[meteorite-list] Looking to Buy. Trying to "complete" my type set. THERE IS A NEW CHONDRITE TYPE....

[Shawn Alan]

Hello Richard Listers,

Not sure if you seen the news about Almahata Sitta, but I think this would be up your alley because you collect Type meteorites. Take a look at the new findings from the MAPS journal from OCT-NOV issue.

http://adsabs.harvard.edu/abs/2010M%26PS...45.1657H

Abstract

Among the several hundred, mostly small meteorite fragments, recovered within the Almahata Sitta strewn field, one fragment (MS-CH), weighing 5.68 g, was detected that represents a new type of chondritic meteorite. The detection of short-lived cosmogenic radionuclides clearly indicates that this chondrite fragment results from a fresh meteorite fall consistent with the Almahata Sitta event in October 2008. The fundamental mineralogical characteristics of the Almahata Sitta fragment MS-CH can be summarized as follows: (1) the almost equilibrated olivine has high Fa contents of about 36 mole%. The fragment is of petrologic type 3.8 ± 0.1; (2) the metal abundance of the rock is on the order of 2.5 vol%; (3) the mean chondrule size has been determined to be roughly 450 μm; (4) point-counting and imaging indicate that the matrix abundance is approximately 45 vol%; (5) Cr-spinels have much lower TiO2 concentrations than typical spinels within R chondrites;
 (6) calcium-aluminum-rich inclusions are spinel-rich and severely altered having abundant Na- and/or Cl-rich alteration products. Spinel also contains significant concentrations of Fe and Zn; (7) magnetites and platinum-group element-rich phases (sulfides, tellurides, and arsenides) characteristic of both R and CK chondrites were not found in fragment MS-CH; and (8) the mean oxygen isotope composition of three small fragments of Almahata Sitta MS-CH is δ17O = +4.35‰, δ18O = +4.94‰, and Δ17O = +1.76‰. The oxygen isotopes relate MS-CH to R chondrites. No established chondrite group having all these characteristics exists.



Shawn Alan 
IMCA 1633 
eBaystore 
http://shop.ebay.com/photophlow/m.html 




[meteorite-list] Looking to Buy. Trying to "complete" my type set
Richard Kowalski damoclid at yahoo.com 
Sun Feb 13 16:45:17 EST 2011 

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Hello all, 

Though I've been collecting meteorites on and off, my desires took over a little over two years ago. Since then my primary collecting interests have centered around building a meteorite type set. In the last two years I have nearly completed the task, and am only missing a handful of types to make the collection "complete". 

As such I'd like to put my want list out there and see if anyone might have what I am looking for. 

At the top of my want list are the types; 

C4 
CK6 
EH3 
EL5 
EL7 
R6 

While I haven't quite finished the necessary research on the irons I need, for completeness it appears I am missing these groups: 

IC 
IID 
IIF 
IIG 
IIICD 
IIIE 
IIIF 
IVB (Hoba) 

I'm not looking for museum quality specimens, but instead I am looking for pieces that range from a few grams to a few milligrams, depending on the per gram price, to fill in the remaining "holes" in my collection. 

If you have anything I need, I would really appreciate you contacting me off list with availability and prices. 

THANKS! 

-- 
Richard Kowalski 
Full Moon Photography 
IMCA #1081 



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