摘要
根据江西九江永安ZK08孔中的孢粉记录,划分出7个孢粉带和10个亚带,并探讨孢粉源区约12700aBP以来的古环境演化。初步研究表明,约12700～10200aBP,经历寒冷期和温暖期,森林植被为寒温带针阔叶混交疏林、亚热带常绿阔叶林和温带落叶阔叶疏林的演化;约10200～9400aBP为孢粉缺乏带;而后约9400～8600aBP升温期以温带乔木林为主,约8600～3300aBP为大暖期,期间有2个低温期,植被以亚热带乔木林为主,约3300aBP进入新冰期,其中约3300～2100aBP的降温期以温带乔木林为主;约2100～380aBP为寒冷期,约890aBP以前为干冷,其后为湿冷,植被以山地的寒温带针阔叶混交林和温带落叶阔叶林交替变化为特征。约380aBP以来受人类活动影响,孢粉记录小冰期气候特征不明显,但约150aBP以来的气温上升显著。
On the basis of the sporopollen record in hole ZK08 in Yong'an, Jiujiang, Jiangxi, seven sporopollen zones and ten subzones are distinguished, and the paleoenvironmental evolution since ～12700 aBP in the sporopollen source area is discussed. During ～12700 to 10200 aBP the area experienced the cold stage and warm stage, when the forest vegetation was the cool temperate mixed needle leaf and broadleaf veld, subtropical evergreen broadleaf forest and temperate deciduous veld. During ～10200 to 9400 aBP the area was marked by a sporopollen-deficient zone. Later during ～9400 to 8600 aBP the temperatures rose and the area was dominated by temperate arbores. The period of ～8600 to 3300 aBP was the 'hypsithermal', when there were two cooler epochs and the vegetation was dominated by subtropical arbores. At ～3300 aBP the climate entered the neo-ice age, when the vegetation was dominated by temperate arbores in the cooling stage at ～3300 to 2100 aBP. The period of ～2100 to 380 aBP was a cold epoch, during which the climate was dry-cold before ～890 aBP and wet-cold later and the vegetation was characterized by mountainous, cool temperate, mixed needle leaf and broadleaf forest. Since ～380 aBP the climate was affected by human activities and the climatic features of the Little Ice Age recorded by sporopollen are not pronounced, but since ～150 aBP the temperatures have risen remarkably.
出处
《地质通报》
CAS
CSCD
北大核心
2005年第2期170-175,共6页
Geological Bulletin of China
基金
中国地质调查局环境地质与灾害预警项目<长江中游鄱阳湖及江西江段水患区环境地质调查评价(编号199916000114)>第四纪专题成果之一
关键词
孢粉记录
ZK08孔
孢粉带
古环境信息
江西九江
sporopollen record
hole ZK08
sporopollen zone
paleoenvironmental information
Jiujiang, Jiangxi
