Comparative Ichnology of Pelagic Limestone and Chalk, New Zealand and Northern Europe

新西兰和北欧远洋石灰岩和白垩的比较技术

• 批准号: 9005088
• 负责人: Allan Ekdale
• 金额: $ 7.7万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-15 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9005088&HistoricalAwards=false
• 关键词: Comparative; Ichnology; Pelagic; Limestone; Chalk

PI will investigate the animal sediment relations and biogenic sedimentary structures of palagic carbonate systems in both shelf-sea and deep-sea settings. Emphasis will be on interpreting the environmentally controlled trace fossil associations, ichnofabrics (modes of occurrence, preservation, deformation and juxtaposition of trace fossils) and paleoethology (fossilized evidence of animal behavior) preserved in pelagic deposits in New Zealand and Denmark. Palagic sediment is ideal for such studies, because (a) bioturbation rates typically far exceed depositional rates, (b) pelagic ooze occurs in regimes far removed from direct perturbations of continental sediment influx, and (c) the open-water setting allows for global comparisons and synthesis. Similarities and differences of ichnofabric, ichnofacies and particular ethologic types of trace fossils will be documented in pelagic limestone and chalk deposited in mid-latitude boreal seas of the Southern and Northern Hemispheres during Late Cretaceous and Early Tertiary time. The work will focus on the Maastrichtian-Oligocene Amuri Limestone on the South Island of New Zealand and Maastrichtian-Paleocene chalk in Denmark. In addition, DSDP/ODP and commercial drill cores of deep-sea carbonate sections from nearby sites in the southwestern Pacific and northeastern Atlantic will be examined. This ichnologic research will provide a detailed picture of organism-substrate interrelationships in ancient pelagic ooze habitats, and it also will allow construction of a global picture of endobenthic communities in non-tropical, mid-latitude, epicratonic sea-bottom environments.

PI将调查动物沉积物关系， 古生代碳酸盐体系的生物沉积构造 包括陆架海和深海环境。 重点将是 解释环境控制的遗迹化石 协会，遗迹组构（发生模式，保存， 遗迹化石的变形和并列）和古动物行为学 （动物行为的化石证据）保存在深海中 在新西兰和丹麦的矿床。 远洋沉积物是理想的 对于这样的研究，因为（a）生物扰动率通常远 超过沉积速率，（B）远洋软泥出现在远 除去大陆沉积物流入的直接扰动， 和（c）开放水域环境允许进行全球比较， 合成. 遗迹组构、遗迹相、遗迹群的异同 遗迹化石的特定行为学类型将被记录在 沉积在中纬度北部海域的远洋石灰岩和白垩 晚白垩世南、北方半球 第三纪早期 这项工作将集中在 南岛马斯特里赫特-渐新世Amuri灰岩 新西兰和丹麦的马斯特里赫特-古新世白垩。 在 此外，DSDP/ODP和深海商业岩心 西南太平洋附近的碳酸盐岩剖面 和东北大西洋将被检查。 这个遗迹 研究将提供一个详细的图片， 在古代远洋软泥生境的相互关系，它也 将有助于构建全球底栖生物 非热带、中纬度、地震海底群落 环境.