Pre-Palaeogene Bedrock Distribution and Source-to-Sink System Analysis in the Shaleitian Uplift
Liu Qianghu
Zhu Xiaomin
Li Shunli
Li Huiyong
Shi Wenlong
Abstract：During the early stage of the Palaeogene,the Shaleitian uplift and its surrounding areas constituted a complete source-to-sink system.In this paper,we analysze the characteristics of Pre-Palaeogene bedrocks and sediment-dispersal patterns of the source-to-sink systems based on detritus,thin section,zircon and integrated seismic-logging data analysis.The results show that the Shaleitian uplift was filled by Archeozoic and Proterozoic metamorphic rock sediments,and Lower Palaeozoic carbonate rocks stacked with southward Mesozoic igneous rocks.The bedrocks mainly consist of Proterozoic metamorphic rocks in the southern part of eastern Shaleitian uplift,while the Lower Palaeozoic carbonate rocks in the northern part of western Shaleitian uplift.Based on the palaeogeomorphology,it is found a sand-rich area corresponds to a complete source-to-sink coupling system in the rift basin,and the stacked style and size of sandbodies in the sink are jointly controlled by the composition of bedrocks, catchment areas,sediment-transport pathways,fracture system and detritus accommodation space.It is concluded thateffective source-to-sink systems are mainly located in the southern part of the eastern Shaleitian uplift through comparative analysis of the coupling relationship among the various controls with sandbodies properties in the Shaleitian uplift and surrounding areas.
Keywords：bedrockssource-to-sink systemzircon U-Pb agesPaleogeomorphicShaleitian upliftsedimentology.
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：15( 1935-1949 )