华北板块东缘晚古生代火山活动及其大地构造含义

在华北板块东缘，从皖北，鲁西到冀中，辽东，分布着一条长达千余ｋｍ的晚古生代北北东向火山活动带，已发现的火山岩主要为正常火山碎屑岩和沉积火山碎屑岩，岩石化学分析表明为钙碱系列中（酸）性火山岩，在华北晚古生代煤系中记录了这种强烈的火山活动，包含有丰富的火山碎屑以及由火山灰堆积蚀变而成的煤矸层（ｔｏｎｓｔｅｉｎ）。作者认为，在晚古生代，华北板块东缘可能存在一火山弧链，即华北板块东缘为一主支大陆边缘。

LATE ANDESITIC VOLCANISM OF LATE PALACOZOIC ERA ALONG THE EASTERN MARGIN OF NORTH CHINA PLATE AND ITS TECTONIC IMPLICATIONS

Late paleozgic volcanism exists along the eastern margin of the North China plate.The authorproposes the possibility that a late Paleozoic active margin exists there,which implies that the Suoth and North China Plates could collide firstly along the eastern margin of the North China blate.