Journal of Marine Sciences ›› 2017, Vol. 35 ›› Issue (1): 47-54.DOI: 10.3969/j.issn.1001-909X.2017.01.006

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

YANG Zheng1,2, YU Pei-song1,2, PAN Jian-ming*1,2, LIU Rui-juan1,2, HAN Zheng-bing1,2, ZHANG Hai-feng1,2, HU Ji1,2   

  1. 1. Laboratory of Marine Ecosystem and Biogeochemistry, SOA, Hangzhou 310012, China;
    2. Second Institute of Oceanography, SOA, Hangzhou 310012, China
  • Received:2016-04-11 Revised:2016-05-17 Online:2017-03-15 Published:2022-11-17

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 TEXL86 derived temperatures are consistent with the sea surface temperatures in January in the study area. This study means TEX86 and TEXL86 indexes could be applied to reconstruct the paleotemperature in Prydz Bay.

Key words: GDGTs, TEX86, Prydz Bay, sediments

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