期刊论文

中文

华中师范大学学报(自然科学版)

1000-1190

2017

51

5

680-689

10.19603/j.cnki.1000-1190.2017.05.020

国家自然科学基金项目（41471041）； 湖北省自然科学基金项目（2015CFB704）； 区域开发与环境响应湖北省重点实验室开放基金项目（2015（C）004）；

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以鄂西七姊妹山泥炭藓湿地QZMS钻孔沉积物为研究对象,通过AMS14C测年、岩性特征与沉积物粒度综合分析,探讨了鄂西南山地13 000 cal.a BP以来的沉积环境变迁.研究结果显示:QZMS钻孔沉积物粒度组成主要以细粉砂和中粉砂为主,频率分布曲线均为单峰分布,由下至上,峰度由宽到窄,偏度从近于对称到正偏,揭示了搬运动力和沉积环境的演变过程;综合分析结果表明研究区沉积环境演化可分为4个阶段:1)12.9～11.6 cal.ka BP,气候波动频率高,但幅度较小,水动力条件相对较弱;2)11.6～10.2 cal.ka BP为晚更新世向全新世的过渡阶段,水动力条件持续较弱,环境相对稳定;3)10.2～7.7 ca1.ka BP早全新世,气候变得暖湿,水...

Taking the QZMS core sediments of Sphagnum wetlands at Qizimei Mountains in Western Hubei Province as the research object, the climate change of southwest mountainous region of Hubei since 13 000 cal. a BP is discussed through the comprehensive analysis of AMS14C dating, lithologic characteristics and grain-size of the sediments. The research has shown that the grain composition of QZMS core sediments are mainly composed of fine silt and silt. The frequency distribution curves are unimodal, and from bottom to top, the kurtosis is from wide to n...