利用粒度分析研判某石英砂矿矿床成因

Study and Determination of Deposit Genesis of Quartz Sand Mine by Particle Size Analysis

通过分析江西中部侏罗系石英砂矿实例,发现主要开采矿层的矿物成分主要为石英砂,次为长石及少量白云母和其他,但其固结成岩性差,成熟度较低,常以松散沉积物的形态产出。因此开采破碎后再通过简单水冲洗分选法就能获得各类级品位较好的工业级的玻璃建筑用石英砂矿及次生高岭土。本文利用维谢尔粒度分析等方法在实际地质勘查工作中详细分析了此类矿层的形成环境、矿产的成因模式以及矿床的成因分类类型等。

By analyzing the example of a Jurassic quartz sand mine in central Jiangxi,it is found that the mineral composition of the main mining seam is mainly quartz sand with poor consolidation diagenesis and low maturity in the form of loose sediments,followed by feldspar and a small amount of muscovite and others.Therefore,after mining and crushing,industrial grade quartz placer and secondary kaolin with good grade can be obtained by simple water washing and separation method.The paper analyzes the formation environment,genetic model and genetic classification of this kind of deposit in detail in the actual geological exploration by Wiechert particle size analysis method.