| 频率分布曲线和概率累积曲线在沉积物粒度数据分析中应用的对比 |
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| 引用本文： | 范天来,范育新.频率分布曲线和概率累积曲线在沉积物粒度数据分析中应用的对比[J].甘肃地质学报,2010,19(2):32-37. |
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| 作者姓名： | 范天来 范育新 |
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| 作者单位： | 兰州大学西部环境教育部重点实验室,甘肃兰州730000 |
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| 摘 要： | 本文以乌兰布和沙漠钻孔岩芯沉积物为例,测量了其中沙丘砂和沙丘底部湖相沉积物的粒度。通过对比和分析同一样品在粒度概率累积曲线和频率曲线上所反映的信息,发现概率累积曲线能更直观、准确、定量地显示沉积物粒度组成及各特征组分的分选性,包含有比频率曲线更丰富的沉积环境信息。
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| 关 键 词： | 粒度分析 频率分布曲线 概率累积曲线 应用对比 |
A COMPARISON OF GRAIN SIZE EXPRESSION METHODS：A CASE STUDY |
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| FAN Tian-lai,FAN Yu-xin.A COMPARISON OF GRAIN SIZE EXPRESSION METHODS：A CASE STUDY[J].Acta Geologica Gansu,2010,19(2):32-37. |
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| Authors: | FAN Tian-lai FAN Yu-xin |
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| Institution: | (Key Laboratory of Western China＇s Environmental Systems (Ministry of Education), Lanzhou University, Lanzhou 730000, China) |
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| Abstract: | A comparison of sedimentary information derived from grain size frequency distribution curves and from probability cumulative curves are made by using grain size data of core sediments obtained from the Ulan Buh Desert. More sedimentary information is found to be obtained from the probability cumulative curve comprehensively and scientifically than from the grain size percentage distribution curve, especially some numerical information of the grain size characteristics, such as slope of a segment line which can visually diseribe sorting features of the sediment, and relative content of the specific component. |
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| Keywords: | comparison sedimentary information frequency distribution curve probability cumulative curve |
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