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在祁连山中段的山间盆地中,堆积了较厚的第四纪松散沉积物,并伴生有砂金、砂铂和自然硫等矿产。本文拟从新构造运动、冰川活动、地貌及第四纪松散沉积的特征等方面,对本区第四纪地层层序及矿产的赋存规律进行初步探讨,不妥之处,请指正。一、新构造运动特征祁连山在地史上是一个从下古生代到新生代一直在活动着的构造单元。在第四纪初期表现得相当活跃,形成了区内新构造运动、地貌、第四纪松散沉积物等的独特性。例如在牙马图上游的黑虎峡,石炭一二叠纪地层逆掩于第四系萨拉河砾岩之上,断层方向为北北西,倾
In the middle of the Qilian Mountains, there are thick Quaternary loose sediments accumulated in the mountain basins along with the deposits of placer gold, platinized platinum and natural sulfur. This paper intends to discuss the sequence of Quaternary stratigraphy and the law of occurrence of the mineral in terms of neotectonic movement, glacial activity, landform and the characteristics of Quaternary loose sediments. A new tectonic movement Qilian Mountains in the history of the earth is a from the Paleozoic to Cenozoic has been active tectonic units. In the early Quaternary period quite active, forming a new tectonic movement, geomorphology, Quaternary loose sediment unique. For example, in the Black Tiger Gorge upstream of the tooth map, the Permian-Permian strata overrides the Quaternary Sara conglomerate, and the fault direction is North,