發(fā)布時間：2019-01-29 19:00

【摘要】：為研究長垣斷陷的地殼淺部結(jié)構(gòu)和斷裂淺部構(gòu)造特征,跨長垣斷陷完成了一條長度49km的中深層地震反射剖面和一條長度7km的淺層地震反射剖面。根據(jù)獲得的地震反射剖面,結(jié)合區(qū)域地質(zhì)資料,分析研究區(qū)的地殼淺部結(jié)構(gòu)和斷裂活動特征。結(jié)果表明,長垣斷陷是一個東深、西淺的箕狀斷陷;黃河斷裂為西傾的鏟形正斷層,其淺部錯斷了埋深約190m的第四紀(jì)地層,其下部錯斷了多組反射地層和盆地基底,屬第四紀(jì)以來的隱伏活動斷裂;長垣斷裂淺部錯斷了新近紀(jì)地層的底界,向下延伸至基底之下,屬前第四紀(jì)斷裂。本文研究成果為新鄉(xiāng)市及其鄰區(qū)的活動構(gòu)造研究和地震危險性評價提供了地震學(xué)證據(jù)。
[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.
【作者單位】： 中國地震局地球物理勘探中心;
【基金】：中國地震局地震行業(yè)科研專項(201108001)~~
【分類號】：P315.2
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本文編號：2417756