【摘要】 通过对鄂尔多斯盆地晚古生代砂岩类型、岩屑类型和重矿物组合类型的分布及其变化研究 ,将整个盆地进行了分区。这些分区之间具有相似性和继承性 ,同时与砂体展布和古流向也具有很好的一致性。整个盆地在中、早二叠世可分为五个沉积体系 : .神木 -绥德三角洲体系 ; .乌审旗 -靖边三角洲沉积体系 ; .乌海 -银川三角洲沉积体系 ; .平凉 -环县三角洲沉积体系 ; .铜川 -韩城三角洲沉积体系 ,它包括 2～ 3个小的湖泊三角洲沉积体。它们的源区分别是北部的阴山古陆、西北缘的阿拉善古陆、南部的祁连 -秦岭古陆及西南部的六盘山古陆。因此 ,陆源碎屑沉积物具有多物源供给是鄂尔多斯盆地晚古生代沉积的一个主要特点更多还原

【Abstract】 In this paper, by researching the sandstone type, the distribution and change of lithic fragment types and the distribution and change of the heavy minerals assemblage type in the Ordos Basin during the Late Paleozoic era, the authors divide the basin into several districts. These districts have the traits of semblance and inherence, and at the same time, they basically are consistent with the sandstone body distribution and the paleo current direction. According to the foregoing fact, the authors can reach the conclusion at least as follows : There are five delta sedimentary systems form early Dias to middle Dias. They are Shenmu Suide delta system, Wushengqi Jingbian delta system, Yinchuan Wuhai delta system, Pingliang Huanxian delta system and Tongchuan Hancheng delta system, respectively. Their places of origin, in turn, are Yingshan paleo land in the north, Alashan paleo land in the north west, Liupanshan paleo land in the south west, and Qilian Qingling paleo land in the south. Therefore that the terrigenous detrital materials have several places of origin is the major feature of the Paleozoic disposition of the Ordos Basin.更多还原