地质通报2024，Vol.43Issue(5)：766-778,13.DOI:10.12097/gbc.2023.02.049
松辽平原典型黑土区不同土壤结构的古气候背景与黑土成因机制
Paleoclimate background and genetic mechanisms of different soil structures in typical black soil areas of Songliao Plain
摘要
Abstract
The study of the genetic mechanisms of black soil is fundamental to understanding its formation and evolution,and is crucial for enhancing the protection and sustainable use of black soil.Focusing on the LZK-4 borehole in Lishu County,a representative black soil region of the Songliao Plain,paleoclimate sequences since the mid—late Pleistocene were reconstructed using clay mineralogy,elemental geochemistry,14C dating,and optically stimulated luminescence dating.This revealed the paleoclimatic contexts of various soil types and elucidated the climatic causes behind the formation of typical black soil.The findings indicated:①The typical black soil in the study area originated during the Late Holocene,with a bottom age of 2452 cal.a BP;②LZK-4 drilling unveiled a vertical structure of a black soil layer,followed by a grey-white clay layer,and then a brown-yellow clay layer,reflecting an overall trend in climate from warmth and humidity to dryness and coldness;③The typical black soil in the study area primarily formed under cold and arid conditions during the Late Holocene.This research contributes to understanding the formation and evolution of black soil in the Lishu region of the Songliao Plain,thereby providing a scientific foundation for the development,utilization,and protection of black soil resources.关键词
松辽平原/粘土矿物/元素地球化学/古气候/黑土成因/环境地质调查工程Key words
Songliao Plain/clay minerals/element geochemistry/paleoclimate/black soil origin/environment geological survey engineering分类
天文与地球科学引用本文复制引用
刘航,李瑞红,李胜荣,侯红星,秦天,高远,周业泽,李明军..松辽平原典型黑土区不同土壤结构的古气候背景与黑土成因机制[J].地质通报,2024,43(5):766-778,13.基金项目
中国地质调查局项目《辽河平原梨树地区黑土地地表基质层调查》(编号:DD20211590)和《松嫩平原西北缘阿荣旗—鄂伦春南部地区黑土地地表基质调查》(编号:DD20220857) （编号:DD20211590）
