松辽盆地中南部及其邻区新构造运动与铀成矿

Neotectonic movement and its relation to uranium metallogenesis in central-southern Songliao basin and its adjacent areas

松辽盆地中南部及其邻区位于滨太平洋新构造域的内蒙 东北新构造区南部。晚第三纪以来 ,本区新构造运动比较强烈 ,最显著的特征是断块大幅度升降运动和强烈的火山活动。新构造所形成的巨型盆岭构造及其它微地貌为可地浸砂岩型铀矿成矿创造了有利的地质构造和地貌条件。新构造运动在铀成矿过程中发挥了积极作用 ,也产生了一些负面影响。松辽盆地东部和南部的盆缘区新构造发育 ,控矿明显 。

The central-southern Songliao basin and its adjacent area are located in the south of Inner Mongolian-Northeastern China neotectonic region of the circum-pacific neotectonic domain.Since Late Tertiary the neotectonic movement in the region has been being more intense,and the most obvious feature of the neotectonic movement was characterized by large-amplitude block-faulting and strong volcanic activity.The mega-scale basin-and-range tectonics and other micro-geomorphology created favourable tectonic and geomorphologic conditions for the ore-formation of in-situ leachable sandstone-type uranium deposits.Neotectonic movement played both positive and negative roles in uranium ore-formation.Neotectonics are well devoloped at the eastern and the southern margins of the Songliao basin,and these areas are favourable for locating in-situ leachable sandstone-type uranium deposits.