Statistical Correlation of Physical Properties and Sound Velocity in Sediments
Statistical Correlation of Physical Properties and Sound Velocity in Sediments
复制标题
DOI：
10.1007/978-1-4684-0838-6_18
复制
发表时间：
1974
期刊：
影响因子：
--
通讯作者：
R. S. Anderson
中科院分区：
文献类型：
--
作者：
R. S. Anderson
一个系统的逐步回归分析是用来确定声速和物理性质之间的统计相关性在实验室测量的沉积物从82个核心采取在大西洋，太平洋，印度洋和地中海。碳酸盐含量和抗剪强度与沉积物声速无显著相关性。平均晶粒度（单位：φ）和孔隙度是与声速相关性最高的两个参数。包括孔隙比，湿密度，比重，或平均粒度统计的较高的时刻并没有显着改善速度的预测方程。数据按不同水深、海洋或地文省分组，以确定这些参数对速度-孔隙度和速度-粒度关系的影响。结果表明，作为晶粒尺寸的函数的速度的预测是通过使用这些分组的数据得到改善。特别是，对于给定的粒度，大西洋中的速度高于太平洋。对于一个给定的孔隙度，速度是较高的海洋上升区比其他地方。总的来说，对于所有其他省份，数据可以用一个方程很好地表示，该方程将声速V（米/秒）与孔隙率P（百分比）联系起来。方程为V=-22.9 P+ 0.1500 p2+ 2367，标准误差为35 m/sec。一个应用是使用这个方程和另一个方程，涉及密度孔隙度。对于每个数据点，根据测量的孔隙度预测的沉积物速度和密度值确定海底损失，然后将其与根据实际测量的速度和密度确定的海底损失进行比较。对于比重在2.18至3.43 gm/cm 3的宽范围内的每个数据点，这两次测定之间的差异小于3 dB。481
A systematic stepwise regression analysis is used to determine the statistical correlation between sound velocity and physical properties measured in the laboratory on sediments from 82 cores taken in the Atlantic, Pacific, and Indian Oceans, and the Mediterranean Sea. Carbonate content and shear strength show no significant correlation with sediment sound velocity. Mean grain size in phi units and porosity are the two parameters showing the highest significant correlation with sound velocity. The inclusion of void ratio, wet density, specific gravity, or the higher moments of the mean grain size statistics does not significantly improve the prediction equation for velocity. The data is grouped by different water depths, oceans, or physiographic provinces to determine the effect of these parameters on the velocity-porosity and velocitygrain size relationships. Results show that the prediction of velocity as a function of grain size is improved by using these groupings of data. In particular, for a given grain size, the velocity is higher in the Atlantic Ocean than in the Pacific Ocean. For a given porosity, the velocity is higher in the oceanic rise provinces than elsewhere. Overall, for all other provinces the data is well represented by one equation relating sound velocity V in meters per second to porosity P in percent. The equation is V=-22.9 P+ 0.1500 p2+ 2367 with a standard error of 35 m/sec. One application is made using this equation and another equation which relates density to porosity. For each data point, a bottom loss is determined from the value of the sediment velocity and density predicted from a measured porosity, and then compared to a bottom loss determined from the actual meesured velocity and density. The difference between these two determinations is less than 3 dB for each data point having a specific gravity within the broad range of 2.18 to 3.43 gm/cm3. 481