članak: 1 od 1  
Journal of the Serbian Chemical Society
2006, vol. 71, br. 7, str. 793-806
jezik rada: engleski
izvorni naučni članak
doi:10.2298/JSC0607793P

Geohemija kreda-tercijar graničnog sloja (Fish Clay) iz Stevns Klint-a (Danska): Ir, Ni i Zn u kerogenu
aUniverzitet u Nišu, Prirodno-matematički fakultet
bUniverzitet u Nišu, Tehnološki fakultet, Leskovac
cInstitut za nuklearne nauke Vinča

Sažetak

Izvršena je geohemijska analiza tragova metala (Ir, Ni i Zn) u kerogenu crnog laporca kreda-tercijar graničnog sloja nalazita (Fish Clay) u Stevns Klint-u (crkva Højerup). Podaci za ovaj kerogen se slažu sa prethodnim pretpostavkama da je ovaj (nerastvorni) geoorganski polimer nastao od humičnih supstanci (uglavnom humičnih kiselina) okolnog zemljišta. Znatan deo Ir, Ni i Zn u strukturi kerogena je verovatno bio sadržan u tim supstancama pri njihovom prenosu na mesto sedimentacije. Pretpostavlja se da su ovi humati verovatno transportovani uz pomoć kiselih površinskih voda (uzrokovanih KT asteroidnim udarom) u plitki morski basen Stevns Klint. Ukazano je takođe da lokalno spiranje ovim vodama asteroidne padavine imalo važnu ulogu u snabdevanju Ir Ni i Zn za humične supstance. Verovatno da su Ir, Ni i Zn u kerogenu nastali od hondritskog dela asteroidne padavine.

Ključne reči

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