华北石炭纪海侵活动规律

本文根据华北区石炭系本溪组、太原组中的海相层,（虫筳）科带化石的区域分布和对比研究,并结合区域构造对石炭纪海侵的控制作用等,将石炭纪划分为早、中、晚世三个阶段,对其海侵的进退的变化规律作了详细的描述。作者认为,华北石炭纪海侵的主体方向是由东南往西北推进的,但在早石炭世—中石炭世早期的海侵,仅限于郯庐断裂以东的苏北—辽东—吉南地区,这时的海侵方向是由南往北扩展。中石炭世晚期海侵有所扩大来自苏皖北部的海水侵入到山西等地。晚石炭世时海侵面积最大,它北部抵达辽东,往南延伸到华北板块的南缘一带。

CARBONIFEROUS MARINE TRANSGRESSION IN NORTH CHINA

On the basis of the distribution and correlation of the marine beds and fusulinid fossil zones in the Caraoniferous Benxiand Taiyuan Formations in North China, combined with the controlling effects of the regional structures on the Carboniferous marine transgression. The author divides the Carboniferous into the early, middle and late epochs and describes the regularity of the changes of the transgression snd regression. The author considers that the principal direction of the Carboniferous transgression in North China was from southwest to nrthwest, but the extent of the Early to early Middle Carboniferous transgression was restricted to the northern Jiangsu-eastern Liaoning-southern Jilin area east of the Tancheng-Lujiang fault. The sea water at that time advanced from south to north. The scale of the transgression expanded somewhat by the late Middle Carboniferous. The sea water from northern Jiangsu and Anhui invaded into Shanxi and other areas and covered the largest area in the Late Carboniferous, when it extended northwards as far as eastern Liaoning and outhwards as far as the southern margin of the North China plate.