.12 kg single mass was purchased in Erfoud in 2003.
		Wittke, NAU): typical B2 mesosiderite, based on 8 vol.
		Wittke, NAU): mesosiderite with nearly equal portions of metal and silicates; metal composed of mostly continuous aggregates of metal balls (0.2-0.4 mm diameter) that resemble grape clusters and enclose clumps of silicates.
	www4.nau.edu /meteorite/Meteorite/Mesosiderites.html (851 words)

	Michael Farmer Meteorites - Sale Catalog
		This mesosiderite exhibits only minor recrystallization and has a matrix composed predominantly of orthopyroxene, features which are consistent with subgroup 2B.
		In contrast to NWA 1912, other 2B mesosiderites contain melt-rock textures and were historically reclassified into the igneous subgroup 4B.
		I would like to thank David Weir for his assistance in writing the description for this very rare and strange mesosiderite.
	www.meteoriteguy.com /catalog/nwa1912.htm (144 words)

	[meteorite-list] Mesosiderite and Silicated Irons (Site not responding. Last check: 2007-10-30)
		Still, Mount Padbury is a mesosiderite, and Lueders > is classified a silicated iron.
		Hi Anne and List, The mineral compositions in the silicate inclusions in Lueders, a IAB iron, are similar to winonaites, i.e.
		primitive achondritic, whereas silicate fragments in mesosiderites are similar to eucrites, howardites, and diogenites (crustal material of an achondrite parent body).
	six.pairlist.net /pipermail/meteorite-list/2003-June/092356.html (152 words)

	A history of the mesosiderite asteroid. American Scientist - Find Articles (Site not responding. Last check: 2007-10-30)
		Enigmatic meteorites, mixtures of iron and stone, can be understood by unraveling the evolutionary history of their parent asteroid
		Mesosiderites comprise a strange group of about 30 known meteorites that have been recovered from locations on every continent, where they have inspired awe in local residents (except perhaps in Antarctica) and consternation among the scientists who study them.
		The puzzle of the mesosiderites resides in their composition, and their name alludes to this: The roots of the word are the Greek mesos, meaning "middle" (loosely, "half"),...
	www.findarticles.com /p/articles/mi_hb010/is_199701/ai_n5788088 (230 words)

	Alicia Fallocaro Biography
		Bedell, R.L. Reid J.B. (1980) Immiscible ilmenite and sulfide liquids in a garnet clinopyroxenite dike from Salt Lake Crater, Hawaii; EOS vol.
		Delaney, J.S, Bedell, R.L., Klimentidis, R., Nehru, C.E.,, Prinz, M. (1980) Olivine clasts in mesosiderites and howardites: clues to the nature of an achondrite parent body; Proceedings Lunar and Planetray Science Conference 11.
		Prinz, M., Nehru, C.E., Delaney, J.S., Harlow, G.E., and Bedell, R.L. (1980) Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219; Proceedings Lunar Planet Sci.
	www.unr.edu /mines/able/People/bedell/Bedell.htm (883 words)

	METEORITE SALE
		As with tuesdays sale I will start this sale of with ten of the moroccan mesosiderites.
		Most items not marked as sold on this last sale is still available to buy also.
		51h - Mesosiderite - 9 Grams - $44.50
	www.meteoriteshop.com /sales/r1sale51-100.html (154 words)

	Plato Putorano native Irom. Extremely rare on Earth. Structure and composition as Mesosiderite meteorite. (Site not responding. Last check: 2007-10-30)
		Plato Putorano - native Earth iron, mesosiderite prototype
		The first sample of this iron was found in August 1984 during geological research in the South-eastern region of the Putorano
		The oil and gas deposits are discovered - about I billion tons.
	www.rockssearch.com /rsPutorano.html (625 words)

	Meteorites 30.00 - 99.99
		Meteorite / Mesosiderite / Sahara 98088 / End piece 7.24g
		A single meteorite found in September/October 1998 weighing 2.52kg.
		A small end cut of the Sahara 98088, this unusual mesosiderite display thin metal in a abundant silicated matrix.
	www.lunar-meteorites.com /en-us/dept_202.html (144 words)

	Meteorites-R-Us Catalog
		These are mixtures of iron and stony material like type S asteroids.
		This beautiful slice is representative of the newly discovered ^C^ class mesosiderite.
		I believe this is a new type of Mesosiderite from NWA!!
	www.meteorites-r-us.com /category.cfm?cat_id=163 (167 words)

	Michael Farmer Meteorites
		Type: Mesosiderite Fell: September 7, 1995 TKW: ~129 kilos
		This fascinating mesosiderite fell on September 7, 1995 at 13:35 hours Nei Mongol Zizhiqu, Inner Mongolia, China.
		On a cloudless day, people heard a large thundering sound and saw a fl smoke trail.
	www.meteoriteguy.com /catalog/dong-ujimqin-qi.htm (149 words)

	Morenosite
		Vaca Muerta mesosiderite, morenosite, Atacama desert meteorite, Chile...
		An orthorhombic mineral, NiSO4.7H2 O ; may contain appreciable magnesium; apple-green; in secondary incrustations from the oxidation of nickel-bearing sulfides.
		Vaca Muerta mesosiderite, metal inclusion, Atacama desert meteorite, Chile
	www.toprocks.net /MineralList/62/Morenosite.asp (361 words)

	Pallasite, Seymchan, Stony-Iron Meteorites for Sale
		Stony-irons are the rarest of the the three main classes of meteorites, and include the pallasites and mesosiderites.
		Pallasites contain crystals of olivine, which in its purest form is known as the semi-precious gemstone peridot.
		To order send an email to: or telephone (520) 742 3333
	www.aerolite.org /stony-iron-meteorites.htm (253 words)

	eBay.co.uk Shop - ATAXITE: Nuggets: PLATO PUTORANO LIKE MESOSIDERITE METEORITE ENDCUT PIECE (Site not responding. Last check: 2007-10-30)
		eBay.co.uk Shop - ATAXITE: Nuggets: PLATO PUTORANO LIKE MESOSIDERITE METEORITE ENDCUT PIECE
		Travel to the wonderful world of gemstones and minerals with ATAXITE and discover our new goods for jeweller, gem cutter, collectors or just a lover of gems!
		Use of this Web site constitutes acceptance of the eBay User Agreement and Privacy Policy.
	stores.ebay.co.uk /ATAXITE_Nuggets_W0QQfsubZ6 (125 words)

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