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Tagish Lake

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       On 18 January 2000 at 08:43 local time a huge fireball followed by loud detonations was widely observed over the Yukon Territory and northern British Columbia. The fireball was also detected by satellites in Earth orbit allowing an accurate orbit to be calculated.   The meteor, estimated to have been about 6 meters  in diameter approached at ~16 kilometers per second and exploded at an altitude of 25 km with an energy equivalent to 5 kilotons of TNT.  An individual, Jim Brook, recovered several dozen meteorites totaling ~1 kg on the ice of Taku Arm, Tagish Lake, on January 25 and 26.    Scientists were immediately intrigued by this unique carbonaceous chondrite.  However, instead of mounting an immediate collection campaign the location was kept secret and institutional collection was delayed for months until late April.  As a result about 500 additional specimens were located on the ice of Tagish Lake, but only about 200 were retrieved as many had melted down into the ice making them fall apart and their collection time consuming.  The total mass collected was between 5 and 10 kg most of which is in permanent institutional storage.  Very little of this material is available and what is available is in very small fragments.

      Based on mineralogy, isotopic compositions, and bulk chemical compositions, Tagish Lake appears to be intermediate between CM and CI chondrites.   It has significantly less amino acids than expected and it may be a very primitive carbonaceous chondrite, class C2 ungr.   Check out David Weir's excellent page on Tagish lake.

     It is hard to take good photos of tiny black objects.  The pieces look much nicer in person.  They are all in membrane boxes and the light flares you see in the photos are from the membranes.   

tagishLake80-9a.JPG (53908 bytes)  $SOLD
 Weight 80.9 milligrams.

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tagish73-2a.JPG (51720 bytes)  $SOLD
 Weight 73.2 milligrams.

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tagish68-9a.JPG (39205 bytes)  $68.75
 Weight 68.9 milligrams.

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tagishLake62-0a.JPG (55679 bytes)  $62.00
 Weight 62.0 milligrams.

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tagishLake55-4a.JPG (50604 bytes)  $55.00
 Weight 55.4 milligrams.

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tagishLake53-8b.JPG (48330 bytes)  $53.75
 Weight 53.8 milligrams.

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tagishLake39-8b.JPG (47220 bytes)  $39.75
 Weight 39.8 milligrams.

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tagishLake33-4b.JPG (45209 bytes)  $SOLD
 Weight 33.4 milligrams.

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tagishLake27-1a.JPG (47073 bytes)  $27.00
 Weight 27.1 milligrams.  

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tagishLake25-0a.JPG (47765 bytes)  $25.00
 Weight 25.0 milligrams.   

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tagishLake19-9a.JPG (43588 bytes)  $19.75
 Weight 19.9 milligrams.   

    

 

tagishLake15-3a.JPG (54024 bytes)  $SOLD
 Weight 15.3 milligrams.   

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tagishLake14-3a.JPG (48091 bytes)  $14.25
 Weight 14.3 milligrams.   

   

 

tagishLake11-8b.JPG (45351 bytes)  $11.75
 Weight 11.8 milligrams.   

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tagishLake9-6b.JPG (49424 bytes)  $10.00
 Weight 9.6 milligrams.   

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tagishLake4-5a.JPG (43986 bytes)  $10.00
 Weight 4.5 milligrams.