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华南上石炭统船山组中普遍发育大量俗称“船山球”的核形石。这种核形石以其分布范围广、数量多、沉积厚度大和特征相似而成为地质历史上一种独特的时装相(Fasion facies)。 笔者通过对华南上石炭统44条地质剖面的实测,800多块光片、薄片的观察及适量的扫描电镜和化学分析发现,这种核形石的内部结构、构造十分复杂,并非过去所认为的属单一的“葛万藻核形石”。根据其形状和动植物的组合,可以区分出许多种类型。含核形石的沉积物主要形成于多滩(岛)的沉积环境中,但核形石也并非以前所说的仅仅出现于单一的滩相环境,它们可以出现于潮下低能带和泻湖。
In the Upper Carboniferous Chuanshan Formation in South China, a large number of core-shaped stones commonly known as “Chuanshanqiu” are widely developed. The nuclei form a unique fashion facies in the history of geology because of their wide distribution, large number, large sedimentary thickness and similar features. Through the observation of 44 geological sections of the Upper Carboniferous in South China, the observation of more than 800 light sheets and thin slices and the appropriate amount of scanning electron microscopy and chemical analysis showed that the internal structure and structure of this type of stone-shaped rock are very complicated and are not considered in the past Is a single “Ge Wan algae stone”. According to its shape and combination of flora and fauna, many types can be distinguished. Sediments that contain stone-shaped nuclei are predominantly formed in the depositional environment of many beaches (islands), but they are not just present in a single beach facies, as mentioned previously, but can occur in subtidal low-energy zones and lagoons.