The Relationship between Depositional Process and Strati- graphic Response: Development of Parasequences in Carbonate/Siliclastic Depositional Systems

沉积过程与地层响应的关系：碳酸盐/硅碎屑沉积体系中准层序的发育

• 批准号: 8916870
• 负责人: John Grotzinger
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8916870&HistoricalAwards=false
• 关键词: Relationship; between; Depositional; Process; Strati

The relationship between sedimentary process and stratigraphic response is still poorly understood. As a result, the origin of stratigraphic parasequences, the fundamental building block of most sedimentary basins, is still highly controversial. We will examine the parasequences of the lower to Middle Cambrian Carrara Formation, a larger-scale sequence which ranges laterally from shallow marine carbonate to shallow marine (and possibly alluvial) siliciclastic sediments. We will: 1) identify and correlate parasequences within the Carrara Formation and its equivalents; 2) Characterize surfaces that bound parasequences for information useful in determining the mode(s) of parasequence initiation and termination; 3) Map specific facies within established parasequences to obtain information on their thickness, geometry, and spatial distribution; 4) Describe and interpret specific facies within parasequences to provide information on the processes of sediment production and dispersal, water depths, paleoclimate, and more local paleogeography. If the diversity and geometry of facies within parasequences are delineated, then the mechanisms responsible for their formation can be more accurately determined and, where possible, quantified. This information could greatly refine models for paleogeography, water depths, sea-level history, subsidence history, paleoclimate, and local or regional tectonic events.

沉积作用与 地层响应仍然知之甚少。 因此，在本发明中， 地层准层序的起源， 大多数沉积盆地的基石，仍然是高度 争议 我们将研究下到中的准层序 寒武纪卡拉拉组是一个规模较大的层序， 横向上从浅海碳酸盐岩到浅海（以及 可能是冲积的）硅质沉积物。 我们将：1）识别 并对比了卡拉拉组及其 等价物; 2）表征约束准层序的表面 以获取确定准层序模式的有用信息 3）绘制特定相， 建立准层序，以获得关于其 厚度、几何形状和空间分布; 4）描述和 解释准层序内的特定相， 关于沉积物产生过程的资料， 扩散，水深，古气候，以及更多的本地 古地理学 如果准层序内相的多样性和几何形状 然后，负责他们的机制， 可以更准确地确定地层，在可能的情况下， 量化。 这些信息可以大大改进模型， 古地理，水深，海平面历史，沉降 历史、古气候和局部或区域构造事件。