长垣断陷的地壳浅部结构和构造——地震反射剖面结果
发布时间：2019-01-29 19:00
【摘要】：为研究长垣断陷的地壳浅部结构和断裂浅部构造特征,跨长垣断陷完成了一条长度49km的中深层地震反射剖面和一条长度7km的浅层地震反射剖面。根据获得的地震反射剖面,结合区域地质资料,分析研究区的地壳浅部结构和断裂活动特征。结果表明,长垣断陷是一个东深、西浅的箕状断陷;黄河断裂为西倾的铲形正断层,其浅部错断了埋深约190m的第四纪地层,其下部错断了多组反射地层和盆地基底,属第四纪以来的隐伏活动断裂;长垣断裂浅部错断了新近纪地层的底界,向下延伸至基底之下,属前第四纪断裂。本文研究成果为新乡市及其邻区的活动构造研究和地震危险性评价提供了地震学证据。
[Abstract]:In order to study the shallow crustal structure and fault shallow structural characteristics of Changyuan fault depression, a seismic reflection profile with length 49km and a shallow seismic reflection section with length 7km have been completed. According to the seismic reflection profile obtained and combined with the regional geological data, the shallow crustal structure and the characteristics of fault activity in the study area are analyzed. The results show that the Changyuan fault depression is a deep and shallow graben fault depression in the east and west. The Yellow River fault is a westward dip shovel normal fault with a shallow fault of about 190m depth of the Quaternary strata, and its lower part is a series of reflection strata and the basement of the basin, which belongs to the concealed active fault since the Quaternary. The bottom boundary of Neogene strata was faulted in the shallow part of the Changyuan fault, which extends down to the basement and belongs to the pre-Quaternary fault. The results of this paper provide seismological evidence for the study of active structures and seismic risk assessment in Xinxiang city and its adjacent areas.
【作者单位】： 中国地震局地球物理勘探中心;
【基金】：中国地震局地震行业科研专项(201108001)~~
【分类号】：P315.2
，
本文编号：2417756
[Abstract]:In order to study the shallow crustal structure and fault shallow structural characteristics of Changyuan fault depression, a seismic reflection profile with length 49km and a shallow seismic reflection section with length 7km have been completed. According to the seismic reflection profile obtained and combined with the regional geological data, the shallow crustal structure and the characteristics of fault activity in the study area are analyzed. The results show that the Changyuan fault depression is a deep and shallow graben fault depression in the east and west. The Yellow River fault is a westward dip shovel normal fault with a shallow fault of about 190m depth of the Quaternary strata, and its lower part is a series of reflection strata and the basement of the basin, which belongs to the concealed active fault since the Quaternary. The bottom boundary of Neogene strata was faulted in the shallow part of the Changyuan fault, which extends down to the basement and belongs to the pre-Quaternary fault. The results of this paper provide seismological evidence for the study of active structures and seismic risk assessment in Xinxiang city and its adjacent areas.
【作者单位】： 中国地震局地球物理勘探中心;
【基金】：中国地震局地震行业科研专项(201108001)~~
【分类号】：P315.2
，
本文编号：2417756
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2417756.html
