南极普里兹湾表层沉积物GDGTs含量分布与TEX86指标应用研究

杨峥; 于培松; 潘建明; 刘瑞娟; 韩正兵; 张海峰; 胡佶

doi:10.3969/j.issn.1001-909X.2017.01.006

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海洋学研究 ›› 2017, Vol. 35 ›› Issue (1) : 47-54. DOI: 10.3969/j.issn.1001-909X.2017.01.006

研究论文

南极普里兹湾表层沉积物GDGTs含量分布与TEX₈₆指标应用研究

杨峥^1,2, 于培松^1,2, 潘建明^*1,2, 刘瑞娟^1,2, 韩正兵^1,2, 张海峰^1,2, 胡佶^1,2

作者信息 +

Contents and distribution of GDGTs and the index application of TEX₈₆ in surface sediments of Prydz Bay, Antarctic

YANG Zheng^1,2, YU Pei-song^1,2, PAN Jian-ming^*1,2, LIU Rui-juan^1,2, HAN Zheng-bing^1,2, ZHANG Hai-feng^1,2, HU Ji^1,2

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文章历史 +

摘要

利用中国南极考察获取的沉积物样品,对普里兹湾10个表层沉积物中GDGTs的含量与分布进行分析。结果表明:普里兹湾内GDGTs含量为27.69~900.78 ng/g,其中类异戊二烯GDGTs占比94%~99%,远高于支链GDGTs。类异戊二烯GDGTs与支链GDGTs都呈现东南高、西北低的分布趋势,且与沉积物中有机碳含量显著正相关(R>0.95)。沉积物中类异戊二烯GDGTs来源于水生古菌,而支链GDGTs主要来源于沉积物中的细菌。根据GDGTs不同异构体含量计算得到的指标TEX₈₆和TEX^L₈₆都与普里兹湾1月表层海水温度呈现良好的相关性。这表明TEX₈₆和TEX^L₈₆指标在普里兹湾海域具有适用性,可以作为重建古海温的替代指标。

Abstract

The contents and distribution of glycerol dialkyl glycerol tetraethers (GDGTs) were analyzed for ten surface sediments from Prydz Bay of Antarctic. The results show that the contents of GDGTs are 27.69~900.78 ng/g with the isoprenoid GDGTs accounts for 94% ~99%, much more higher than branched GDGTs. Isoprenoid and branched GDGTs have same distribution tendency that the highest content area appears in southeast while the lowest area appears in northwest direction. Isoprenoid GDGTs and branched GDGTs both have obvious positive correlation with TOC. Analysis shows that isoprenoid GDGTs comes from marine Archaea, while branched GDGTs derives from bacteria in sediments. Compared with the WOA database, the TEX₈₆ and TEX^L₈₆ derived temperatures are consistent with the sea surface temperatures in January in the study area. This study means TEX₈₆ and TEX^L₈₆ indexes could be applied to reconstruct the paleotemperature in Prydz Bay.

导出引用

杨峥, 于培松, 潘建明, 刘瑞娟, 韩正兵, 张海峰, 胡佶. 南极普里兹湾表层沉积物GDGTs含量分布与TEX₈₆指标应用研究[J]. 海洋学研究. 2017, 35(1): 47-54 https://doi.org/10.3969/j.issn.1001-909X.2017.01.006

YANG Zheng, YU Pei-song, PAN Jian-ming, LIU Rui-juan, HAN Zheng-bing, ZHANG Hai-feng, HU Ji. Contents and distribution of GDGTs and the index application of TEX₈₆ in surface sediments of Prydz Bay, Antarctic[J]. Journal of Marine Sciences. 2017, 35(1): 47-54 https://doi.org/10.3969/j.issn.1001-909X.2017.01.006

中图分类号： P736.4+1

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