地质通报2023，Vol.42Issue(12)：2121-2131,11.DOI:10.12097/j.issn.1671-2552.2023.12.008
松嫩平原北部全新世黑土剖面孢粉组合及其对环境演化的制约
Palynological assemblages of Holocene typical black soil profile from northern Songnen Plain and its restricts to environmental evolution
摘要
Abstract
Paleoclimate and paleoenvironmental evolution is one of the most critical issues in the study of the formation and evolution of black soil.Reconstruction of paleo-vegetation,paleo-climate and paleo-environment,and prediction of the evolution of the climate and environment in the black soil area have become hot spots in black soil research.Fifteen sporopollen samples were collected from a typical black soil profile in the Keshan County of the northern Songnen Plain for pollen research,and total organic carbon in some soil samples from the same stratum was AMS14 C dating.Systematic analysis,identification,and research have shown that three sporo-pollen assemblages from bottom to top were developed in the black soil profile of Keshan County.The lower pollen assemblage is represented by Planted Poaceae-Echinate Asteraceae-Tamarix-Polypodiaceae,the middle pollen assemblage is represented by Tamarix-Chenopodium-Polypodiaceae-Echinate Asteraceae,and the upper pollen assemblage is represented by Pinus-Chenopodium.Comprehensive Quaternary geology and geomorphology,pollen,AMS14C,and element geochemistry analysis all suggest that the typical black soil was mainly formed in the Great Warm Period since the 7500 a B.P.of the Middle Holocene.Which formed in the warm and semi-humid climate of the Songnen Plain,the vegetation is mainly grassland vegetation with herbaceous shrubs.Neotectonic movement is the main internal driving force that controls the evolution of the natural environment in the typical black soil area.The Late Pleistocene yellow clay is the parent material of the typical black soil in the Keshan black soil area,and the development process of the black soil is the process of of soil blackening.关键词
松嫩平原北部/典型黑土/AMS14C/孢粉组合/古气候/全新世/克山县/环境地质调查工程Key words
the northern Songliao Plain/typical black soil/AMS14C/palynological assemblage/Paleoclimate/Holocene/Keshan County/environment geological survey engineering分类
天文与地球科学引用本文复制引用
刘凯,宋运红,杨凤超,戴慧敏,许江,韩晓萌,梁帅..松嫩平原北部全新世黑土剖面孢粉组合及其对环境演化的制约[J].地质通报,2023,42(12):2121-2131,11.基金项目
中国地质调查局项目《松辽平原黑土地生态地质调查》(编号:DD20221779) （编号:DD20221779）
