吉林省中部晚三叠世—早侏罗世火山事件地层划分刍议

Stratigraphic division of the late Triassic-early Jurassic volcanic events of the central part of Jilin Province

根据不同比例尺的区域地质调查成果以及综合研究资料,吉林省中部早中生代火山事件地层可初步作如下划分:晚三叠大酱缸组沉积期自早而晚有:星星哨火山事件(229.5～227.5 Ma),官马火山事件(222±10)Ma,西土山火山事件(210±19)Ma;早侏罗世板石顶子组沉积期有:双丫子东山火山事件(195.04±5.01)Ma,官马金矿火山事件(193.6 Ma);早侏罗世太阳岭组沉积期有:未命名火山事件1(188.0±19.0)Ma,未命名火山事件2(184.0±1.1)Ma,北大湖火山事件(179.4±1.1)Ma,二道沟火山事件(174.0±34)Ma。

According to the different scale regional geological survey and comprehensive research data,the middle part of Jilin Province in early Mesozoic volcano event stratigraphy can be preliminarily divided as follows： Late Triassic epoch Dajianggang Formation depositional stage since the early and late are as follows： Xingxingshao volcanic event（229.5-227.5）Ma,the Guanma volcanic event（222±10） Ma,Xitushan volcanic event（210±19）Ma.Early Jurassic Banshidingzi depositional period are as follows： the Shuangyazi Dongshan volcanic event（195.04 ±5.01）Ma,the Guanma gold mine volcanic event（193.6Ma）,the Early Jurassic Taiyangling deposition period are as follows： the unnamed volcanic event 1（188.0 ±19.0） Ma,unnamed volcanic event 2（184.0±1.1） Ma,North Lake volcanic event（179,4 ±1,1） Ma,Erdaogou volcanic event（174.0 ±34）Ma.