朝鲜晚奥陶世——志留纪和泥盆纪地层发现的启示

ENLIGHTENMENT FROM DISCOVERING OF STRATA OF UPPER-ORDOVICIAN TO SILURIAN AND DEVONIAN, KOREA

本文在比较系统介绍朝鲜于60-70年代发现泥盆纪临律群和晚奥陶世—志留纪地层的基础上,论证前者西延登上山东半岛,后者指向辽东、冀东的可能性。

During the period of 1960s to 1970s, the strata of Devonian (Rimjin Group) and upper-Ordovician to Silurian were discovered in Korea, which h ad a proud significance for dividing the strata occured on Sino-Korea platform. Two suites of strata were characterized by their respective lithofacies, tectonic environment and tectonic space. The thickness of two suites of strata are nearly 3000m and 500m respectively. The former represented the seidimentary environment of miogeosyncline, but the later displaied the epico-ntinental sedimentary environment of platform. The palaeogeographic and palaeotectonic extensions of Sangsori Formation ( Upper Ordovician), Kosan Formation (Lower Silurian) and woyangri Formation(Middle Silurian) developed on Pyongyang palaedeopression of korea direct to East Liaoning and East He-.bei,China, and therefore the trace of the Formations may be hidden in Majiagou Group (Middle Ordovician). According to the tectonic position, regoonal tectonic strike, lithofacies and litholog-ical characters, it is possible that the Rimjin Group, which growthed in Rimjin River fault-geosyncline zone of Korea, extends westwardly through the Huanghai Sea to Shan-gdong peninsula of China, and may correspond with 'Penglai Formation' occured on the spacial area of south Huangxian to Fushan counties and east Qixia county of China.