松辽盆地中央坳陷区晚白垩世嫩江组层序结构与沉降速率的耦合分析  

Coupling analysis between sequence structure and subsidence rates of Late Cretaceous Nenjiang Formation in central depression area of Songliao Basin

作　　者：赵健[1] 方石[1,2] 张新荣 李军辉[3] 付秀丽 白月[3] ZHAO Jian;FANG Shi;ZHANG Xinrong;LI Junhui;FU Xiuli;BAI Yue(College of Earth Sciences,Jilin University,Changchun 130061,China;Jilin Provincial Key Laboratory of Oil Shale and Co-generated Energy Minerals,Changchun 130061,China;Research Institute of Exploration and Development,Daqing Oilfield Co.,Ltd.,Daqing 163712,Heilongjiang,China)

机构地区：[1]吉林大学地球科学学院,长春130061 [2]油页岩与共生能源矿产吉林省重点实验室,长春130061 [3]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《世界地质》2023年第2期245-255,共11页World Geology

基　　金：国家自然科学基金项目(41472173)。

摘　　要：为进一步揭示松辽盆地白垩纪的构造演化背景,推断构造沉降是否为嫩江组时期的沉积体系演化的控制因素,笔者利用钻井、测井资料,开展了沉积相、层序结构、米兰科维奇旋回以及埋藏史分析,定量分析了构造沉降与沉积演化、层序结构之间的关系。结果表明:嫩江组有3个三级层序,层序Ⅰ(嫩一、二、三段)发育TST、HST和RST,层序Ⅱ(嫩四段)和层序Ⅲ(嫩五段)发育完整的LST、TST、HST和RST;嫩江组存在16个405 kyr,时限从77.43 Ma到83.98 Ma,持续6.55 Ma;嫩江组沉降速率逐渐减小;嫩江组沉积演化和层序结构的主控制因素不是单一的构造沉降。To further reveal the tectonic evolution of Cretaceous in Songliao Basin and determine whether the tectonic subsidence was the controlling factor in the evolution of the sedimentary system for the Nenjiang Formation,the authors have conducted analyses of sedimentary facies,sequence stratigraphy,Milankovitch cycles and burial history by drilling and logging data.Meanwhile,the relationship between tectonic subsidence and sedimentary evolution and sequence stratigraphy has been analyzed quantitatively.The results showed that the Nenjiang Formation had three third-order sequences:Sequence I(1st,2nd,and 3rd sections of Nenjiang Formation)developed TST,HST,and RST,while Sequence II(4th section of Nenjiang Formation)and III(5th section of Nenjiang Formation)developed complete LST,TST,HST,and RST.The Nenjiang Formation was composed of sixteen 405 kyr,ranging from 77.43 Ma to 83.98 Ma,lasting 6.55 Ma.The subsidence rates of Nenjiang Formation decreased gradually with time,and the main controlling factors of the sedimentary evolution and sequence structure of Nenjiang Formation were not the sole tectonic subsidence.

关 键 词：沉积演化 层序结构 米兰科维奇旋回 沉降速率 控制因素 

分 类 号：P548[天文地球—构造地质学]