河南理工大学学报（自然科学版）2025，Vol.44Issue(2)：51-60,10.DOI:10.16186/j.cnki.1673-9787.2023100013
华北南部济源地区三叠纪气候及其演变特征
The Triassic climate and its evolutionary characteristics in Jiyuan area in south of North China Plate:Evidence from paleosol geochemistry
摘要
Abstract
Objectives The Triassic period was a period of rapid fluctuation of greenhouse climate,and the paleosol recorded abundant paleoclimate information.To study the climate change process from extreme to medium greenhouse,Methods the Triassic paleosoils in the Jiyuan area were selected as the research ob-ject to conduct principal element analysis to quantitatively estimate the annual average precipitation and temperature,and then reconstruct the paleclimate characteristics and evolution laws of the Triassic period.Results The results showed that,(1)15 layers of paleosol(including calcareous soil,organic soil and gleyed soil)were identified in the Triassic strata in Jiyuan area.The quantitative paleoclimate reconstruc-tion results show that the mean the meanannual precipitation in the Triassic period was 447～1 557 mm/a,and the temperature was 11～23℃.In the Early Triassic,the mean annual precipitation was 447～896 mm(with an increasing trend in precipitation in the late Early Triassic),and the mean annual temperature was 16～23℃(showing a downward trendin the Middle Triassic),In the Middle Triassic,the mean annual pre-cipitation was 679～1 539 mm/a showing a steady upward trend the mean annual temperature was 11～20℃.It dropped to its lowest point in the middle of the Middle Triassic.In the Late Triassic,the mean annual precipitation was 575～1 557 mm/a.There was less rainfall in the early and late stages of the Late Triassic,and the most rainfall in the middle stage,with temperatures ranging from 17～21℃,showing a good posi-tive correlation with precipitation.(3)The climate fluctuations in the Triassic period of the North China Ba-sin were relatively common,and the Early Triassic and early Middle Triassic were generally under a back-ground of drought and heat,with a brief period of relative humidity.In the late Middle Triassic,rainfall in-creased significantly and began to shift towards a humid climate.In the Late Triassic,there was a signifi-cant fluctuation in rainfall,which was generally under a warm and humid background,accompanied by a relatively dry period.Conclusions The research results ccan provide reference for the study of the Triassic climate and its evolution laws.关键词
三叠纪/气候演变/地球化学/济源地区Key words
Triassic/climate evolution/geochemistry/Jiyuan Area分类
地质学引用本文复制引用
杨文涛,冯婉莹,张鸿禹,王敏..华北南部济源地区三叠纪气候及其演变特征[J].河南理工大学学报（自然科学版）,2025,44(2):51-60,10.基金项目
国家自然科学基金资助项目(42072123) （42072123）
河南省优秀青年基金资助项目(222300420046) （222300420046）
