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中国白垩纪大陆科学钻探松科1井连续取嫩江组三～五段岩心长532.07m,岩心收获率为94.8%,是迄今获取的最连续完整的沉积记录。文章对此进行了厘米级沉积地质描述(分层厚度2～5cm)。嫩三～五段沉积时期与坎潘阶中期对应。通过对松科1井嫩三～五段岩心的精细描述,揭示其岩性-岩相-旋回的沉积序列及其过程。嫩三～五段识别出9种岩石类型,发育曲流河、湖泊和三角洲3种沉积相,河道、堤岸、河漫、三角洲前缘和浅湖5种沉积亚相以及河床滞留、点砂坝、天然堤、决口扇、决口水道、河漫滩、河漫湖、河口砂坝、水下分流河道、水下天然堤、分流间湾、远砂坝、浅湖静水泥、临滨砂坝、浊流15种沉积微相。在岩相序列上共识别出9种共417个米级旋回(六级旋回),94个五级旋回,26个四级旋回,3个三级旋回。连续的组段厘米级刻画为高精度沉积过程研究提供了可能,嫩江组五段厘米级刻画识别出的陆相红层为全球白垩纪富氧事件研究提供了可能的立典剖面,嫩江组三、四段的厘米级刻画为松辽盆地黑帝庙油层的研究与开发提供了不可替代的精准地质资料。
China Cretaceous Continental Scientific Drilling Songke-1 well Nantong 3-5 consecutive take core rock core length 532.07m, core harvest rate of 94.8%, is so far obtained the most complete and complete sedimentary records. The article carried out centimeter-level sedimentary geological description (layered thickness of 2 ~ 5cm). Ten three to five depositional period corresponds to the mid-term of the Campanian. Through the detailed description of the cores of Nanshu ~ 3 in Songke-1 well, the lithology-lithofacies-cycle sedimentary sequence and its process are revealed. Nine types of rocks are identified in the third and fifth member of Nenjiang River. There are three types of sedimentary facies including meandering rivers, lakes and deltas, five sedimentary subfacies of rivers, embankments, rivers, delta front and shallow lake, , Natural dykes, rift fans, bursts, river floodplains, rivers and lakes, estuarine sand dams, underwater distributary channels, underwater natural dike, shunt bay, far sand bar, shallow lake static cement, Linbin sand dam, turbidity current 15 Sedimentary microfacies. A total of 41 kinds of 417-meter cycles (six-stage cycles), 94 fifth-stage cycles, 26 fourth-stage cycles and three third-level cycles were identified on the facies sequences. The continuous centimeter-level characterization of the section provides the possibility for the study of high-precision deposition. The terrigenous red layer identified by the centimeter level of the Nenjiang group provides a possible study of the Cretaceous oxygen enrichment events in the world. The centimeter-level characterization of the segment provides an irreplaceable accurate geological data for the research and development of the Heidimian Reservoir in the Songliao Basin.