The early Cretaceous of Greenland: Climatic and biotic changes in the high latitudes

格陵兰岛白垩纪早期：高纬度地区的气候和生物变化

• 批准号: 47612715
• 负责人: Professor Dr. Jörg Mutterlose
• 金额: --
• 依托单位: Institut für Geologie, Mineralogie und Geophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/47612715?language=en
• 关键词: early; Cretaceous; Greenland; Climatic; biotic

The climatic evolution of the early Cretaceous (Valanginian - Hauterivian) is currently interpreted in two different ways. The view of a generally warm-equable greenhouse world is questioned by a rather differentiated picture with cold snaps possibly even causing polar ice caps. These contradictions may have partly been caused by a lack of data from the high latitudes and relative poor biostratigraphic control. We therefore propose a multi proxy approach based in the high latitudes (north-east Greenland) to better understand the palaeoclimatic and palaeoceanographic evolution of the early Cretaceous. Based on a detailed biostratigraphic scheme (ammonites) we intend to a) understand the paleoecology and biogeography of calcareous nannofossils, b) study the biogeography of both ammonites and belemnites, c) evaluate the stable isotope record of belemnites, d) develop a Strontium isotope curve, and e) Interpret the Valanginian - Hauterivian interval with respect to its palaeoclimate and palaeoceanography.

早白垩世（Valanginian - Hauterivian）的气候演化目前有两种不同的解释。一个总体上温暖均衡的温室世界的观点受到了一个相当不同的图片的质疑，寒流甚至可能导致极地冰盖。这些矛盾可能部分是由于缺乏高纬度地区的数据和相对较差的生物地层控制造成的。因此，我们提出了一个多代理的方法，在高纬度地区（格陵兰东北部），以更好地了解早白垩世的古气候和古海洋学的演变。根据详细的生物地层学方案（菊石），我们打算a）了解钙质超微化石的古生态学和古地理学，B）研究菊石和箭石的古地理学，c）评价箭石的稳定同位素记录，d）开发锶同位素曲线，e）解释Valanginian - Hauterivian间隔的古气候和古海洋学。