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分布于宁夏贺兰山南段至香山的香山群,为早古生代贺兰拗拉槽重要物质记录,研究其沉积相和沉积环境,对宁夏大地构造背景的恢复有重要意义。通过对香山群的岩石地层特征的详细研究,对其沉积相和沉积环境进行了分析。认为香山群为一套巨厚的以浊流为主的深海浊积扇沉积,包括三个向上厚度变薄、粒度变细的退积型(海侵)的层序,显示属贺兰拗拉槽扩展时候的沉积,相组合表明扇顶位于贺兰山南段,阿拉善地块和鄂尔多斯地块为物源供给区。
The Xiangshan Group distributed to the southern Helan Mountain in Ningxia to Xiangshan is a record of the important materials of the Early Paleozoic Helan Aulao Trough. It is of great significance to study the sedimentary facies and depositional environment for the restoration of tectonic setting in Ningxia. The sedimentary facies and depositional environment of Xiangshan Group are analyzed by the detailed study of the lithostratigraphic features. It is believed that Xiangshan Group is a huge set of deep-sea turbidite fan deposits dominated by turbidity current, including three sequences of retrograde type (transgressive) with thinning upwards and thinning of grain size, When the trenches expand, the deposition and combination show that the fan roof is located in the southern section of Helan Mountain, and the Alashan and Ordos plots are the source of supply.