| Titre | Popigai, Siberia - well preserved giant impact structure, national treasury, and world's geological heritage |
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| Auteur | Deutsch, A; Masaitis, V L; Langenhorst, F; Grieve, R A F |
| Source | Episodes vol. 23, no. 1, 2000 p. 3-11 |
| Liens | Online - En ligne
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| Image |  |
| Année | 2000 |
| Séries alt. | Commission géologique du Canada, Contributions aux publications extérieures 2000071 |
| Document | publication en série |
| Lang. | anglais |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Région | Popigai; Siberia |
| Lat/Long OENS | 111.0000 111.5000 71.7500 71.5000 |
| Sujets | cratères météoriques; météorites; Eocene; prospection minière; géologie extraterrestre; géologie structurale; géologie régional |
| Illustrations | cartes de localisation; cartes géologiques généralisées; photographies aériennes; tableaux; photographies; graphiques |
| Programme | IPEX 97 |
| Diffusé | 2000 01 01 |
| Résumé | (disponible en anglais seulement)
The about 35-Ma old Popigai impact structure is located on the northern edge of the Anbar shield in subpolar Siberia. Among the terrestrial “impact ring
basins”, the 100 km diameter Popigai represents the best preserved example with excellent outcrops. In addition, a large number of drill holes and geophysical surveys helped to constrain the sub-surface nature of the crater, making Popigai a
three-dimensional model for similar impact structures on other terrestrial planetary bodies. Moreover, this crater is the type locality for impact diamonds surpassing there in their total mass that at all other known diamond deposits together; alone
this fact makes Popigai a national treasury. The structure which is most probably linked to ejecta horizons occurring in marine sequences of Late Eocene age, has been designated by UNESCO authorities as part of the world's geological heritage. Due to
economic reasons, exploration work in this quite remotely area has ceased more than a decade ago, making new field studies in this crater virtually impossible. We outline the basic characteristics of this world-class site for impact research, the
history of discovery and mineral exploration, and report on IPEX 1997, the first International scientific Popigai Expedition. |
| GEOSCAN ID | 211511 |
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