Re: [meteorite-list] R: help me in understand analysis

[Adam Hupe via Meteorite-list]

A lot of the garbage being sold as lunar meteorites by so-called 
reputable dealers will not even pass the fizz test.


http://geology.com/minerals/acid-test.shtml

Collectors are being fleeced out of thousands of dollars by terrestrial 
limestone breccias, some of which can be found in the Atlas Mountains 
near an impact structure. I would avoid or ask for a refund on any 
material that fizzes on a cut surface! I remember seeing the same 
crustless, caliche-rich material offered up at the Tucson Gem and 
Mineral show several years ago for $50.00/gram. Now it is being offered 
on eBay and other venues due to a somewhat similar appearance to genuine 
Lunar meteorites. I do not know if refunds were given to those who 
purchase this terrestrial material in the past or not.


This is but one example of why all stones suspected as being planetary 
should be formally tested and classified.


If in doubt, throw it out or demand a refund.

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Re: [meteorite-list] R: help me in understand analysis

[Carl Esparza via Meteorite-list]

Francesco, Just found another reference to Lunar rock 12039 by Bunch (not a 
meteorite) and I stand corrected.  It has a bulk SiO2 of 47.3 % and also 
Calcalong Creeks bulk chemestry of SiO2 is actually 47.18. So, actually, Well 
within the Lunar range. I'd get it tested. see link below

https://www.researchgate.net/publication/23878123_Mineralogy_petrology_and_chemistry_of_lunar_rock_12039
Carl
--
--
Love & Life

 Carl Esparza via Meteorite-list  
wrote: 
> Francesco, This puts the Fe/Mn ratio at 74.84. This is indeed within the 
> Lunar range of the most famous lunar meteorite "Calcalong Creek". I possess 
> the results of the actual study and the range based on various samples ranges 
> from 67.3 to 72 so, that does not rule it out as being Lunar. The high SiO2 
> makes it doubtful but, Lunars require extensive research. I'd have it tested 
> by a lab to be sure. 
Carl
--
Love & Life

 Francesco Moser  wrote: 
> I forget Mn, sorry!
> MnO   0.13%
> 
> 
> Thanks
> 
> xx
> Francesco
> 
> 
> -Messaggio originale-
> Da: cdtuc...@cox.net [mailto:cdtuc...@cox.net] 
> Inviato: venerdì 6 ottobre 2017 15:50
> A: Francesco Moser 
> Cc: Francesco Moser via Meteorite-list 
> Oggetto: Re: [meteorite-list] help me in understand analysis
> 
> I don't see the Mn percent. That is needed to get an Fe/Mn ratio. 
> Carl
> --
> Love & Life
> 
>  Francesco Moser via Meteorite-list  
> wrote: 
> > Hello!
> a man have send me some pictures of a dozen stones and asked me wich types of 
> meteorites could be.
> I answered that for me those materials are terrestrial.
> But he tell me that for sure the stones are lunar meteorites :) He has send 
> me this analysis for proving the lunar origin of the stones.
> I'm not able to understand this data, please someone could take a look and 
> tell me if this material could be terrestrial or extra-terrestrial.
> No other analysis was done on the stones. I guess that without an oxigen 
> isotopes abundance ratio is impossible to identify a lunar rock, isn't? 
> 
> Method LF200
> 
> SiO2  47.45%
> Al2O3 19.42%
> Fe2O3 9.73%
> MgO   10.16%
> CaO   8.95%
> Na2O  1.75%
> K2O   0.79%
> TiO2  0.29%
> P2O5  0.08%
> Cr2O3 0.01%
> Ba110ppm
> Ni121ppm
> Sc7ppm
> 
> I Have also a detailed list of trace elements.
> 
> This man tell me that the presence of K2O and P2O5 confirm the 
> extra-terrestrial origin of the rocks.
> 
> Thanks a lot in advance!
> 
> xx
> Francesco
> 
> 
> 
> 
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[meteorite-list] Meteorite Picture of the Day

[Paul Swartz via Meteorite-list]

Today's Meteorite Picture of the Day: Guanaco

Contributed by: Bernd Pauli

http://www.tucsonmeteorites.com/mpodmain.asp?DD=10/08/2017
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