Iridium profiles and delivery across the Cretaceous/Paleogene boundary
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- 作者：Selen Esmeray-Senleta ; 1 ; selenesmeray@gmail.com" class="auth_mail" title="E-mail the corresponding author ; selenesmeray@chevron.com" class="auth_mail" title="E-mail the corresponding author ; Kenneth G. Millera ; Robert M. Sherrella ; b ; Turgay Senletc ; Johan Vellekoopd ; Henk Brinkhuise
- 关键词：K/Pg boundary ; impact iridium ; iridium inventory ; advection&ndash ; diffusion model ; bioturbation
- 刊名：Earth and Planetary Science Letters
- 出版年：2017
- 出版时间：1 January 2017
- 年：2017
- 卷：457
- 期：Complete
- 页码：117-126
- 全文大小：2831 K
文摘
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Concentration and profile shape of Ir are not uniform in closely spaced K/Pg sites.
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The Lagrangian advection–diffusion model explains Ir profile shapes quantitatively.
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Ir profiles were determined primarily by sediment mixing via bioturbation.
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The depth-integrated Ir inventory is similar in the majority of the cores studied.
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Total Ir delivery at time of the K/Pg event was spatially uniform in the region.