CAJ | 학술논문

基于浙江余杭北湖桥（简称BHQ）钻孔粒度相关参数和年代数据的分析，试图揭示浙江西北部地区早中全新世期间沉积环境演变的特征．结果表明：北湖草荡地区在早中全新世期间（约11363—4178 a BP），沉积物粒度组成以粉砂和粘土质粉砂互层分布为特征，粉砂组分平均含量达到71．58％，粘土组分平均值为24．13％；在气候干湿波动的背景下，早中全新世期间研究区域的沉积环境并不稳定，湖泊水位波动频繁，沉积环境经历了低湖面时期、高湖面时期及过渡时期等演化阶段．
기우절강여항북호교（간칭BHQ）찬공립도상관삼수화년대수거적분석，시도게시절강서북부지구조중전신세기간침적배경연변적특정．결과표명：북호초탕지구재조중전신세기간（약11363—4178 a BP），침적물립도조성이분사화점토질분사호층분포위특정，분사조분평균함량체도71．58％，점토조분평균치위24．13％；재기후간습파동적배경하，조중전신세기간연구구역적침적배경병불은정，호박수위파동빈번，침적배경경력료저호면시기、고호면시기급과도시기등연화계단．
The sediment of Beihuqiao drilling, located in Yuhang town of Zhejiang province, is mainly com-posed of silt and clayey silt.Based on the analysis of grain-size parameters and AMS14 C data of Beihuqiao drilling, the sediment may reveal the evolution of sedimentary environment.The results indicated that, during early-middle Holocene ( about 11363—4178 a BP ) , the average content of silt reached 71 .58%, and the clayey silt average value was about 24.13%.Under the background of the dry and wet change of climate, sed-imentary environment in Beihu Cao Dang experienced a series of changes processes with the influence of the adjacent East Tiaoxi River included high lake-level period, low lake-level period and transitional type between high lake-level and low lake-level period.