桓仁岩堆地貌特征与属性初探

Preliminary Research on Characteristics and Formation of Talus Landscape in Huangren,Liaoning Province

在建的田师傅-桓仁铁路途经过桓仁地区,发现一种奇特的地貌景观——岩堆。围绕岩堆地貌的特征及成因开展了野外调查,并进行了遥感解译。结果表明:岩堆属于冰缘地貌的一种类型,是古石河或石海;岩堆发育区与震旦系下统钓鱼台组地层分布区有对应关系;钓鱼台组地层岩性为厚层石英砂岩,发育节理裂隙,有利于冻融风化形成岩堆,且耐化学风化,有利于长久保留至今。桓仁岩堆的深入认识,不仅对涉及岩堆的工程建设有实际指导意义,也有助于丰富本溪国家地质公园的内容,推动特色景观的建设。

Talus,apeculiar geomorphologic landscape,is found in the Huanren section along the TianshifuHuanren Railway which is under construction.Focusing on the characteristics and formation of the talus landscape,this paper carries out field investigation and remote sensing interpretation.The results show that the talus may be an ancient stone river or block field which originates from periglacial landform.The distribution of the talus is closely related to the Diaoyutai Formation,Neoproterozoic.The Diaoyutai Formation is mainly composed of hard rocks of quartz sandstone with developed joint fissures,which benifits freezethaw weathering to form the talus.Meanwhile,quartz sandstone is resistant to chemical weathering and able to be kept for a long time until now.The research not only provides practical guiding significance for engineering construction involving talus,but also helps enrich the content of Benxi National Geological Park and promotes the construction of the characteristic landscape.