吉林省区域地质调查主要成果

吉林省1:20万区域地质调查工作于1958年以后正式开始,1983年完成;从1973年起开展1:5万区域地质调查;1981年开始区域地质调查资料的总结工作,1984年通过《中华人民共和国吉林省区域地质志》的出版审查验收。27年来,区调提高了全省基础地质研究程度,为区域成矿规律研究打下了基础,本文将重点介绍吉林区域地质方面的主要成果。一、地层方面吉林地层发育,除蓟县系、泥盆系下统、上统和中三叠统尚未发现外,自太古宙至第

ACHIEVEMENTS IN REGIONAL GEOLOGICAL SURVEYS IN JILIN PROVINCE 1958--1983

On the basis of vast amounts of actual materials obtained through regional geological surveys in Jilin province in the past 25 years,this paper deals with the basic geology of this province comprehensively,systematically and in general outline. The content includes three parts: regional stratigraphy,petrology and geological structure. The part of stratigraphy mainly introduces the advances made in the Precambrian,Cambrian,Ordovician and Me（?）ozoic of the province. The part of petrology mainly concerns the advances and current status in magmatic rocks and metamorphic rocks. Finally the tectonic framework of the whole province is discussed from the view-point of poly- cyclic tectonic activity and it is concluded that the generation,development and evolution of the Jilin geosyncline exhi bited the features of strike and lateral shifts and tail-raise in structural shifts.