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Article: Discovery of probable Tunguska cosmic body material: Anomalies of platinum group elements and rare-earth elements in peat near the Explosion Site (1908)

TitleDiscovery of probable Tunguska cosmic body material: Anomalies of platinum group elements and rare-earth elements in peat near the Explosion Site (1908)
Authors
KeywordsElement anomalies
ICP-MS
PGE
REE
Tunguska explosion
Issue Date2000
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/pss
Citation
Planetary And Space Science, 2000, v. 48 n. 15, p. 1447-1455 How to Cite?
AbstractTen Sphagnum fuscum peat samples collected from different depths of a core including the layer affected by the 1908 Tunguska explosion in the Tunguska area of Central Siberia, Russia, were analyzed by ICP-MS to determine the concentrations of Pd, Rh, Ru, Co, REE, Y, Sr, and Sc. The analytical results indicate that the Pd and Rh concentrations in the event- and lower layers were 14.0-19.9, and 1.23-1.56 ppb, respectively, about 3-9 times and 3 times higher than the background values in the normal layers. In addition, the patterns of CI-chondrite-normalized REE in the event layers were much flatter than in the normal layers, and differed from those in the nearby traps. Hence, it can be inferred from the characteristics of the elemental geochemistry that the explosion was probably associated with extraterrestrial material, and which, most probably, was a small comet core the dust fraction of which was chemically similar to carbonaceous chondrites (CI). In terms of the Pd and REE excess fluxes in the explosion area, it can be estimated that the celestial body that exploded over Tunguska in 1908 weighed more than 106 t, corresponding to a radius of > 60 m. If the celestial body was a comet, then its total mass was more than 2 × 107 t, and it had > 160 m radius, and released an energy of > 107 t TNT. © 2000 Elsevier Science Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73068
ISSN
2015 Impact Factor: 1.942
2015 SCImago Journal Rankings: 1.072
References

 

DC FieldValueLanguage
dc.contributor.authorHou, QLen_HK
dc.contributor.authorKolesnikov, EMen_HK
dc.contributor.authorXie, LWen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorKolesnikova, NVen_HK
dc.date.accessioned2010-09-06T06:47:45Z-
dc.date.available2010-09-06T06:47:45Z-
dc.date.issued2000en_HK
dc.identifier.citationPlanetary And Space Science, 2000, v. 48 n. 15, p. 1447-1455en_HK
dc.identifier.issn0032-0633en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73068-
dc.description.abstractTen Sphagnum fuscum peat samples collected from different depths of a core including the layer affected by the 1908 Tunguska explosion in the Tunguska area of Central Siberia, Russia, were analyzed by ICP-MS to determine the concentrations of Pd, Rh, Ru, Co, REE, Y, Sr, and Sc. The analytical results indicate that the Pd and Rh concentrations in the event- and lower layers were 14.0-19.9, and 1.23-1.56 ppb, respectively, about 3-9 times and 3 times higher than the background values in the normal layers. In addition, the patterns of CI-chondrite-normalized REE in the event layers were much flatter than in the normal layers, and differed from those in the nearby traps. Hence, it can be inferred from the characteristics of the elemental geochemistry that the explosion was probably associated with extraterrestrial material, and which, most probably, was a small comet core the dust fraction of which was chemically similar to carbonaceous chondrites (CI). In terms of the Pd and REE excess fluxes in the explosion area, it can be estimated that the celestial body that exploded over Tunguska in 1908 weighed more than 106 t, corresponding to a radius of > 60 m. If the celestial body was a comet, then its total mass was more than 2 × 107 t, and it had > 160 m radius, and released an energy of > 107 t TNT. © 2000 Elsevier Science Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/pssen_HK
dc.relation.ispartofPlanetary and Space Scienceen_HK
dc.subjectElement anomaliesen_HK
dc.subjectICP-MSen_HK
dc.subjectPGEen_HK
dc.subjectREEen_HK
dc.subjectTunguska explosionen_HK
dc.titleDiscovery of probable Tunguska cosmic body material: Anomalies of platinum group elements and rare-earth elements in peat near the Explosion Site (1908)en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0032-0633&volume=48&spage=1447&epage=1455&date=2000&atitle=Discovery+of+probable+Tunguska+cosmic+body+material:+anomalies+of+platinum+group+elements+and+rare-earth+elements+in+peat+near+the+Explosion+Site+(1908)en_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0000260785en_HK
dc.identifier.hkuros57995en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0000260785&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume48en_HK
dc.identifier.issue15en_HK
dc.identifier.spage1447en_HK
dc.identifier.epage1455en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHou, QL=7005883718en_HK
dc.identifier.scopusauthoridKolesnikov, EM=7005694781en_HK
dc.identifier.scopusauthoridXie, LW=8523115400en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridKolesnikova, NV=7005912139en_HK

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