沉积学报2024，Vol.42Issue(2)：486-501,16.DOI:10.14027/j.issn.1000-0550.2022.064
山西地堑系太原盆地晚新生代沉积环境演化及物源分析
Late Cenozoic Sedimentary Environment Evolution and Provenance Analysis of Taiyuan Basin in Shanxi Graben System
摘要
Abstract
[Objective]The Shanxi Graben System has become an important area of Late Cenozoic deformation re-search in eastern China for its unique tectonic location.However,due to the limitations of the outcrop profile,com-plete sedimentary environment evolution of the basins in the graben system is rarely reported,which hinders our un-derstanding of its evolution process.[Methods]The depositional environments and provenance were analyzed using the detailed sedimentary record from the ZK01 borehole in the Taiyuan Basin.[Results and Conclusions]The analysis of the sedimentary environment shows that the Taiyuan Basin underwent a fluvial-delta/lake-river sedimenta-ry environment evolution process.Two mega transgressions generated basin-wide lakes,one at ca.5.8-4.4 and the other at ca.2.2-1.6 Ma.Provenance analysis shows that the provenance was mainly theJurassic quartz sandstones of the Taihang Mountain before 5.8 Ma.After 5.8 Ma,the provenance changed to the Triassic feldspathic sandstones,Meanwhile,the debris of metamorphic and volcanic rocks from the northern part of the Lvliang Mountain began to enter the basin,indicating the development of Fen River in the Taiyuan Basin.Asynchronous processes between paleoclimatic variations and transgressions illustrate the lakes'spreading processes as mainly influenced by tectonic subsidence,being a structural-geomorphic response to the eastward spreading of the Qinghai-Tibetan Plateau.关键词
山西地堑系/太原盆地/沉积环境/物源分析/古气候Key words
Shanxi Graben System/Taiyuan Basin/sedimentary environment/provenance analysis/paleoclimate分类
天文与地球科学引用本文复制引用
庄其天,何宏林,魏荣珠,王忠梅,石峰,闫纪元..山西地堑系太原盆地晚新生代沉积环境演化及物源分析[J].沉积学报,2024,42(2):486-501,16.基金项目
国家自然科学基金项目(41872213,U1939201,41702221,41602206) （41872213,U1939201,41702221,41602206）
中国地质科学院地质研究所项目(121201102000150012-05) （121201102000150012-05）
山西省国土资源厅地勘基金项目((HXCT01-2018F005) （(HXCT01-2018F005）
山西太原大陆裂谷动力学国家野外科学观测研究站项目(NORSTY20-04) National Natural Science Foundation of China,No.41872213,U1939201,41702221,41602206 （NORSTY20-04）
Project of Institute of Geology,Chinese Academy of Geological Sciences,No.121201102000150012-05 （）
Geological Prospecting Fund Project of Bureau of National Territory Resourc-es of Shanxi Province,No.HXCT01-2018F005 （）
Shanxi Taiyuan Continental Rift Dynamics National Observation and Research Station,No.NORS TY20-04 （）
