白云鄂博矿区位于内蒙地轴西段北缘,出露的白云鄂博群,主要由区域变质轻微的沉积岩构成,其岩性为变石英砂岩、变杂砂岩、变含砾砂岩、板岩、炭质板岩、灰岩、白云质灰岩、白云岩、泥灰岩及少量火山岩。岩相变化剧烈,地质构造复杂,后期作用强烈。该矿床发现以来,我国地质工作者在该区做了大量研究工作。特别近年来,沉积变质成矿说呼声很高,在这种认识下,要寻找该类型矿床,首要任务必然是含矿层的对比和确定。最先涉及到的当然是宽沟南北白云鄂博群分层对比问题。为此,我们在详细地质研究的基础上,根据宽沟南北实测地层剖面的地层学、岩石学、地球化学等资料,用数学地质方法 The Bayan Obo mining area is located in the northern margin of the western axis of Inner Mongolia. The exposed Bayan Obo Group is mainly composed of sedimentary rocks with slight metamorphism in the area. Its lithology is altered quartz sandstone, altered miscellaneous sandstone, altered gravel sandstone, slate, carbonaceous board Rock, limestone, dolomitic limestone, dolomite, marl and a small amount of volcanic rocks. The lithofacies change violently, the geological structure is complicated, the later period effect is intense. Since the discovery of the deposit, our country’s geological workers have done a great deal of research work in this area. Especially in recent years, depositional metamorphism mineralization is a very high voice, in this understanding, looking for this type of deposit, the first task must be the comparison and determination of ore-bearing strata. Of course, the first thing that is involved is the stratified comparison between the Bayan Group and the north-western Bayan Obo Group. Therefore, on the basis of detailed geological study, based on the stratigraphy, petrology and geochemistry data of the measured stratigraphic sections in the north and south of Kuan Gou,