Sedimentation in the Tide-Wave and Tide-River Transition Zones

潮浪和潮河过渡带的沉积

• 批准号: 7553-2012
• 负责人: Dalrymple, Robert
• 金额: $ 2.33万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=544423
• 关键词: Sedimentation; Tide; Wave; River; Transition

The interface between the land and the sea is one of the most complex areas on earth. The deposits formed here are extremely important because they host a significant fraction of the hydrocarbon reserves in Canada and the world, including the world-famous McMurray Oil Sands of northern Alberta. I propose to investigate the deposits of this crucial interface, using an approach that breaks out of the "end-member syndrome" that has characterized much of the previous work on coastal environments, to investigate the complex interactions between the three fundamental processes that control the dynamics these environments and the nature of the facies and their architectural organization within ancient sedimentary successions. Rather than focusing on tide-dominated environments as my past work has done, I propose to explore the interactions between tidal currents and waves on the one hand, and river flow on the other. These transitional zones are widespread on the present-day world, and their deposits should be equally abundant in ancient sedimentary basins, and yet they are incompletely documented because of the scarcity of models for what these deposits look like. The proposed work consists of a set of modern and ancient deposits that have been selected because they are either known or believed to illustrate the process transitions that are the focus of this study, and because they have served as important reference point for interpretations and/or are superbly exposed, thereby allowing unparalleled opportunities for the study of the 3-dimensional architecture of the deposits. Study areas where the river-tide transition will be studied are: the Rio Guayas and its tributaries, Ecuador; the Lajas Fm., Neuquén Basin, Argentina; the Neslen Fm., Utah; and as yet to be chosen deposit in the Spanish Pyrenees. This work will be supplemented by ongoing work on the McMurray Fm., Alberta. The wave-tide transition will be investigated in the Lajas Fm., Argentina; the Sego Sandstone, Utah; and the Haystack Mtns. Fm., Wyoming. This research program will significantly improve the ability to create sophisticated paleoenvironmental and paleoclimatic reconstructions, and to extract hydrocarbons more efficiently.

土地与海洋之间的界面是地球上最复杂的地区之一。这里形成的沉积物非常重要，因为它们在加拿大和世界上拥有很大一部分碳氢化合物储量，包括艾伯塔省北部的世界著名的麦克默里油砂。我建议使用一种方法来研究这种关键界面的沉积物，该方法突破了“末端成员综合征”，这些方法表征了先前在沿海环境上的许多工作，以研究控制这些环境的三个基本过程之间的复杂相互作用，这些过程与这些设施的性质及其建筑性质及其在古代沉积性的连续中的性质及其建筑组织。我没有像过去的工作那样专注于潮汐主导的环境，而是建议一方面探索潮流和波浪之间的相互作用，另一方面河流流动。这些过渡区域在当今的世界上是广泛的，它们的沉积物在古老的沉积低音中应同样丰富，但是由于模型缺乏这些沉积物的外观，它们的沉积物不完全记录。拟议的工作由一组现代和古老的沉积物组成，因为它们是已知或被认为可以说明这是本研究重点的过程转换的原因，并且因为它们已成为解释的重要参考点和/或非常暴露，从而允许无与伦比的矿床结构的研究机会。研究河流过渡的研究区域是：里奥瓜亚斯及其支流，厄瓜多尔；拉贾斯（Lajas）Fm。犹他州的内斯·FM。到目前为止，将被选为西班牙比利牛斯山脉的存款。这项工作将通过艾伯塔省McMurray FM。正在进行的工作来补充。波浪潮过渡将在阿根廷的Lajas Fm。进行研究；犹他州的Sego砂岩；和Haystack Mtns。 FM。，怀俄明州。该研究计划将显着提高创建复杂的古环境和古气候重建的能力，并更有效地提取碳氢化合物。