鲁中南地区古近纪含石膏盆地地质特征及矿石质量的差异

山东省石膏矿产出层位较多,目前,开发利用的石膏矿均为发育在鲁中南隆起区(鲁西山地丘陵区)的古近纪含膏盆地内,即汶口-汶东含膏盆地、泗水含膏盆地、平邑含膏盆地及底阁含膏盆地内,含膏盆地内矿体主要赋存于古近纪官庄群大汶口组中段及卞桥组等含膏岩系内,各含膏盆地因分布形态原始地貌及沉积旋回中各种因素的影响,矿石质量出现明显差异,由此推断出石膏矿石质量与盆地的分布特征及地质特征具有密切联系。根据含膏盆地特征可以预测含矿层的矿石质量,以指导勘查工作布署的合理实施。

Geological Characteristics and Difference between Ore Qualities in Paleogene Gypsum-bearing Basins in Middle and South Areas in Shandong Province

Occurrence layers of gypsum deposit are rather rich in Shandong province.At present,gypsum deposits which can be explored and utilized mainly developed in Paleogene gypsum-bearing basins in uplift areas in middle and south part of Shandong province.They are Wenkou-Wendong gypsum-bearing basin,Sishui gypsum-bearing basin,Pingyi gypsum-bearing basin and Dige gypsum-bearing basin.Orebodies mainly occurred in gypsum-bearing layers in middle part of Dawenkou formation and Bianqiao formation in Paleogene Guanzhuang group.Due to effects of original landscape and sedimentary circles,ore quality has obvious difference.Thus,it is concluded that gypsum ore quality has close relation with distribution characteristics and geological characteristics of basin.According to characteristics of gypsum-bearing basins,ore quality in all layers can be predicated,which can guide work arrangement reasonably.