地质学报2025，Vol.99Issue(12)：4071-4087,17.DOI:10.19762/j.cnki.dizhixuebao.2024371
银川地堑东缘中新生代隆升时限:来自裂变径迹的证据
Time limit of Mesozoic and Cenozoic uplift in the eastern margin of the Yinchuan Graben:Evidence from fission track dating
摘要
Abstract
The eastern margin of the Yinchuan Graben,located in the northern part of the structural belt along the western Ordos basin margin,lies at the junction of the Alxa block,Ordos block,and Qinlin-Qilian fold belt.This region has undergone multi-stage Mesozoic and Cenozoic tectonic activity.Its structural uplift is of great significance to the study of structural evolution and hydrocarbon exploration in the surrounding areas.Based on the age,length characteristics,and thermal history simulation analysis of apatite and zircon fission tracks in different areas and horizons along the eastern margin of the Yinchuan Graben,combined with structural characteristics and stratigraphic contact relationships,this paper points out that the study area has experienced at least four periods of obvious uplift:Late Jurassic(160～145 Ma),Late Cretaceous(100～70 Ma),Early Miocene(22～20 Ma),and Late Miocene(10～8 Ma).There are some differences in uplift characteristics in different periods and regions.In the Mesozoic,uplift began earlier in the northern and southern parts(Early/Middle Jurassic)and progressed gradually towards the middle part.The Late Jurassic uplift was most pronounced in the middle part,with a higher uplift rate compared to the north and south parts.In contrast,Late Cretaceous uplift was comparatively slower across the entire area.Since the Miocene,the uplift began earlier in the southern part and increased in rate northward,and the uplift rate increased northward.These spatiotemporal variations in uplift reflect corresponding geological responses and regional dynamic mechanisms.关键词
银川地堑东缘/中新生代/隆升时限/裂变径迹/晚侏罗世/地质响应Key words
the eastern edge of the Yinchuan Graben/Mesozoic and Cenozoic/uplift time limit/fission tracks/Late Jurassic/geological response引用本文复制引用
WANG Shizhe,ZHAO Hongge,LIU Chiyang,ZHANG Yicheng,WANG Jianqiang,WANG Jian,MA Biao,LI Xingchen..银川地堑东缘中新生代隆升时限:来自裂变径迹的证据[J].地质学报,2025,99(12):4071-4087,17.基金项目
本文为国家自然科学基金项目(编号42072170,42230815)资助的成果. （编号42072170,42230815）
