[meteorite-list] The Eagle Has Landed, "Oued Bourdim" New Eagle Station Pallasite!
From: Ruben Garcia <rubengarcia85382_at_meteoritecentral.com>
Date: Sun, 11 Jan 2015 13:56:37 -0700
Thank you to everyone that purchased specimens of my NEW Eagle Station
Virtually all the larger specimens are sold - but, I just posted
photos of some very nice smaller specimens. Many are priced at around
the $100 range and some even less.
Worth a look even if you're not in the mood to buy!
BTW- I'll be selling out of Geoff Notkin's room this year so please
stop by and take a look at these rare pallasites in person.
On Thu, Jan 8, 2015 at 1:04 AM, Ruben Garcia <rubengarcia85382 at gmail.com> wrote:
> Hello meteorite/pallasite enthusiasts,
> I am proud to introduce Oued Bourdim (provisional name) It's a New Eagle
> Station Pallasite and it's just been submitted for Nom-Com approval.
> Wikipedia says this about Eagle Station pallasites, "The Eagle Station
> grouplet (abbreviated PES - Pallasite Eagle Station) is a set of pallasite
> meteorite specimens that don't fit into any of the defined pallasite groups.
> In meteorite classification five meteorites have to be found, so they can be
> defined as their own group. Currently only four Eagle Station type
> meteorites have been found."
> Thanks to Dr Laurence Garvie (ASU) Dr John Wasson (UCLA) Dr H. Chennaoui
> Aoudjehane and Dr Karen Ziegler (UNM) this was true until today!
> Oued Bourdim (provisional name) Is the fifth Eagle Station pallasite to be
> discovered and was just submitted for classification approval. Once this
> meteorite is classified Eagle Station will become a proper pallasite group!
> I purchased all there was - a total of nearly 400 grams - from Moroccan
> dealers over a three year period, in the form of small individuals. Already
> much of it has disappeared into Museum/University and private collections. I
> have only 140 grams of nice specimens for sale here. These individuals are
> small and range from about .250 grams to 9 grams, but just because these
> meteorites are small doesn't mean they're not awesome!
> This meteorite has everything going for it, beauty, rarity, and low TKW not
> to mention it has the distinction of being Eagle Station # 5 - finally
> making PES a proper pallasite group.
> Have you ever tried to purchase ANY Eagle Station Pallasite type? If so, you
> already know it's not easy to do - there is none on the private market for
> sale. It won't be long before this is all gone too!
> Institution trades are always welcome, but hurry while there is still a
> selection to choose from.
> Please check below for available specimens and prices.
> Weathering: medium
> Fa: 21.2 ?0.2
> Classifier: L. Garvie, J. Wasson, K. Ziegler, H. Chennaoui Aoudjehane
> Type spec mass: 116.7
> Type spec loc: ASU
> Main mass: ASU
> Finder: Brahim Oubadi
> Writeup history:
> (H. Chennaoui Aoudjehane, FSAC): During November 2007, Brahim Oubadi from
> Bouanane (south east Morocco, near Boudnib) was searching for meteorites
> near Oued Bourdim. He found many small pieces of a heavy rock (for its size)
> that looked different from the surrounding materials around 32? 00' 21.1"N
> and 3? 14' 15.6" W. Over the next few years Mr. Oubadi found approximately
> 400 g. He sold the stones to a meteorite dealer in Boudnib, and they were
> subsequently sold at the Tucson Gem and Mineral show where they were
> nicknamed "Boudnib". The meteorites were found on an old
> desert-varnish-covered wadi called Oued Bourdim.
> Writeup physical:
> Many small stones totaling 393 g: the largest are 48.9 g and 68.9 g, whereas
> the majority is <10 g in mass. Exterior of the stones is dark colored and
> the olivines are sand blasted with a waxy luster. Fusion crust largely
> absent, though there are a few remaining patches on the metal. Medium to low
> Writeup petrog:
> (L. Garvie, ASU). A 3 x 2 cm sawn surface of the 48.9 g stone shows 30
> areal% metal. Olivine grains highly fractured, rounded and <1 cm across.
> Swathing kamacite to 1-mm thick and discontinuous. There are a few areas of
> swathing schreibersite to 0.5 mm thick. Ropey schreibersite also present
> within the swathing kamacite. Troilite rare, occurring as spheres to 1 mm in
> the olivine. The bulk of the metal has a martensite decomposition structure
> (Novotny et al., 1982), composed of Widmanst?tten alpha platelets (typically
> <100 um long) in fine plessite matrix: schreibersite 10 to 50 um is common.
> The platelets are surrounded by taenite rims. Two chromite grains present.
> Excluding the 48.9 g stone, six additional stones were sectioned, polished,
> and etched - all showed metal with the martensite decomposition structure.
> Terrestrial Fe oxides locally replacing swathing kamacite and troilite.
> Reference: Novotny, P.M., Goldstein, J.I., and Williams, D.B. (1982)
> Analytical electron microscope study of eight ataxites. Geochimica et
> Cosmochimica Acta, 46, 2461-2469.
> Writeup geochem:
> (J. Wasson, UCLA): Metal composition by INAA (mean of two analyses) Ni 170.3
> mg/g; Co 9.1 mg/g, Ga 8.1 ug/g, As 12.8 ug/g, Ir 5.98 ug/g, W 0.36 ug/g, Pt
> 17 ug/g, and Au 1.34 ug/g. (L. Garvie, ASU): EMPA of eight separate olivine
> grains give Fa21.2?0.2, FeO/MnO=99.9?9.0. (K. Ziegler, UNM): Analyses of 5
> acid-washed olivine subsamples by laser fluorination dual inlet mass
> spectrometry gave, respectively, d17O -6.02, -5.98, -5.82, -6.04, -6.48;
> d18O -2.17, -2.19, -1.85, -2.15, -2.98; D17O -4.88, -4.83, -4.85, -4.91,
> -4.91 per mil (reference TFL slope = 0.528, values are linearized).
> Specimens: ASU 116.7 g, Ruben Garcia 158.8 g, and Bob Cuchiara 68.9 g.
> Rock On!
> Ruben Garcia
-- Rock On! Ruben Garcia http://www.MrMeteorite.comReceived on Sun 11 Jan 2015 03:56:37 PM PST