长——平陆相红色盆地北东段量化沉积学特征及其演化  

Quantification Sedimentology Features and Evolution in East North segment of Chang Ping Continetal Deposit Red Basin

作　　者：章泽军[1] 

机构地区：[1]中国地质大学地学院

出　　处：《沉积学报》1998年第4期56-61,共6页Acta Sedimentologica Sinica

摘　　要：长－平陆相红色盆地北东段（系指赣西北红层分布区）由三期５个冲积扇体组成。非同期扇体分别由特定界面所分隔。山口位于盆地北侧，古流向由北向南、南东或南西呈扇形撒开；最大砾石平均体积及混杂系数在扇根处为最大值，向扇中、扇缘呈非线性递减；砾石成分严格受物源区的制约。根据量化沉积学特征及成生背景分析，该区大致经历了初始孕育期、分段剥蚀充填期及后期构造改造三大演化阶段。洪积事件始于晚白垩世、止于早第三纪始新世—渐新世。The Chang Ping continental deposit red basin consists of five alluvial fans forming different three stages. The different stages fans were separated by special bounding surfaces respectively. The fan roots were located at the north of the basin. The palaeoflow direction was fan shaped distribution. The average volume of the big gravels and mixing coefficient were biggest in the fan root, and were decreased nonlinear progessively from fan root to fringe. The material source area contyolled the composition of gravels. According to quantification sedimentology features and forming setting, it successively underwent orlginal pregnancy, denude and strong fill, three stages in the course of the Basin evolution. The proluvial events started in late Cretaceous Period and finished in Eogene Period Eocene Oligocene Epoch.

关 键 词：长-平盆地 量化沉积学 冲积扇 陆相红盆 

分 类 号：P512.2[天文地球—地质学]