Early Diagenetic Effects of Phases and Abundances of Water in Skeletal Carbonates in Coral Reef and Associated Sediments on San Salvador Island, Bahamas

巴哈马圣萨尔瓦多岛珊瑚礁和相关沉积物中骨架碳酸盐中水的相和丰度的早期成岩作用

• 批准号: 8721094
• 负责人: Susan Gaffey
• 金额: $ 7.61万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8721094&HistoricalAwards=false
• 关键词: Early; Diagenetic; Effects; Phases; Abundances

Carbonate skeletons of plants and animals are the major components of marine carbonate sediments. The chemical and mineralogical compositions of these skeletons both control responses of skeletal material to and act as tracers for monitoring diagenetic processes. Although water (liquid and bound inorganic H2O and OH-) is the second or third most abundant component of carbonate skeletons, little is known about the different phases present, their abundances, or how these different phases affect or are affected by diagenetic alteration, even in skeletons of the most important sediment-producing taxa. The goals of this research are to study the interactions between intrinsic water in carbonate skeletons and early diagenetic processes. The first object of the work will be to quantitatively characterize the water content of skeletons of living representatives of major framework and sediment producing taxa. Amount of water present, the phases in which it occurs, and the abundances of these phases will be related to skeletal mineralogy, chemistry, and microstructure, and to taxonomy. The second phase of the work will examine interactions of early diagenetic processes with the forms and abundance of water in fossil skeletons of these same taxa, and the ways in which early changes in abundance and form of water affect the subsequent diagenetic alteration of these skeletons.

植物和动物的碳酸盐骨骼是海洋碳酸盐沉积物的主要组成部分。 这些骨骼的化学和矿物成分既控制骨骼材料对成岩过程的反应，又充当监测成岩过程的示踪剂。 尽管水（液体和结合的无机H2O和OH-）是碳酸盐骨架中第二或第三丰富的成分，但人们对存在的不同相、它们的丰度或这些不同相如何影响成岩蚀变或受成岩蚀变影响知之甚少，甚至在最重要的沉积物生成类群的骨架中也是如此。 这项研究的目的是研究碳酸盐骨架中固有水与早期成岩过程之间的相互作用。 这项工作的第一个目标是定量描述主要骨架和沉积物产生类群的活体代表骨骼的含水量。 水的存在量、水发生的阶段以及这些阶段的丰度将与骨骼矿物学、化学、微观结构以及分类学相关。 该工作的第二阶段将研究早期成岩过程与这些相同类群化石骨骼中水的形式和丰度的相互作用，以及水丰度和形式的早期变化如何影响这些骨骼随后的成岩变化。