Description
Provenance : Dan Connelly > … > Eric Twelker > me
Those specimens were collected on the ground around the lake in June and July of 2000 by Dan Connelly (a Canadian man). He collected a broken stone and all the little fragments on a beach. The team of Jim Brook knew that stone but they decided to left it there as they prefered to get stones and fragments covered by ice.
Tagish Lake
Canada
Fell january 18, 2000
C2 ungrouped carbonaceous chondrite
Total mass : about 10 kg
Specimens in collection > 6.3 g
The Tagish Lake C2 (ungrouped) carbonaceous chondrite fall of January 18, 2000, delivered about 10 kg of one of the most primitive and physically weak meteorites yet studied. In this
paper, we report the detailed circumstances of the fall and the recovery of all documented Tagish Lake fragments from a strewnfield at least 16 km long and 3 to 4 km wide. Nearly 1 kg of “pristine” meteorites were collected one week after the fall before new snow covered the strewnfield; the majority of the recovered mass was collected during the spring melt. Ground eyewitnesses and a variety of instrument-recorded observations of the Tagish Lake fireball provide a refined estimate of the fireball trajectory. From its calculated orbit and its similarity to
the remotely sensed properties of the D- and P-class asteroids, the Tagish Lake carbonaceous chondrite apparently represents these outer belt asteroids. The cosmogenic nuclide results and modeled production indicate a prefall radius of 2.1–2.4 m (corresponding to 60–90 tons) consistent with the observed fireball energy release.
More about Tagish Lake : Tarda and Tagish Lake: Samples from the same outer Solar System asteroid and implications for D- and P-type asteroids
