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据层序地层、事件地层、生物地层和岩石地层研究.腮林忽洞群是白云鄂博群的一部分。于腮林忽洞群下部层位的岩石切片中首次发现三叶虫屑,并首次分离出奥陶系疑源类及几丁虫化石;于上部层位首次识别出碳酸盐震积岩组及顶部巨型微晶丘(micrite mound)。白云鄂博超大型铌稀土铁矿赋矿白云岩既非火成碳酸岩,也非一般层状沉积岩,而是一巨型微晶丘,与腮林忽洞群顶部微晶丘白云岩宏观特征一致,并可能属同一层位。根据已有的化石材料,腮林忽洞群与白云鄂博群应为下古生界而非中元古界。本文的新发现与新认识将对白云鄂博超大型矿床的成因解释提供新的思路。并有可能在其以南地区发现新的同类型矿床。
According to the sequence stratigraphy, event stratigraphy, biostratigraphy and lithostratigraphic research, the Qilin Lintong group is part of the Bayan Obo group. For the first time, trilobite was found in the rock slices of the lower layer of the Kettering Hutong Group and the Ordovician source rocks and chitin fossils were isolated for the first time. For the first time, the carbonate seismites And the top micrite mound. The dolomite of the Bayan Obo superlarge niobium rare earth iron ore is neither an igneous carbonate nor a general layered sedimentary rock but a giant microcrystalline mound which is consistent with the macroscopic characteristics of the microcrystalline mound at the top of the turtle forest. And may belong to the same level. According to the existing fossil materials, the Kailin group and the Bayan Obo group should be the Lower Paleozoic rather than the Proterozoic. The new findings and new understanding of this article will provide new ideas for the genesis explanation of the ultra-large deposits in the Bayan Obo. It is also possible to find new deposits of the same type in the south of the country.