GRAIN-SIZE INDICES CLASSIFICATION AND ENVIRONMENT
GRAIN-SIZE INDICES CLASSIFICATION AND ENVIRONMENT
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DOI：
10.1111/j.1365-3091.1968.tb01101.x
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发表时间：
1968-01-01
期刊：
影响因子：
3.5
通讯作者：
DOEGLAS, DJ
中科院分区：
文献类型：
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作者：
DOEGLAS, DJ
采用基于q1、mdand q3的Wentworth phi值的指数对沉积物进行质地分类。温特沃斯phi值可以进行详细的细分。基于温特沃斯指数的命名法被开发。索引，以及较小程度上的名称，显示了基于整数单位的排序和偏度。分级方案给出了从砾石到细粘土的连续尺度。q1mdq3‐指数可用于区分河流、海相和黄土沉积物。第1百分位和第99百分位指数的增加，给出了5位数指数，增加了确定环境的可能性：河流沉积物可以与海滩和沙丘沉积物区分开来，更详细地说，可以与浅海和沿海沉积物区分开来。这些指数可以由数据处理机处理。
Indices based on Wentworth phi values ofQ1,MdandQ3are used for textural classification of sediments. Wentworth phi values enable a detailed subdivision. A nomenclature based on the Wentworth phi indices is developed. The indices, and to a smaller degree the names, show sorting and skewness based on integer phi units. The classification scheme gives a continuous scale from gravel to fine clay. TheQ1MdQ3‐indices can be used for distinction of river, marine and loess deposits. The addition of indices of the 1st and 99th percentile, giving 5‐digit indices, augments the possibilities for a determination of the environment: river deposits can be distinguished from beach and dune sediments and in more detail from shallow marine and coastal deposits. The indices can be handled by data‐processing machines.