白音查干凹陷桑合地区下白垩统都红木组沉积体系研究的开题报告.docx

白音查干凹陷桑合地区下白垩统都红木组沉积体系研究的开题报告 【摘要】 本文以内蒙古白音查干凹陷桑合地区下白垩统都红木组沉积体系为研究对象，结合地质、地球物理及岩心资料，通过对岩石物性、岩心显微组构、岩心古生物及岩石化学特征等方面的研究，旨在深入探讨该区域下白垩统都红木组沉积体系的演化及其控制因素。 该区域下白垩统都红木组主要沉积类型为三角洲前缘河道相和三角洲平原相，其中三角洲前缘河道相为优势相。研究表明，该沉积体系的演化主要受到区域构造演化、气候变化和海平面变化等因素的控制。通过对研究区域的岩心样品进行分析，发现在高地沉积物质输入减少的情况下，三角洲前缘河道相向三角洲平原相转换明显，反映了该区域的构造活动性随时间的变化，且三角洲沉积主要受到全球海平面变化的影响。 本研究对于认识内蒙古白音查干凹陷桑合地区下白垩统都红木组沉积体系的演化规律，揭示该区域沉积控制因素具有重要意义。 【关键词】内蒙古；白音查干凹陷；都红木组；沉积体系；控制因素 【Abstract】 This paper takes the sedimentary system of the Lower Cretaceous Du Hongmu Formation in the Sanghe area of the Baiyinchagan sag in Inner Mongolia as the research object, and combines geological, geophysical and core data to explore the evolution and controlling factors of the sedimentary system of the Du Hongmu Formation in the study area through the study of rock physics, core microstructure, micropaleontology and petrochemical characteristics. The main sedimentary types of the Du Hongmu Formation in this area are delta front channel facies and delta plain facies, among which delta front channel facies is dominant. The study shows that the evolution of the sedimentary system is mainly controlled by regional tectonic evolution, climate change and sea level change. Through the analysis of core samples in the study area, it is found that under the condition of reduced sedimentary input from highlands, the transition from delta front channel facies to delta plain facies is obvious, reflecting the change in tectonic activity in this area over time, and the sedimentation of the delta is mainly affected by global sea level change. This study is of great significance to understanding the evolution law of the sedimentary system of the Du Hongmu Formation in the Sanghe area of the Baiyinchagan sag in Inner Mongolia and revealing the controlling factors of sedimentation in this area. 【Keywords】Inner Mongolia; Baiyinchagan sag; Du Hongmu Formation; sedimentary system; controlling factors