1 Alvarez L W,Alvarez W,Asaro F,et al.Extraterrestrial cause for the Cretaceous-Tertiary extinction:Experimental results and theoretical interpretation.Science,1980,208(4448):1095~1108. 2 马配学,柴之芳,毛雪瑛,等.地外撞击作用和地球灾变环境.地质论评,1995,41(1):20~27. 3 Zoller W H,Parrington J R,Phelan Zkotra J M.Iridium enrichment in airborne particles from Kilauea Volcano.Science,1983,222:1118~1121. 4 Sutherland F L.Volcanism around K/T boundary time—its role in an impact scenario for the K/T extinction events.Earth-Science Reviews,1994,36:1~26. 5 Ganagathy R.A major meteorite impact on the earth 65 million years ago:evidence from the Cretaceous-Tertiary boundary clay.Science,1980,209:921~923. 6 Kyte F T,Chou Z,Wasson J T.Siderophile-enriched sediments from the Cretaceoustertiary boundary. Nature,1980,288:651~656. 7 Alvarez W,Alvarez L W,Asaro F,et al.Current status of the impact theory for the terminal Cretaceous extinction. Geol Soc Am Spec Pap,1982,190:305~315. 8 Smit J.Extinction and evolution of planktonic foraminifera after a major impact at the Cretaceous/Teritary boundary. Geol Soc Am Spec Pap,1982,190:329~315. 9 Kastner M,Alvarez W.The Cretaceous-Tertiary boundary clay at Steven Klint,Denmark,and DSDP Hole 465A.Science,1984,226:137~143. 10 Kyte F T,Smit J,Wasson J T.Siderophile interelement variations in the Cretaceous-Tertiary boundary sediments from Caravaca,Spain.Earth Planet Sci Lett, 1985,73:183~195. 11 Brooks R R,Reeves R D,Yang X H,et al.Elemental anomalies at the K/T boundary,Woodside Creek,New Zealand.Science,1984,226:539~542. 12 Mao X Y,Chai Z F,Ma J G.Ir/Au ratio indicator of origin of geological event.Meteoritics,1989,24:289. 13 Strong C P,Brooks R R,Wilson S M,et al.A new Cretaceous-Tertiary boundary site at Flaxbourne River,New Zealand:biostrati-graphy and geochemistry. Geochim Cosmochim Acta, 1987, 51:2769~2777. 14 Tredoux M,De Wit M J,Lindsay N M,et al.Chemostratigraphy across the Cretaceous-Tertiary boundary and a critical assessment of the Iridium anomaly.J Geology,1989,97:585~605. 15 Evans N J,Gregoire D C,Grieve R A F,et al.Use of platinumgroup elements for impactor identification: Terrestrial impact craters and Cretaceous-Tertiary boundary. Geochim Cosmochim Acta,1993,57:3337~3748. 16 Zhifang Chai,Ping Kong,Xueying Mao,et al.Chemical species of Iridium and other trace elements at K-T boundary clay layer,Stevns Klint,Denmark,and its implication.Science in China(Series B),1991,34(12):1492-1499. 17 孔屏,柴之芳.白垩—第三纪界线样品异常铱的赋存状态及其意义.地质科学,1993,28(1):87~91. 18 柴之芳,孔屏,毛雪瑛,等.丹麦Stevns Klint K-T界线粘土层中铱和其它微量元素的赋存状态和启示.中国科学(B辑),1991,(3):307-313. 19 Evans N J,Gregoire D C,Grieve R A F,et al.The Cretaceous-Tertiary fireball layer and coal seam:Platinum-group element content and mineralogy of size fractions.Meteoritics,1994,29(2):223~235. 20 Schmitz B.Metal precipitation in the Cretaceous-Tertiary boundary clay at Stevns Klint,Denmark.Geochim Cosmochim Acta,1985,49:2361-2370. 21 Schmitz B.Origin of microlayering in worldwide distributed Ir-rich marine Cretaceous/Tertiary boundary clays. Geology, 1988, 16:1068~1072. 22 Montanari A,Hay R L,Alvarez W,et al.Spheroids at the K/T boundary are altered impact droplets of basaltic composition.Geology,1983,17:338-671. 23 Robin E,Froget L,Jehanno C,et al.Evidence for a K/T impact event in the Pacific Ocean.Nature,1993,363:615~617. 24 Doehne E,Margolis S V.Trace-element geochemistry and mineralogy of the Cretaceous/Tertiary boundary:Identification of extrater-restrial components·Geol Soc Am Spec Pap,1990,247:367~382. 25 Officer C B,Drake C L.Late Cretaceous and paroxysmal K-T extinction.Nature,1988,326:143~149. 26 Courtillot V,Vandamme D,Besse J.Deccan volcanism at the Cretaceous/Tertiary boundary: Data and inferences.Geol Soc Am Spec Pap,1990,247:401~409. 27 Bhandari N,Gupta M,Pandey J,et al.Chemical profiles in K/T boundary section of Meghalaya,India:cometary,asteroidal or volcanic.Chemical Geology,1994,113:45-60. 28 Olmez 1,Finnegan D L,Zoller W H.Iridium emissions from Kilauea volcano.J Geophys Res,1986,91(B1):653~663. 29 Finnegan D L,Miller T L,Zoller W H.Iridium and other tracemetal enrichments from Hawaiian volcanoes.In: V L Sharpton, P D Word, Burke T. Global Catastrophes in Earth History—An Interdisciplinary Conference on Impacts,Volcanism and Mass Mortality.Geol Soc Am Spec Pap,1990,247:111~115. 30 Izett G A.The Cretaceous-Tertiary boundary interval,Raton Basin,Colorado and New Mexico,and its content of shock-metamorphosed minerals—Evidence relevant to the K/T boundary impact-extinction theory.Geol Soc Am Spec Pap,1990,249:1-100. 31 Sigurdsson H,D Hondt S,Arthur M A,et al.Glass from the Cretaceous-Tertiary boundary in Haiti.Nature,1991,349:482-485. 32 Hildebrand A R.Chicxulub crater:A possible K-T boundary impact crater on the Yucatan Peninsula, Mexico Geology,1991,19:867-871. |