This article was accepted into the corpus but its outbound wikilinks were never NER-processed — typical at the deepest BFS hop or when the run's entity cap was reached. No expansion funnel to show.
| Tagish Lake meteorite | |
|---|---|
| Name | Tagish Lake |
| Type | Carbonaceous chondrite |
| Class | C2-ungrouped (similar to CI, CM) |
| Country | Canada |
| Region | British Columbia / Yukon |
| Fall date | 18 January 2000 |
| Strewn field | Tagish Lake area |
| Total recovered | ~10 kg |
Tagish Lake meteorite The Tagish Lake meteorite fell on 18 January 2000 near Tagish Lake, on the border between British Columbia and the Yukon in Canada. Fragments were recovered by residents and scientific teams, prompting studies by institutions including the University of Western Ontario, the Smithsonian Institution, the University of Calgary, the University of Alberta, and the National Research Council (Canada). The meteorite is notable for its primitive carbonaceous chondrite characteristics, exceptionally high volatile content, and abundant organic matter, making it a focal point for research by researchers affiliated with the NASA Johnson Space Center, the Planetary Science Institute, and the Max Planck Institute for Solar System Research.
On 18 January 2000 eyewitnesses in the Tagish Lake region reported a bright fireball and sonic booms; residents in communities such as Carcross and Atlin observed fragments landing on frozen lake ice. Local collectors and members of the Tagish Lake community retrieved fragments within days; these were transferred to institutions including the Royal Ontario Museum, the Canadian Museum of Nature, and the Smithsonian Institution for analysis and preservation. Recovery missions were coordinated with teams from the University of Calgary and the University of Western Ontario, and involvement by the Royal Canadian Mounted Police and provincial authorities ensured chain-of-custody for samples.
Initial classification identified the meteorite as an ungrouped carbonaceous chondrite with affinities to CI chondrite and CM chondrite groups. Laboratory analyses by researchers at NASA Ames Research Center, the Jet Propulsion Laboratory, and the University of Tokyo revealed a matrix rich in phyllosilicates, sulfides, and magnetite, and a bulk composition with elevated volatile and carbon content similar to cometary material studied by the Stardust and Rosetta missions. Isotopic studies conducted at the Massachusetts Institute of Technology, the European Space Agency (ESA), and the University of California, Los Angeles showed anomalous oxygen isotopic ratios that challenged simple classification, supporting its designation as "C2-ungrouped."
Petrographic investigations by teams from the University of New Mexico, the Smithsonian Institution, and the Natural History Museum, London documented a fine-grained matrix hosting chondrules, amoeboid olivine aggregates, and abundant hydrated minerals. Secondary alteration minerals include serpentine, cronstedtite, and tochilinite, with sulfides such as pentlandite and pyrrhotite identified by researchers at the Max Planck Institute for Chemistry and the University of Tokyo. Transmission electron microscopy studies at the California Institute of Technology and the University of Chicago revealed nanoscale organic-mineral associations, while magnetic mineralogy work at the Institute of Geophysics, ETH Zurich constrained aqueous alteration histories.
The Tagish Lake specimens yielded a diverse suite of organic molecules analyzed by laboratories at the Scripps Institution of Oceanography, the University of California, Berkeley, and the NASA Goddard Space Flight Center. Detected compounds include amino acids, polycyclic aromatic hydrocarbons (PAHs), and aliphatic hydrocarbons, with isotopic signatures measured at the California Institute of Technology and the University of Arizona indicating extraterrestrial origins. Studies led by researchers affiliated with the SETI Institute and the Planetary Science Institute investigated racemic amino acid distributions, nitrogen- and hydrogen-isotope ratios, and the presence of acid-soluble macromolecular carbon, informing models of prebiotic chemistry and contributions to early Earth's organic inventory in work connected conceptually to the Murchison meteorite and hypotheses explored by scientists at the European Molecular Biology Laboratory.
Because of its primitive nature and volatile richness, the meteorite has been central to debates about aqueous alteration on parent bodies, volatile delivery to terrestrial planets, and links between asteroids and comets. Isotopic and mineralogical work by teams at the University of Western Ontario, the Smithsonian Institution, and NASA supported connections to outer Solar System materials sampled by the Rosetta and Hayabusa2 missions. The sample has informed models of parent body accretion, as discussed in publications by researchers at the Carnegie Institution for Science, the Lunar and Planetary Institute, and the University of Tokyo, and has been cited in comparative studies with the CI chondrite Ivuna, the CM chondrite Murchison, and samples returned by the Genesis (spacecraft) and Hayabusa programs.
Recovered fragments, totaling roughly 10 kilograms, were distributed among repositories including the Smithsonian Institution, the Royal Ontario Museum, the Royal British Columbia Museum, and academic collections at the University of Calgary and the University of Western Ontario. Curation protocols developed in collaboration with the International Astronomical Union-affiliated curatorial community, NASA curation standards, and the Canadian Space Agency ensured low-contamination handling, cold storage, and allocation for destructive analyses. Long-term preservation strategies have been informed by work at the Natural History Museum, London and by curatorial lessons from the Allende meteorite collection.
The event attracted media attention from outlets including the Canadian Broadcasting Corporation, The Globe and Mail, and international science coverage by Nature and Science. The meteorite inspired exhibits at the Royal Ontario Museum and outreach by the Perimeter Institute for Theoretical Physics and the Canadian Space Agency, and has been referenced in public lectures at the Hayden Planetarium and educational materials used by the Smithsonian National Air and Space Museum. The fall has also been discussed in documentary features and in broader cultural contexts alongside celebrated specimens such as the Murchison meteorite and the Allende meteorite.
Category:Meteorites found in Canada Category:Carbonaceous chondrites