摘要
本次区调在1∶25万岔路口幅向阳峰一带地质填图和实测地层剖面中,在原划中泥盆统落石沟组中采到了大量腕足、珊瑚类化石,经鉴定其形成时代为早石炭世中期。该套地层与西邻《神仙湾》幅区域地层对比,厘定为早石炭世帕斯群。该生物化石的取得,为该套地层时代划分提供了依据,填补了岔路口地区缺失早石炭世地层的空白,为进一步详细研究甜水海微陆块地层层序格架及地层演化,提供了新的基础资料。
During geological mapping and surveying at a scale of 1 ： 250, 000 in the Xiangyangfeng area within the Chalukou quadrangle map, a lot of fossils of Brachiopoda and corals have been discovered from the original Middle Devonian Luoshigou Formation. Those fossils have been dated to the metaphase of the Early Carboniferous epoch. The strata, from which the fossils are discovered, are defined into the Early Carboniferous Parsi Group by correlation to the Shenxianwan quadrangle map at the west. The discovery of the fossil species has provided evidence for division of the time-stratigraphic units and basic information for detailed research of the framework and evolution of stratigraphie sequence in microcontinent with fresh-water, which fills the gap of the deficiency of the Early Carboniferous strata in Chalukou area.
出处
《陕西地质》
2009年第1期37-42,共6页
Geology of Shaanxi
基金
中国地质调查局1:25万康西瓦
岔路口等四幅地质调查项目(编码:200313000003)
关键词
甜水海微陆块
岔路口地区
珊瑚化石
早石炭世
microcontinent with fresh water
Chalukou area
coral fossil
Early Carboniferous epoch
