第四纪火山区活动构造的识别和地震危险性评价

ACTIVE TECTONIC DISTINCTION AND SEISMIC RISK EVALUATION IN QUATERNARY VOLCANIC REGION

在第四纪火山区作活动构造研究时需要仔细地区分岩浆原生构造、火山区非构造变动和真正的活动断裂。第四纪火山区晚更新世晚期以来不再活动的断裂不宜看成危险性断裂。第四纪火山区可能发生中强地震，极少可能发生大地震。

Care should be taken to distinguish the real active structures from original magma structures and non -geotectonic deformation during studying active structure in the region of Quatemary volcano. In that region, the fault which has not been reactive since the end of late Peistocenc should not be evaluated as seismogenic risk fault; it is possible to occur moderate earthquakes, but impossible the to occur destructive earthquakes with magnitude≥7.