DETRITAL SEDIMENTARY ROCK CLASSIFICATION AND NOMENCLATURE FOR USE IN NEW-ZEALAND
DETRITAL SEDIMENTARY ROCK CLASSIFICATION AND NOMENCLATURE FOR USE IN NEW-ZEALAND
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DOI：
10.1080/00288306.1970.10418211
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发表时间：
1970-01-01
影响因子：
2.2
通讯作者：
LEWIS, DW
中科院分区：
文献类型：
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作者：
FOLK, RL;ANDREWS, PB;LEWIS, DW
在大多数碎屑沉积物中，粒度分布和矿物组成是独立的变量。为了描述这些沉积物属性，需要进行单独的分类。当使用以下格式时，给出了基本特征：（分选项）（尺寸项）：（水泥）（突出的非碎屑）（碎屑成分）。这个多项式唤起了沉积物在脑海中的清晰形象。描述性的术语和程序是从早期的民间出版物修改的。由此形成的分类体系客观、实用。砾石、砂、粉砂和粘土是三角图的末端成员，三角图根据表面的自然分组划分为命名的纹理类别。模态大小和排序术语补充了一些类别的名称。辉长岩、砂粒岩和lutite在组成意义上用于碎屑沉积物，其结构分别由砾石（砾岩或角砾岩）、砂（砂岩）和泥（泥岩、粉砂岩或粘土岩）表示。主要的矿物或岩石碎片成分在这些组成术语之前提供明确的名称（例如，长辉石，片辉石，石英伊利石-褐铁矿）。建议用三角图来定量绘制成分数据。该分类是为现场和实验室使用而设计的。它是灵活的，因为用户可以选择适合他需要的详细描述的级别。新西兰地质学家采用这一分类将有助于汇编可比较的数据，并简化交流。
Grain-size distribution and mineralogical composition are independent variables in most detrital sediments. Separate classifications are necessary to describe these sediment attributes. Essential characteristics are given when the following format is used: (sorting term) (size term): (cement) (prominent nondetrital) (detrital composition). This polynomial evokes a clear mental image of the sediment.Descriptive nomenclature and procedure are modified from earlier Folk publications. The resultant classification system is objective and practical. Gravel, sand, silt, and clay are end members of triangular diagrams that are divided into named textural categories in accord with apparent natural groupings. Modal size and sorting terms supplement the names of some categories. Rudite, arenite, and lutite are used in a compositional sense for detrital sediments whose texture is respectively indicated by the terms gravel (conglomerate or breccia), sand (sandstone), and mud (mudstone, siltstone, or claystone). Predominant mineral or rock fragment components prefix these compositional terms to provide unequivocal names (e.g., feldsarenite, schistrudite, quartz illite-lutite). Triangular diagrams are suggested for quantitative plotting of compositional data.The classification is designed for use in the field and in the laboratory. It is flexible in that the user can select the level of detailed description applicable to his needs. Adoption of this classification by New Zealand geologists would result in compilation of comparable data and would simplify communication.