关于敦化—安图一带的“砂板岩夹大理岩”地层时代的重新厘定及万宝岩组的建立  

The redetermination of stratigraphic time of “sand-slate with marble” in the Dunhua-Antu area and the establishment of the Wanbao Formation

作　　者：陈跃军[1] 路孝平[1] 纪春华[1] 潘健 

机构地区：[1]吉林省地勘局区域地质矿产调查所,吉林长春130022

出　　处：《吉林地质》2000年第3期1-5,77,共6页Jilin Geology

摘　　要：吉林省敦化—安图一带的“砂板岩夹大理岩”前人曾将其置于二叠纪“庙岭组” ,寒武—奥陶纪“黄莺屯组”。但均缺少相关的生物资料及测年数据 ,所依靠的仅是岩石组合特征的区域对比。本次 1∶5万区域地质调查① ,在万宝一带 (大甸子幅 )的砂板岩中发现了微古植物化石 ,经地科院地质所高林志同志鉴定计有 :Lophosphaeridiumsp ,Leiominucu lasp ,Leiopsophosphaelasolidasinetliu ,其时代为前寒武纪。这些微古植物的发现 ,为该区的“砂板岩夹大理岩”地层之时代重新厘定找到了直接的生物依据。鉴于该套地层岩石组合特征清楚 ,时代依据充分 ,在区域上具有一定的延展性和可填图性 ,故将其重新命名为万宝岩组。这个岩组的建立对吉黑地区的新元古代地层之划分、对比具有重要的意义。The “sand slate with marble” in the Dunhua-Antu area,Jilin province is referred by the formers to the Permian Miaoling Formation and Cambrian-Ordovician Huangyingtun Formation.The relative biogenic data and dating data are not enough.It only depends on the regional correlation of rock association characteristics.In the recent geological investigation (1∶ 50 000), the microplaeo-plant fossils were discovered in “sand slate” of the Wanbao area (Dadianzi sheet) and distingnished by Gao Lin?zhi,Institute of Geological Science,Academy of Geoscience,they are Lophosphaeridium sp., Leiiominucula sp., Leiopsophosphaela solida sinetliu which age is PreCambrian.The discovery is a direct biogenic basis for redetermining the stratigraphical time of “sand slate with marble” in the study area.Because of the obvious rock association and time characteristics,it has a certain extension and mapability.So,it is renamed as the Wanbao Formation,having an important significance for the Neoproterozoic stratigraphic division and correlation in Jilin-Heilongjiang province.

关 键 词：微古植物 万宝岩组 地层时代 新元古代 

分 类 号：P534.3[天文地球—古生物学与地层学]