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MISSING: 9.04 kilogram Sikhote-Alin shrapnel individual   More Info


 
Carancas   contributed by Roberto Vargas, IMCA 5746   MetBul Link


Roll Overs:     #1   #2   #3   #4   #5   #6    


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View all entries for   Meteorite (4)   Contributor (37)


9.8 grams.   H4-5

TKW 342 grams (incorrect but that's what the MetBul says). Observed fall 15 September 2007 in Carancas, Chucuito, Puno, Peru.


        Wired


Roberto writes:
Carancas is cool for so many reasons. I especially like it because the fall left a crater and people in the area reportedly got sick from the fumes of the impact.

I also recently learned a new term because of this little fragment - Slickenside. According to Oxford Dictionary, slickenside is a polished and striated rock surface that results from friction along a fault or bedding plane.

I've seen some debate whether pieces of Carancas have fusion crust or slickensides. I'm curious to hear what MPOD readers think about this piece. Is it crusted, slickennsided or both?
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Photo 1

Photo 2

Photo 3

Photo 4

Photo 5

Photo 6

Found at the arrow (green or red) on the map below

 


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Gregor Hoeher
 3/31/2020 3:19:37 PM
Very nice, bigger piece. It has the typical appearance of the Carancas meteorite. I think: dark shock veins where it was torn - no fusion crust (even if it looks similar). Pieces in the low gram range with a surrounding fusion crust should have separated during an earlier fragmentation and would not have landed near the crater (where the meteorite pieces were found).
John Divelbiss
 3/31/2020 2:54:29 PM
a vote for crust (w/brownish coloring) on at least the right half of the specimen.
Bernd Pauli
 3/31/2020 12:04:21 PM
As for the incorrect 342 grams that the Met.Bull. gives, here's what I found in this scientific article: TANCREDI G. et al. (2009) A meteorite crater on Earth formed on September 15, 2007: The Carancas hypervelocity impact (MAPS 44-12, 2009, 1967-1984): The mass of the impactor was in the range 0.3 to 3 ton, and the diameter was 0.6 to 1.1 m (p. 1983).
Bernd Pauli
 3/31/2020 9:09:11 AM
Larry, I am with you: a thin secondary crust covering the slickensides (photos 1, 3, and 6)!
Larry Atkins
 3/31/2020 7:59:09 AM
That's a great looking piece! Could it be a secondary,light crust on the slickensides?
Luca Fenocchio
 3/31/2020 5:32:02 AM
Campione stupendo
Graham Ensor
 3/31/2020 4:04:56 AM
I think slickensides...but not fusion crust. I have a couple similar that show quite clearly that the black melt drops down from the surface into the matrix. however I have also qustioned if this is true slickenside or cleaving along shock veins abundant in Carancas...or is that the same thing?. I suspect not and would be happy to hear if anyone else has views on this?
 

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