Determination of Physical Properties of Oceanic Sediments From ODP Well Logs and Their Relationship to Diagenesis

根据这一建议，我们打算研究海底沉积物的物理性质及其与形成和演化过程的关系。这些沉积物的性质将主要从海洋钻探计划巡航期间钻探的井中进行测量。如果可能的话，我们还将对钻探过程中回收的这些沉积物的任何实际样本进行直接的实验室测量。该提案包括三个具体的工作任务：1)分析海洋钻探计划和以前的深海钻探项目收集的现有数据集，并在未来的ODP巡航中收集进一步的数据。对这些数据集进行分析，得到沉积物的横波速度。2)改进从采集的全波形声波测井资料中获取沉积物横波速度的方法。这包括提高我们计算的速度和准确性，更好的信号处理技术来减少数据中的噪音，以及改进声波在这些沉积物中的传播模型。3)只要有可能，就在实验室里研究这些沉积物。这些研究将包括在高功率扫描电子显微镜下检查样品，以找出它们的结构和组成，直接测量横波速度和其他物理性质，将它们与井中测量的结果进行比较，检查这些数据如何符合有关这些沉积物形成和演化的现有理论，以及，如有必要，发展有关这些过程的新理论。

Under this proposal, we intend to study the physical properties of ocean bottom sediments and their relationship to the processes by which they were formed and evolved. The properties of these sediments will be mostly obtained from measurements made down the wells drilled during cruises of the Ocean Drilling Program. If possible, we will also make direct laboratory measurements on any actual samples of these sediments recovered during drilling. This proposal involves three specific work tasks: 1) Analyze existing data sets collected during the Ocean Drilling Program and the previous Deep Sea Drilling Project and collect further data in future ODP cruises. These data sets will be analyzed to obtained the shear wave velocity of the sediments. 2) Refine our method of obtaining shear wave velocity of the sediments from the full waveform acoustic logging data collected. This involves increasing the speed and accuracy of our calculations, better signal processing techniques to reduce noise in the data, and improvements in the model of sound wave propagations in these sediments. 3) Study these sediments in the laboratory, whenever it is possible to do so. These studies will involve inspecting the samples under a high power Scanning Electron Microscope to find out their structure and composition, making direct measurements of shear wave velocity and other physical properties, comparing them to measurements made in the well, examining how these data fit into existing theories about the formation and evolution of these sediments, and, if necessary, developing new theory about these processes.