An emerging palaeoceanographic 'missing link': multidisciplinary study of rarely recovered parts of deep-sea Santonian-Campanian transition from Shatsky Rise
An emerging palaeoceanographic 'missing link': multidisciplinary study of rarely recovered parts of deep-sea Santonian-Campanian transition from Shatsky Rise
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新兴的古海洋学“缺失环节”：对沙茨基海隆深海桑托尼亚-坎帕尼亚过渡部分罕见恢复的部分进行多学科研究
DOI：
10.1144/jgs2012-137
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发表时间：
2013
影响因子：
2.7
通讯作者：
Ando A
中科院分区：
文献类型：
--
作者：
Ando A
白垩纪Santonian-Campanian过渡期的深海记录通常被广泛的不整合（代表<1000万年的间断）所中断。由此产生的古海洋学的差距，现在可以部分弥合最近的短核心的深海软泥从沙茨基隆起（综合大洋钻探计划（IODP）网站U1348），精确的多学科的年龄限制在此开发。从保存完好的底栖有孔虫获得的新氧同位素数据，以及从以前太平洋深海剖面获得的准确汇编的可比底栖数据，显示出一个大的（c. +1‰）早坎帕尼亚期位移。我们认为Santonian-Campanian气候转变不是渐进的，而是在持续的白垩纪中期温室条件之后的第一个主要冷却步骤。补充材料详细的分析方法，包括生物地层学注释和Sr同位素年代学，补充图（地点图;补充地球化学、同位素和微体古生物学结果;古地磁结果;全球Sr同位素汇编和年龄模型;底栖有孔虫稳定同位素汇编）、微体化石出现情况表和数字数据可在www.example.com上查阅http://www.geolsoc.org.uk/SUP18598。
The Cretaceous deep-sea record of the Santonian–Campanian transition is commonly interrupted by an extensive unconformity (representing <10 Myr of hiatus). The resultant palaeoceanographic gap can now be partly bridged by a recent short core of pelagic ooze from Shatsky Rise (Integrated Ocean Drilling Program (IODP) Site U1348), with precise multidisciplinary age constraints developed herein. New oxygen isotope data from very well-preserved benthic foraminifera, together with accurately compiled comparable benthic data from previous Pacific deep-sea sections, exhibit a large (c. +1‰) early Campanian shift. We propose the Santonian–Campanian climatic transition was not gradual but was the first major cooling step after sustained mid-Cretaceous hothouse conditions.Supplementary materialDetailed analytical methods including biostratigraphic notes and Sr isotopic chronology, supplementary figures (locality map; additional geochemical, isotopic and micropalaeontological results; palaeomagnetic results; global Sr isotope compilation and age model; benthic foraminiferal stable isotope compilation), tables of microfossil occurrences and numerical data are available at http://www.geolsoc.org.uk/SUP18598.