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国外很多学者对灰泥丘的形成机制和时空演化等问题进行了讨论,但我国对这些问题的研究程度较低。目前灰泥丘的研究中仍存在一些问题,如灰泥的无机成因和微生物成因争论、客观分类方法的缺乏以及灰泥丘时空分布的研究精度低等。灰泥丘是以灰泥为主要成分的、正凸起的碳酸盐岩建造,可含有碳酸盐颗粒和平底晶洞构造等,但不具有格架构造。根据灰泥丘的成分分类方法,灰泥丘被分为4种类型,分别为生物碎屑灰泥丘、微生物灰泥丘、生物碎屑—微生物灰泥丘和纯灰泥丘。石炭纪—二叠纪灰泥丘的时空分布具有规律性,表现为石炭纪晚杜内期到早维宪期的Waulsortian丘或似Waulsortian丘、晚维宪期到谢尔普霍夫期的生物碎屑—微生物灰泥丘和石炭纪巴什基尔期到二叠纪萨克马尔期的藻灰泥丘。异地来源的灰泥通过无机堆积等物理作用形成正地形;微生物在灰泥丘的形成过程中不仅产生大量灰泥,而且起到重要的粘结巩固作用。
Many foreign scholars have discussed the formation mechanism and the space-time evolvement of stucco mounds. However, the research on these problems in our country is relatively low. At present, there are still some problems in the study of stucco mound, such as the controversy of inorganic genesis and microbial genesis of stucco, the lack of objective classification methods and the low accuracy of research on the spatial and temporal distribution of stucco mounds. Stucco is a stucco-dominated carbonate faulted carbonate rock that can contain carbonate particles and flat-bottomed crystal-cave structures, but without grid construction. According to the classification method of the composition of the gray mounds, the gray mounds are divided into four types, namely, biological debris mound, microbial plaster mounds, biological debris - microbial dust mounds and pure plaster mounds. The spatial and temporal distribution of the Carboniferous-Permian limestone mounds is regular, showing the Waulsortian mound or Waulsortian mound from the Late Carboniferous to the Early Verbenagegmian period, the late-grazing to Serpukhovian biological debris - Microbial Mud Mound and Algal Masonry from the Bashkir Period of the Carboniferous to the Permian Sacramentian Period. Different sources of stucco formed by the physical accumulation of inorganic and other positive terrain; microorganisms in the process of the formation of mortar not only produce a large number of stucco, but also play an important role in bonding and consolidation.