海洋通报
海洋通報
해양통보
MARINE SCIENCE BULLETIN
2009年
6期
84-89
,共6页
沉溺古树林%晚更新世%前湖湾相变
沉溺古樹林%晚更新世%前湖灣相變
침닉고수림%만경신세%전호만상변
submerged forests%later pleistocene%facies change at Qianhu Bay
根据2008年7月对从前湖湾古树林埋藏剖面和钻孔连续采集的142个样品进行粒度参数测量,分析了古树林成因和埋藏地的沉积环境变迁.用前湖湾周边已知沉积相:海滩、入海河流、河口浅滩、海岸沙丘以及滨海沼泽样本作为目标判据,将平均粒径Mz、标准偏差σ1和峰态Kg设为判别参数,与剖面和钻孔样品进行聚类判别,结果表明,42 KaBP前湖湾古树林被海湾-河口相变过程埋藏,经历了6个阶段:河口浅滩阶段、浅滩-沙丘交替阶段、浅滩-河流演变阶段、淡水沼泽阶段、海滩沙丘阶段和现代风沙阶段,是气候-环境演变导致了前湖湾沉溺古树林的埋藏.
根據2008年7月對從前湖灣古樹林埋藏剖麵和鑽孔連續採集的142箇樣品進行粒度參數測量,分析瞭古樹林成因和埋藏地的沉積環境變遷.用前湖灣週邊已知沉積相:海灘、入海河流、河口淺灘、海岸沙丘以及濱海沼澤樣本作為目標判據,將平均粒徑Mz、標準偏差σ1和峰態Kg設為判彆參數,與剖麵和鑽孔樣品進行聚類判彆,結果錶明,42 KaBP前湖灣古樹林被海灣-河口相變過程埋藏,經歷瞭6箇階段:河口淺灘階段、淺灘-沙丘交替階段、淺灘-河流縯變階段、淡水沼澤階段、海灘沙丘階段和現代風沙階段,是氣候-環境縯變導緻瞭前湖灣沉溺古樹林的埋藏.
근거2008년7월대종전호만고수림매장부면화찬공련속채집적142개양품진행립도삼수측량,분석료고수림성인화매장지적침적배경변천.용전호만주변이지침적상:해탄、입해하류、하구천탄、해안사구이급빈해소택양본작위목표판거,장평균립경Mz、표준편차σ1화봉태Kg설위판별삼수,여부면화찬공양품진행취류판별,결과표명,42 KaBP전호만고수림피해만-하구상변과정매장,경력료6개계단:하구천탄계단、천탄-사구교체계단、천탄-하류연변계단、담수소택계단、해탄사구계단화현대풍사계단,시기후-배경연변도치료전호만침닉고수림적매장.
142 samples from the section and bored hole at Qianhu Bay are collected and their grain-size parameters,mean particle size,standard deviation and kurtosis are tested in July 2008.Parameters of other specimen from beach,steam,estuarine shallow,sand dunes and freshwater swamps around the bay have also been tasted and taken as the target criterion.Cluster analysis between samples and target criterion shows that the forests were buried by bay-estuary changes.It experienced 6 stages:estuarine shallow stage,shoal - sand dunes alternating stage,shallow - rivers evolution stage,freshwater swamps stage,beaches stage and modern sand dunes stage.It is the climate-environment changes that cause the forests submerged.