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.

沉积过程与地层反应之间的关系仍然很少了解。 结果，地层拼接的起源是大多数沉积盆地的基本构建基块，仍然引起极大的争议。 我们将研究寒武纪中部至中部卡拉拉地层的副序列，这是一个较大的序列，从浅海碳酸盐到浅海到浅海（甚至可能是冲积）硅质形成沉积物的横向范围。 我们将：1）识别和关联卡拉拉形成及其等效物中的拼字点； 2）表征绑定副词的表面，以确定副词起始和终止模式的信息； 3）在既定的副标中绘制特定的相，以获取有关其厚度，几何和空间分布的信息； 4）描述和解释副词内的特定相，以提供有关沉积物生产和扩散过程，水深，古气候和更多局部古地理过程的信息。 如果描绘了副词内的相的多样性和几何形状，则可以更准确地确定负责其形成的机制，并在可能的情况下进行量化。 这些信息可以极大地完善古地理，水深，海平面历史，沉降历史，古气候以及本地或地区构造事件的模型。