CAJ | 학술논문

利用浙江省瓶窑北湖 BHQ孔长约14m的岩心，以4个 AMS 14C 数据为年代依据，对49块样品进行孢粉分析。分析结果发现，样品中孢粉浓度差异较大，植物种类繁多，总计103个科/属。通过对孢粉组合特征的分析，结合岩性特征，划分出3个孢粉带和9个亚带，重建了研究区早-中全新世植被演替和气候冷暖波动的环境序列。19～8.9m沉积时段，对应于早全新世气候回暖期，研究区植被主要是以落叶栎、松、阿丁枫和枫杨为主，混有少量常绿栎和榆等的针叶-落叶阔叶混交林，常绿乔木花粉含量较低，说明研究区经历晚更新世晚期新仙女木事件后进入全新世，气候迅速转暖；8.9～6.7m 沉积时段，对应于全新世最适宜期，为研究区水热条件配置最佳阶段，主要发育由落叶栎、常绿栎、松、阿丁枫、枫杨和榆等组成的常绿-落叶阔叶混交林，常绿乔木的种类和含量要远远高于前一阶段，指示气候变化的最适宜阶段；6.7～4.775m 沉积时段，对应于中全新世气候波动期，孢粉组合发生明显波动，研究区植被主要以落叶栎、枫香、松、枫杨等落叶阔叶乔木为主，常绿栎花粉的含量急剧萎缩，表明研究区植被类型演替为落叶阔叶林，反映经历了较为剧烈的气候恶化事件，而本段高含量的稻属花粉（≥35μm）可能指示该时段研究区存在一定规模的古人类活动。
이용절강성병요북호 BHQ공장약14m적암심，이4개 AMS 14C 수거위년대의거，대49괴양품진행포분분석。분석결과발현，양품중포분농도차이교대，식물충류번다，총계103개과/속。통과대포분조합특정적분석，결합암성특정，화분출3개포분대화9개아대，중건료연구구조-중전신세식피연체화기후랭난파동적배경서렬。19～8.9m침적시단，대응우조전신세기후회난기，연구구식피주요시이락협력、송、아정풍화풍양위주，혼유소량상록력화유등적침협-락협활협혼교림，상록교목화분함량교저，설명연구구경력만경신세만기신선녀목사건후진입전신세，기후신속전난；8.9～6.7m 침적시단，대응우전신세최괄의기，위연구구수열조건배치최가계단，주요발육유락협력、상록력、송、아정풍、풍양화유등조성적상록-락협활협혼교림，상록교목적충류화함량요원원고우전일계단，지시기후변화적최괄의계단；6.7～4.775m 침적시단，대응우중전신세기후파동기，포분조합발생명현파동，연구구식피주요이락협력、풍향、송、풍양등락협활협교목위주，상록력화분적함량급극위축，표명연구구식피류형연체위락협활협림，반영경력료교위극렬적기후악화사건，이본단고함량적도속화분（≥35μm）가능지시해시단연구구존재일정규모적고인류활동。
This research was based on a 1 4 m long core from the Borehole BHQ in Beihu Lake, Pingyao area of Zhejiang Province.With 4 dating data by AMS 14C method,palynological analysis was per-formed on 49 samples.It showed that the palynological concentrations varied greatly in different samples, and there were a wide variety of plants,i.e.,totally 1 03 pollen types were recorded.Based on characteris-tics of palynological assemblages and lithology,3 pollen zones and 9 pollen subzones were divided,and the environmental sequence of vegetation succession and climatic temperature change in the Early and Mid-dle Holocene for the study area was reconstructed.In the interval of 1 9-8.9 m,corresponding to the Early Holocene,vegetation in the study area was mainly conifer-deciduous broad-leaved forest,including Quer-cus (deciduous),Pinus,Altingiaceae and Pterocarya as well as Quercus (evergreen),Ulmus,etc. There were low content of evergreen trees,indicating that after the “Younger Dryas Event”at the late pe-riod of Late Pleistocene,the study area entered into the Holocene,and climate quickly turned warm.In the interval of 8.9~6.7m,corresponding to the Megathermal,this was the best period of hydrothermal condition in all sections.At this period,evergreen and deciduous broad-leaved mixed forest were domi-nant,including Quercus (deciduous),Quercus (evergreen),Pinus,Altingiaceae,Pterocarya and Ul-mus.And the species and quantity of evergreen trees were far more than that of the former period,indica-ting warm and humid climate.During the 6.7~4.775m sedimentary period,corresponding to the Middle Holocene,there was an apparent fluctuation in palynological assemblages,and the vegetation in the study area mainly contained deciduous broad-leaved forest such as Quercus (deciduous),Altingiaceae,Pinus and Pterocarya.The number of Quercus (evergreen) dwindled rapidly.It showed that the vegetation type in the study area had evolved into deciduous and broad-leaved forests.It reflected that the area experienced a relatively-drastical climatic deterioration event.And the high concentration of Oryza pollen (≥35μm) during this period might indicate a certain scale of ancient human activity in the study area.