谭靖千,高苑,ABARIKE Grace Awinmalsim,宋之光

• 1:广东海洋大学化学与环境学院

摘要(Abstract)：

【目的】分析环雷州半岛近海海域表层沉积物中支链甘油二烷基甘油四醚化合物(brGDGTs)的组成、空间分布特征及来源,探讨brGDGTs相关生源环境指标的适用性。【方法】主要应用LC-MS技术对环雷州半岛近海表层沉积物中brGDGTs化合物进行分析鉴定。【结果】环雷州半岛近海海域brGDGTs组成与丰度具有明显的区域性分布特征,丰度较高的区域主要分布在环雷州半岛东北部、西北部海区,以及琼州海峡西侧,而总体上brGDGTs在西部海区的丰度高于东部海区。表层沉积物以无环和低甲基数brGDGTs化合物为主,其中以无环四甲基GDGT-Ia含量最高。【结论】环雷州半岛西北部海区存在水体自生brGDGTs化合物输入,在环雷州半岛近海表层沉积物中BIT指标具有一定物源指示作用。环雷州半岛东部海域沉积物brGDGTs的CBT-pH与半岛土壤pH数值相近,表明可利用环雷州半岛东部海域沉积物化合物环化指标CBT开展物源区古环境重建研究。MBT/CBT指标重建的温度可能反映河流流域平均气温。

关键词(KeyWords)： 海底表层沉积物;brGDGTs;组成分布;生源环境意义;环雷州半岛海域

Abstract:

Keywords:

基金项目(Foundation): 广东海洋大学博士科研启动项目（R17001）;广东海洋大学人才财政专项（002026002004）;广东海洋大学“创新强校”资助项目（Q18301）;广东海洋大学“冲一流”项目（231419029）

作者(Author): 谭靖千,高苑,ABARIKE Grace Awinmalsim,宋之光

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