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NWA 1794   contributed by James Tobin   MetBul Link


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Copyright (c) James Tobin.
164.43 grams. Approximately 6 cm across the cut face.   LL5

TKW 398 grams. Fall not observed. Purchased October 2002 in Safsaf.

James writes:
NWA 1794 is a really interesting meteorite. It has a fresh fusion crust with regmaglypts and the crust is quite smooth and very black. The Met Bulletin Database has nothing in the way of comments on this meteorite so I will note some observations.

It is a very cool breccia with several different parent rocks contributing clasts. As an LL there is little visible metal and almost all visible metal is in tiny pinprick size specks. Both of the pictures here do show the single larger metal grain. However, some of the clasts are completely free of any visible metal. Though all the metal is tiny it is easy to see that it still varies in size and density of specks from clast type to clast type.

Maybe the most interesting feature of this meteorite is the abundance of troilite. I have never seen another meteorite with as much of this bronze colored mineral. In the detail picture that cover about 30% of the area of the cut face there are numerous troilite inclusions.


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James Tobin
 3/25/2015 10:18:40 AM
It is possible that it is paired John, the Met Bulletin shows 398 grams my information says that amount became 14 kg by the time the finders were initially done. It is possible now as back then for pieces to take various routes to various dealers and get classified repeatedly.
John Divelbiss
 3/25/2015 6:36:19 AM
I meant NWA 1685 a LL4 or 5 from Dean Bessey, NOT the1696(howardite) number
John Divelbiss
 3/25/2015 6:32:40 AM
Not sure, is this NWA # a pairing to the BL group which is represented by NWA 1695 ? looks like it to me but maybe not
graham
 3/25/2015 6:27:44 AM
Interesting sample...I wonder if there is a meteorite that is totally Troilite...or close...wonder if that is possible?
Michael Hofmann
 3/25/2015 12:36:37 AM
Very cool !
 

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