宿迁市晚第四纪以来孢粉组合特征及其古植被与古气候意义  

FEATURES OF PALYNOLOGICAL ASSEMBLAGES AND THEIR PALAEO-VEGETATION AND PALAEO-CLIMATE IMPLICATIONS SINCE LATE QUATERNARY IN SUQIAN CITY

作　　者：路硕[1] 陈建强[2] 王浩 LU Shuo;CHEN Jian-qiang;WANG Hao(l.Seismological Bureau of Anhui Province,Hefeiy Anhui 230031,China;China University of Geosciences,Beijing 100083,China;No.327 Unit,Bureau of geology and Mineral Exploration of Anhui Province,Hefei,Anhui 230011,China)

机构地区：[1]安徽省地震局,安徽合肥230031 [2]中国地质大学(北京),北京100083 [3]安徽省地质矿产勘查局327地质队,安徽合肥230011

出　　处：《安徽地质》2019年第3期166-170,175,共6页Geology of Anhui

摘　　要：气候变化对于植被的生长有着重要作用,因此,可以利用孢粉记录去反演古植被,讨论古气候。本文对宿迁BK2钻孔的孢粉组合分析,并结合14C和OSL测年数据,划分出5个孢粉带,其中孢粉带Ⅰ、Ⅱ反映了晚更新世早期和晚期温暖湿润和寒冷偏湿气候特征,为针叶阔叶混交林向针叶阔叶混交林-草原型过渡的植被类型;孢粉带Ⅲ、Ⅳ、Ⅴ反映了全新世气候是由温凉偏干-温暖湿润-温凉偏湿的变化过程,植被为稀疏落叶阔叶林-草原过渡类型。同时,与邻近太湖孢粉及Emiliani深海氧同位素对比表明宿迁受到冰期-间冰期影响显著。Study of palynological index of borehole section BK2 in Suqian was combined with14 C and OSL dating data to make an inverse analysis of the alternations of palaeo-vegetation and palaeo-climate since late Quaternary,indicating that the vegetation and climate in the Suqian area have mainly gone through the following stages ever since:coniferous and broadleaved mixed forest in the early time of late Pleistocene;coniferous and broad-leaved mixed forest-grassland in the late time of late Pleistocene,and the climate experienced a change from warm and humid to cold and wet;transitional vegetations from sparse deciduous broad-leaved forest to grassland were all in the early,middle and late Holocene,which reflected the change of the Holocene climate from warm-cool and a bit dry to warm and wet to warm-cool and a bit wet.The results correspond well with the sedimentary characteristics and chromatic aberration of the borehole.The climate is consistent with that revealed by the sporopollen from borehole SZ03 in the neighboring Taihu Lake area.It is indicated by comparison with Emiliani deep-sea oxygen isotopes that the Suqian area was significantly influenced by glacial and interglacial periods.

关 键 词：宿迁 晚第四纪 孢粉组合 古植被 古气候 

分 类 号：P52[天文地球—古生物学与地层学] P532[天文地球—地质学]