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一、引言沉积岩的沉积区域及其氧化还原环境在许多情况下是通过粘土矿物组成而显示其特征的。因此,从湖泊-河流向海洋区域过渡时,碎屑供给的组成关系就会发生变化,譬如说,高岭石组分逐渐减少,而伊利石和蒙脱石含量则逐渐增加。在水中盐份增加的情况下,这样的分布是与根据粘土矿物的粒度和不同凝结状态对碎屑岩的划分相一致的。上述结果必定首先与潮湿的气候带有关,那儿有相应的粘土矿物共生组合出露于地表,并会被侵蚀。在其他气候带内,粘土矿物的这种划分在水平地层内留下的印记较少,或者完全不存在,所以用这种方法进行相分析势必会增加困难。
I. INTRODUCTION The depositional area of sedimentary rocks and their redox environment are in many cases characterized by clay mineral composition. As a result, the composition of debris supply changes as the lake-river flows into the ocean, for example, the kaolinite component decreases and the illite and montmorillonite contents gradually increase. In the case of increasing salinity in water, such a distribution is consistent with the delineation of clastic rocks based on the particle size of the clay minerals and the different coagulation states. The above result must first be associated with a humid climatic zone where a corresponding combination of clay minerals is exposed to the earth’s surface and can be eroded. In other climatic zones, this division of clay minerals leaves little imprint in the horizontal formation or nonexistent, so phase analysis using this method is bound to increase the difficulty.