从统计分析看控制东海重矿物分布的因素
STUDY OF THE FACTORS CONTROLLING HEAVY MINERAL DISTRIBUTION ON THE EAST CHINA SEA CONTINENTAL SHELF BY USING STATISTICAL ANALYSIS
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摘要: 任何地质作用过程都是复杂的,东海也不例外,其沉积过程具有长期性、继承性和叠加性的特点.因而反映在矿物组合及其分布变化上较为复杂,影响因素颇多.然而,运用数学地质方法却可帮助我们寻找和确定其主要的影响因素,查明它们的相互关系,甚至建立定量描述的模式.而这正是传统地质学研究中的难题之一.Abstract: In This paper, quantitative studies are made of the space distribution and variation of heavy minerals in the sediments of the East China Sea continental shelf using mathematic statistical methods.The paper discusses the effect of geological processes on the distribution and changes of the heavy minerals since the late Pleistocene, and suggests regional and local variatipn models of heavy minerals in theEast China Sea. Regression analyses of 122 samples taken from the continental shelf indicate that the change of content of heavy minerals caused by the change of medium grain size in sedment ranges only from 0.04% to 13%,which shows that hydraulic fractionation by sediment size has less effect on dispersion and concentration o# heavy minerals.
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中国科学院地质研究所,数学地质引论,地质出版社.1977. 中国科学院数学研究所,常用数理统计方法,科学出版社.1973. Lmbric,J.and Van Andel,T.H.,Geological Society of America Bulletin,15(1984),1131-1158. Romeo M.Flores,Journal of Sedimentary Petrology,48(1978).1.259-280. -
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