过程响应理论及其在湖相碳酸盐岩中的应用——以辽河西部凹陷中北部地区Es_4为例

Process-response theory and its application to the Lacustrine carbonate rocks:A case study of the Es_4 in the mid-northern part of the western sag of Liaohe depression

过程响应理论是在地球系统科学基础上提出的一种盆地沉积学研究方法,主要包括过程研究和响应研究两个方面,强调盆地演化过程对其沉积过程的控制意义。论文运用过程响应理论对辽河坳陷西部凹陷中北部地区Es4碳酸盐岩进行了研究,取得了很好的效果。研究表明,湖相碳酸盐岩的形成和分布在时间和空间上受湖盆演化过程控制明显,有利的地形和水动力条件、有利的气候和水介质条件、有利的物源和白云岩化条件,这三个关键要素,共同铸就了辽河坳陷西部凹陷中北部地区Es4湖相碳酸盐岩的沉积环境。运用过程响应理论,综合考虑碳酸盐岩沉积作用关键三要素,是建立更具指导作用和更具参考价值的湖相碳酸盐岩综合沉积模式的基础。

As a new method of basin sedimentological research, the process-response theory is based on the earth system science.This kind of method is composed of process research and response research. The controlling role of the basin evolution in the sedimentary process is emphasized in this theory. The process- response theory was successfully applied to the study of lacustrine carbonate rocks in the 4^thmember of Shahejie Formation（Es4） within the mid-northern part of the western sag of Liaohe depression.The results show that the formation and distribution of lacustrine carbonate rocks are obviously controlled by basin evolutionprocess in time and space. Based on the study of the Es4 in the mid- northern part of the western sag of Liaohe depression, the authors hold that the sedimentary environment of lacustrine carbonate rocks has three key points. The first one is the suitable topography and hydrodynamic conditions. The second one is the favorable climate and water media, and the last one is the rich provenance supply and the dolomitic conditions. The application of the process-response theory, together with the research on the three key points and the comprehensive sedimentary model of lacustrine carbonate rocks, constitutes the basis for establishing the composite sedimentary model with more reference and guidance value.