COLLABORATIVE RESEARCH: A Sequence-, Chemo-, and Biostratigraphic Study of Late Early Cambrian Rocks, Southern Selwyn Basin, Mackenzie Mountains, N.W.T., Canada

合作研究：加拿大西北麦肯齐山脉南塞尔温盆地早寒武世晚期岩石的层序、化学和生物地层研究

• 批准号: 0106885
• 负责人: Bruce Lieberman
• 金额: $ 11.79万
• 依托单位: University of Kansas Center for Research Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0106885&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Sequence; Chemo; Biostratigraphic

ABSTRACT Collaborative Research: A Sequence-, Chemo-, Biostratigraphic Study of Late Early Cambrian Rocks, Southern Selwyn Basin, Mackenzie Mountains, Canada This project investigates how early episodes of animal evolution, which occurred roughly 520 million years ago during the so-called Cambrian radiation, were influenced by environmental changes. To investigate these issues we will study the sedimentology, paleontology, and geochemistry of the Early Cambrian rocks of the Mackenzie Mountains, Northwest Territories, Canada. This is a remote location, but it has a remarkably complete geological record for the Early Cambrian interval. This gives us a window into the life forms and environments of both shallow and deep water settings, a situation found nowhere else for this time period. The types of environmental changes we will study include both changes in the relative level of the seas as well as temperature changes: the two are partly linked. During the Cambrian radiation there may have been rapid oscillations between relatively warm and cold climates. To determine the nature of these environmental changes, it is necessary to understand the variations in the rock types, which we will study in detail. It is also necessary to study when these variations occurred; this we will accomplish by documenting the sequence of fossil species and through use of chemical isotopes. Evolutionary changes and extinction events in this region, and elsewhere, and their relationship to the environmental changes, will also be documented. In this manner, we will not only come to better understand the nature of the environmental changes that occurred during this critical interval in earth history, but we will also determine how one of the key episodes in the history of life may have been fundamentally driven by climatic changes.

摘要协作研究：一项序列，化学，化学，生物地层研究早期寒武纪岩石，南部塞尔温盆地，加拿大麦肯齐山脉的序列研究，该项目调查了动物进化的早期发作，大约发生在5.2亿年前，发生了大约5.2亿年前的寒武纪辐射，受到环境变化的影响。 为了调查这些问题，我们将研究加拿大西北地区麦肯齐山脉早期寒武纪岩石的沉积学，古生物学和地球化学。 这是一个遥远的位置，但在寒武纪早期的间隔中具有非常完整的地质记录。 这为我们提供了一个进入浅水和深水环境的生命形式和环境的窗口，在这个时期，这种情况在其他任何地方都没有。我们将研究的环境变化的类型包括海洋相对水平的变化以及温度变化：两者部分相连。 在寒武纪辐射期间，相对温暖和寒冷的气候之间可能迅速振荡。 为了确定这些环境变化的性质，有必要了解岩石类型的变化，我们将详细研究。 还必须研究这些变化何时发生。我们将通过记录化石物种的顺序和使用化学同位素来实现这一目标。 该地区以及其他地方的进化变化和灭绝事件以及它们与环境变化的关系也将被记录。 通过这种方式，我们不仅将更好地了解地球历史关键间隔期间环境变化的性质，而且我们还将确定生活史上的关键事件之一可能是由气候变化从根本上驱动的。