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首页> 外文期刊>International Journal of Geosciences >Seismic and Tectonic Correspondence of Major Earthquake Regions in Southern Ghana with Mid-Atlantic Transform-Fracture Zones
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Seismic and Tectonic Correspondence of Major Earthquake Regions in Southern Ghana with Mid-Atlantic Transform-Fracture Zones

机译：加纳中大西洋转换断裂带南部主要地震区的地震和构造对应

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For four centuries now, southern Ghana has been known to be seismically active, and there is no clear geological explanation for the cause of the seismicity. By evaluating new field data and information with re-interpreted historical earthquake data of southern Ghana, the nature of the seismicity of southern Ghana has been elucidated. The mutual connection between the earthquake epicentres and the remote causes by Mid-Atlantic transform faults and fracture zones has been established. The seismic regions of southern Ghana have been linked separately to tectonic faults and activities of the St. Paul’s and Romanche transform-fracture zone systems offshore in the Gulf of Guinea to onshore. It is concluded that the seismicity of southern Ghana is due to tectonic activities of the St. Paul’s and Romanche transform-fracture systems. The Accra region earthquakes originate from reactivation of faults in the Romanche transform-fracture zone, and propagate onshore through Accra and environs. The Axim region earthquakes come from reactivated faults linked to the St Paul’s fracture zone, which go through southern Cote D’Ivoire to Ghana. Seismotectonic movements along the St Paul’s transform and fracture zones have quieted since 1879. But movement along the Romanche Transform fault and Fracture zone is active, causing ongoing seismicity of southern Ghana.
机译：四个世纪以来，已知加纳南部地区地震活跃，并且尚无明确的地震原因地质解释。通过使用重新解释的加纳南部地震历史数据评估新的现场数据和信息，已经阐明了加纳南部地震活动的性质。建立了中大西洋转换断层和断裂带在地震震中与遥远原因之间的相互联系。加纳南部的地震区已分别与几内亚湾近海至陆上的圣保罗和罗曼奇变换断裂带系统的构造断裂和活动联系在一起。结论是，加纳南部的地震活动是由于圣保罗和罗曼奇变换断裂系统的构造活动造成的。阿克拉地区的地震起源于罗曼奇变换断裂带断层的复活，并通过阿克拉和周围地区向陆上传播。阿克西姆（Axim）地区地震来自与圣保罗断裂带相关的重新活化断层，该断层穿过科特迪瓦南部到达加纳。自1879年以来，沿着圣保罗变换和断裂带的地震构造运动一直处于平静状态。但是，沿着罗曼奇变换断层和断裂带的地震运动活跃，导致加纳南部地区不断发生地震。

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