地质通报2017，Vol.36Issue(9)：1625-1634,10.
雷州半岛南部湖相沉积揭示的全新世早中期气候环境演变
Early-Middle Holocene paleoenvironmental evolution revealed by a la-custrine sediment sequence in Leizhou Peninsula
摘要
Abstract
This study presents the record of paleoenvironmental evolution results from a radiocarbon-dated 1.54m-long lacustrine sediment sequence in south Leizhou Peninsula. Measurement of grain size, magnetic susceptibility (MS), total nitrogen (TN), total or-ganic carbon (TOC), atomic TOC/TN (C/N) and color reflectance values was carried out in order to reconstruct the climate span-ning the interval 10.5~6.5cal ka BP. Three distinct stages can be identified as follows: ①10.5~6.5 cal ka BP, a shallow lake level and relatively dry climate dominated this area. ②The interval from 9.5~7.2cal ka BP was characterized by a relatively high lake level and humid climate. ③During 7.2~6.5cal ka BP, lake level was relatively shallow with a relatively dry climate. Indian monsoon was more responsible for precipitation variability in this area, which was interconnected with average monthly solar radiation in summer and ITCZ migration. Red noise spectrum analysis of proxies shows centennial to millennia time scale cycles, which suggests that the envi-ronmental evolution was probably sensitive to the secular solar activity.关键词
雷州半岛/全新世早中期/环境变化Key words
Leizhou Peninsula/Early-Middle Holocene/paleoenvironmental evolution分类
天文与地球科学引用本文复制引用
汤文坤,王永,董进,田飞,刘瑾,江南..雷州半岛南部湖相沉积揭示的全新世早中期气候环境演变[J].地质通报,2017,36(9):1625-1634,10.基金项目
中国地质调查局项目《中国东部第四纪晚期地层序列与环境演变调查》(编号:121201102000150010-07) （编号:121201102000150010-07）
