The determination of lithology from core physical properties measurements

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Title: The determination of lithology from core physical properties measurements
Author: Clark, Paula Ann
Abstract: I performed statistical analysis of shipboard physical properties data from the Ocean Drilling Program to investigate relationships between the physical properties data and the lithology of deep ocean cores . The use of non -invasive experiments on deep -sea core samples offers a near real -time view of sediments and requires little user interaction or interpretation . The speed , density , and accuracy of these experiments make efficient use of limited space and expensive ship time . The fact that these experiments are noninvasive also allows for further post -cruise studies . For the study I chose Leg 162 (July -September 1995 in the North Atlantic ) for the density of data , the experiments performed , the quantity and quality of post -cruise publications and the influence of different , yet dominant , environments . Combining similar lithologies across a Leg increased sample size and offered a more statistically normalized sample . Interpolation of the physical properties data matched the intervals used for the lithological determinations . Statistical methods included univariate and multivariate correlation matrices , mean and standard deviations , the significance of the correlations , and a model equation for each lithology and the Leg as a whole . By looking at the physical properties , one can estimate the lithology . This research is important because sedimentological and geophysical approaches can be merged to offer a more accurate , more detailed view of the depositional history of oceanic cores . Through statistical analysis of geophysical data , the findings duplicate the findings of the sedimentologists without the painstaking examinations typical of this type of research . Performing experiments and analysis quickly and accurately with minimal operator error allows for immediate discussions and results . Use of this research as a data verification tool provides the ability to distinguish data acquisition problems and misidentifications . This application has proven invaluable for allowing a non -sedimentologist quantitative insight into the lithology .
URI: http : / /hdl .handle .net /1969 .1 /3950
Date: 2006-08-16

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The determination of lithology from core physical properties measurements. Available electronically from http : / /hdl .handle .net /1969 .1 /3950 .

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