摘要
本文通过对泌阳凹陷东南缘下第三系红层的砾石特征、沉积结构和构造特征、基质的矿物成分、粒度特征等多方面研究，认为红层是陆表冲积扇环境中的泥石流沉积。同时指出，泥石流沉积属于近源快速沉积，沉积时遭受的物理风化作用和化学风化作用均较微弱。
After fully studied of gravel feature,sedimentary textures and structures,mineral composition and grain-size of the matrices in red beds of the Lower Tertiary in the southeasternmargin of Biyang depression,this paper suggests that the red beds is a debris flow depositsdeposited in alluvial fan environment on the land surface. During the period of its deposition,the source area was quite near and quickly deposited,and both physical and chemical weathering were all rather weak.
出处
《河南地质》
1996年第1期39-44,共6页
Henan Geology
关键词
泌阳凹陷
红层
泥石流
沉积构造
成因
下第三纪
Biyang depression, red beds, sedimentary textures and structures, grain size,debris flow
