[meteorite-list] Xining writeup (hammer?)

From: Galactic Stone & Ironworks <*meteoritemike_at_meteoritecentral.com*> Date: Fri, 24 May 2013 10:19:15 -0400 Message-ID: <CAKBPJW_vcWizy_724usdLAU-JaZkkggAzrWdNjS3FyWiO5Pneg_at_mail.gmail.com> · meteoritemike_at_meteoritecentral.com

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On 5/24/13, Prof. Zelimir Gabelica Universit? de Haute Alsace ENSCMu,
<zelimir.gabelica at uha.fr> wrote:
> Martin, thanks very much for the Xining classification info.
>
> I had acquired in early Spring 2012 a 21.5 g ~30% crusted fragment
> from a Chinese source, who also provided some data regarding the fall
> and its recovery, that I used to build up a provisional collection
> writeup until the meteorite is officially classified.
>
> I just modified this initial writeup using the new Metbull data. Here
> it is (for what it is worth) for those who like to associate their
> collection meteorites with some historical and scientific data.
> Enjoy or delete.
> -----------------------------
> XINING History and scientific significance.
>
> On February 11, 2012, a large meteor blazed across the sky over the
> mountains of rural China. This meteorite exploded in flight and the
> fragments showered across the remote mountainous region of Huangzhong
> County in Qinghai Province.
> The fireball was witnessed by local villagers who lived near the area
> and pieces of the meteorite were seen to fall aross a wide area that
> includes a snow-covered mountain top area at an altitude over 8000 feet.
> Shortly thereafter villagers recovered about 10 stones within the
> Huangzhong county, roughly centered around Xining city of Qinghai
> Province. The strewnfield (ellipse of 20-30 km in length and 4-5 km in
> width oriented NNE) is in a mountainous region, at an average altitude
> of over 2500 m. The fall includes the villages of Baina, Small Sigou,
> Yehong, Heergai, and Baiya.
> The total weight of the fall is more than 100 kg. The largest
> meteorite landed on a mountain slope, weighing 17.3 kg and the second
> largest stone of about 12.5 kg was found on a mountain top of
> Xiaosigou village. A third stone weighing 7.5 kg landed in Baiya
> village, created a small crater and shattered into many pieces. A
> fourth stone weighing 5 kg also broke when it landed in a Muslim
> villager's yard in Herguy village. A fifth stone weighing about 2.5 kg
> landed on a concrete road creating a small crater in Yehong village,
> and broke into many pieces.
> Many pieces and fragments, among which the two lergest meteorites were
> bought from the villagers by "meteorite lovers".
> Miao Buikui and Liu Xijun (Guilin University of Technology-GUT) and
> other researchers from the Beijing Planetarium, who heard the news of
> the fall and visited the fall site, recovered several meteorite
> samples for study and classification.
> Early recovered pieces of the fall show pristine black velvety fusion
> crust up to 1 mm thick and none of them showed signs of rusting. Later
> recovered specimens started to oxidize in the snow.
> Most stones have a similar appearance with a blocky shape and not well
> rounded corners. Where orientation is present, it is poorly developed.
> The broken exposed matrix is primarily white or virgin grey with tiny
> flecks of metal or metal-troilite nodules with (Fe-Ni) metal and
> troilite reaching 20.9 wt.%.
> This meteorite first appeared to be an L chondrite, possibly L5 or L6
> with noticeable shock veins, slickensides and troilite inclusions. The
> final
> classification argued for a L5 type (Metbull, May 23, 2013).
>
> -----------------------------
>
> I'd also appreciate to be informed in case someone notices something
> wrong or incomplete in this just built writeup.
> Thank you!
>
> Best wishes,
>
> Zelimir
> --
> Prof. Zelimir Gabelica
> Universit? de Haute Alsace
> ENSCMu, Lab. LPI-GSEC,
> 3, Rue A. Werner,
> F-68093 Mulhouse Cedex, France
> Tel: +33 (0)3 89 33 68 94
>
>
> Michael Farmer <mike at meteoriteguy.com> a ?crit :
>
>> About time:)
>> I have some killer fragments available.
>>
>> Michael Farmer
>>
>> Sent from my iPad
>>
>> On May 23, 2013, at 9:59 PM, "karmaka"
>> <karmaka-meteorites at t-online.de> wrote:
>>
>>> Dear list members,
>>>
>>> XINING is OFFICIAL in the MetBull now:
>>>
>>> http://www.lpi.usra.edu/meteor/metbull.php?code=57470
>>>
>>> Martin
>>>
>>> Von: Michael Farmer <mike at meteoriteguy.com>
>>> An: Robert Beauford <robertbeauford at rocketmail.com>
>>> Cc: "meteorite-list at meteoritecentral.com"
>>> <meteorite-list at meteoritecentral.com>
>>> Betreff: Re: [meteorite-list] Feb 11, 2012, Qinhai province, Fall
>>> Datum: Thu, 23 May 2013 01:04:31 +0200
>>>
>>> Plenty was found, but I have no idea why the Chinese have refused
>>> to publish it.
>>> I have a couple kilos of fragments if you want some.
>>> Great meteorite, at least 100 kilos recovered.
>>>
>>> Michael Farmer
>>>
>>> Sent from my iPad
>>>
>>> On May 22, 2013, at 6:02 PM, Robert Beauford
>>> <robertbeauford at rocketmail.com> wrote:
>>>
>>>> The early reports on the Feb 11, 2012, fall from Qinghai province
>>>> seemed to indicate that it should lead to an epic recovery, but I
>>>> have not heard of a subsequent name, classification, or any large
>>>> number of finds... was I just not paying attention at the right
>>>> moment (entirely possible), or did nobody do any hunting in
>>>> earnest after the snow melted in the spring?
>>>> Thanks, in advance, for any thoughts.
>>>> -Robert
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