陕西府谷高岭土矿沉积环境与成矿关系研究

Study on the Relationship between the Depositional Environment and Minerallization of Fugu Kaolinite Deposit in Shanxi Province

通过对高岭土矿及含矿沉积环境分析,认为府谷地区沉积型硬质高岭土矿分别形成于海岸后受淡水控制的湖泊、三角洲分流间湖泊、三角洲平原湖泊和曲流河岸后湖泊等。不同沉积环境其矿体特征、矿石类型及工业用途不同。海岸后受淡水控制的湖泊、三角洲分流间湖泊型沉积高岭土矿规模巨大,分布范围广,但高岭石含量低,杂质含量高,质量较差,工业用途受限用于制瓷业。而三角洲平原湖泊和曲流河岸后湖泊型矿床规模较前者小些,但高岭石含量高,杂质含量低,质量好,用于造纸、涂布原料及分子筛等。该项研究成果对高岭土矿勘查及其工业利用有所帮助。

Analysis of the kaolinite deposit and its ore--deposition environment shows that the areas of Fugu hard sedimentary kaolinite deposits were formed respectively in the lake controlled by freshwater behind the coast, the lake between distributary channels, delta plain lakes and medering riparian lakes. Deposits formed in different sedimentary environments varies in orebody characteristics, ore types and industrial uses. The Deposits formed in the lake controlled by freshwater behind the coast and lake between distributary channels have a large scale and a wide distribution, however, because of the low kaolinite content, high impurity content, and poor quality of the kaolinite, their industrial uses were limited in Porcelain Manufacture. In contrast, the deposits formed in delta plain lakes and meandering riparian lakes are relatively smaller, whereas due to high kaolinite content, low impurity content, and good quality, this kind of kaolinite has many advanced industrial applications, such as paper coating and molecular sieve. The research is helpful to the exploration and industrial utilization of kaolinite deposit.