| 邯郸、汤阴断陷地质结构及其活动性 |
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| 引用本文： | 杨承先.邯郸、汤阴断陷地质结构及其活动性[J].地震地质,1984,6(3):59. |
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| 作者姓名： | 杨承先 |
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| 作者单位： | 国家地震局地震地质大队 |
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| 摘 要： | 根据人工地震及部分钻井资料研究,邯郸、汤阴断陷是太行山南段东麓的北北东向箕状断陷,邯郸断陷形成于早第三纪,主要受其东缘的邯东铲式正断裂控制。汤阴断陷形成于第三纪,其北部主要受东缘的汤东铲式正断裂控制,南部受东、西边缘的汤东、汤西铲式正断裂控制。两个断陷均为浅源震区,近几年来时有小震出现。邯东断裂没有明显的新活动,地震活动也较微弱,而汤阴断陷的汤东、汤西断裂,新活动明显,推测南部地震活动水平较高,是更应注意的地段
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| 关 键 词： | 汤阴 邯郸 早第三纪 活动性 上第三系 箕状断陷 地质结构 汲县 晚第三纪 淇县 |
GEOLOGICAL STRUCTURES AND THEIR ACTIVITY IN THE HANDAN AND TANGYIN GRABENS |
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| Abstract: | On the basis of seismic measurements and drilling data, the Handan and Tangyin faulted basin is of NNE direction on the eastern piedmont of Taihang Mt. The Han-dan graben was formed in Eogene, predominantly controlled by the listric normal fault along the eastern margin of the basin, while the Tangyin graben was formed in Tertiary, its northern part being controlled by the listric normal fault along the eastern margin of the basin. In the southern Tangyin basin lie the two listric normal faults on its eastern/western flank, alternatively characteristic of an intense tectonic activities in the context of geology. These three faults are of the Pre-Tertiary basement at a depth of 4000-5000 meters or more and are the continuations of the preexisting fractures.The two basins in question have their shallow hypocentral regions where small quakes have often attended in the recent past. No seismic activity has been found along the eastern Handan fault at present and one for the Handan faulted basin has been relatively in quiescence. The reverse case can be found along both the eastern fault and western fault in the Tangyin faulted basin, with the seismic activity different in the southern part and northern part of the basin. Great attention should be paid to the southern segment of the basin for its frequent activitie |
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