X-射线岩心扫描系统对海洋沉积物成分测定质量的综合评价和校正

张喜林; 范德江; 王亮; 廖永杰; 姚政权

X-射线岩心扫描系统对海洋沉积物成分测定质量的综合评价和校正

1.
中国海洋大学海洋地球科学学院, 海底科学与探测技术教育部重点实验室, 山东青岛 266100
2.
国家海洋局第一海洋研究所, 海洋沉积与环境地质国家海洋局重点实验室, 山东青岛 266061

基金项目: 国家自然科学基金项目（40976020，41030856）；国家重点基础研究发展计划项目（2010CB951202）。

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出版历程
- 收稿日期: 2012-06-01

The calibration and quality evaluation of elemental analysis results of marine sediment measured by an X-ray fluorescence core scanner

1.
Key Laboratory of Ministry of Education for Submarine Geosciences and Technology, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

摘要

摘要: 基于采自东海内陆架泥质区的沉积物岩心，利用X-射线岩心扫描系统对其进行高分辨成分扫描，同时利用台式偏振X射线荧光光谱仪对该岩心进行元素测定，通过对比研究评价了X-射线岩心扫描系统元素扫描分析质量。研究表明：（1）X-射线岩心扫描系统对海洋沉积物元素分析质量可以分为四类，Ⅰ类元素分析结果可信度高、可以直接作为含量对待，Ⅱ类具有重要的参考价值，Ⅲ类具有一定参考价值，而Ⅳ类无参考价值。（2）海洋沉积物的X-射线岩心扫描元素分析受到压实作用的影响，其中钙、铁、钾、钛、硅等5种元素压实效应明显，通过压实校正可以有效消除压实作用造成的元素垂向上的系统波动。（3）对钙、铁、钾、钛、硅等5种元素，X-射线岩心扫描强度与传统的XRF元素含量之间具有良好的线性关系，相关系数在0.47~0.87，可以据此进行扫描强度和元素含量的换算。
- X-射线岩心扫描仪 /
- 海洋沉积物 /
- 元素分析 /
- 质量评价 /
- 压实校正 /
- 高分辨沉积记录
Abstract: Based on Core C0702 in the East China Sea mud area, an elemental analysis quality was appraised by comparing the results of two analysis methods, which are an X-ray fluorescence core scanner (X-ray core scanner) and an X-ray fluorescence spectrometer (XRF). The results show that: (1) The elements detected by the X-ray core scanner can be divided into four classes. Elements in Class Ⅰ show a high detecting quality, and the intensities of these elemente measured by the X-ray core scanner can be taken as contents directly. The measuring intensities of elements in Class Ⅱ are great significance, and those in Class Ⅲ are small significance. However,the measured intensities of elements in Class Ⅳ are worthless and minor significant. (2) The analysis results of element itensities in marine sediments detected by the X-ray core scanner affected by compaction, especially, Ca,Fe,K,Ti,Si are more vulnerable. A formula for eliminating this effect via calibration is proposed. (3) The measuring results of Ca,Fe,K,Si,Ti detected by the two methods show a good linear relationship (with correlation coefficients of 0.46-0.87), so the element intensities of Ca,Fe,K,Si,Ti detected by the X-ray core scanner could be converted into the chemical content according to the relationship.
- X-ray core scanner /
- marine sediment /
- elemental analysis /
- quality evaluation /
- compaction correction /
- high-resolution sedimentary record

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参考文献(17)

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