吉林省近期基础地质研究新进展

A new progress on the recent basic geologic research of Jilin Province

在近期区域地质调查工作中,吉林省基础地质研究取得了重大进展。其中在吉中—延边造山带地区新发现了新元古代地层及中、新元古代花岗岩;在延边开山屯地区发现了晚石炭世华夏植物群;确定了石头口门地区石炭纪细碧角斑岩系的存在;重新厘定了延边地区柯岛群的岩石地层含义及其时代属性;重新建立了白头山地区新生代火山岩系及松辽平原东缘的第四纪地层层序,并对长白山火山稳定性进行了重新评价;确认了伊通—敦化—珲春晚二叠世—早三叠世 -A型花岗岩的存在;提出了夹皮沟地区太古宙地质体为独立变质地体的新认识。

The basic geologic research of Jilin Province made an important progress. Among them the Neoproterozoic strata and Mid-Neoproterozoic granite of the central Jilin -Yianbian orogenic belt was recently discovered; the late Carboniferous Cathaysia flora was discovered in the Kaishantun area, Yianbian; it is confirmed that there was the Carboniferouos spilite in the Shitou Koumen area, redefiniting the lithostratigraphic meaning and its times-attribution; reestablishing the Cenozoic volcanic rock series in the Baitoushan area and the Quaternary succession of strata in the east margin of the Songliao plain; reevaluating the stability of the Changbaishan volcano; verifying the existing of the late Permian-early Triassic Ⅰ-A type granites in the Yitong-Dunhua-Hunchun areas. It is proposed that the Archeozoic geologic body is an independent metamorphic geologic body.