doi:

DOI: 10.3724/SP.J.1085.2013.00113

Advances in Polar Science 2013/24:2 PP.113-118

The content and distribution of Ge in the sediments of Prydz Bay, Antarctica


Abstract:
The content and distribution of Ge is investigated in sediments from the Southern Ocean (Prydz Bay, Antarctica). The content of Getotal in the sediments ranges from 1.14×10-6 to 2.35×10-6 (average of 1.71×10-6) and the highest value occurs at station P3-9 where water depth is > 1 000 m. The lowest value occurs at station P4-13 which is near the edge of the Amery ice shelf. The surface sediments have 16%–68% Gebio within Getotal. The distribution trends of Gebio and Getotal are generally similar, and the values outside Prydz Bay are higher than within the bay, bounded at 67°S. The vertical distribution of Ge in sediment cores pre-sents higher values at the surface than in underlying sediments. Values of Gebio appear to positively correlate with biogenic silica (BSiO2) in surface sediments from non-polynyas sea. The vertical distribution of Gebio and BSiO2 is similar in sediments of station P3-16.

Key words:Ge, sediment, Prydz Bay, Southern Ocean

ReleaseDate:2014-07-21 16:59:25



1 Zhang M, Gu X X, Fu S H, et al. A review of disperse element germanium. Bull Mineral, Petrol Geochemi, 2003, 22(1): 82-87.

2 Institute of Geochemistry, Chinese Academy of Sciences. Advanced Geochemistry. Beijing: Science Press, 1998, 38.

3 Cotton F A, Wilkinson G. Advanced inorganic chemistry. New York: Interscience, 1972: 1145.

4 Froelich P N, Hambrick G A, Andreae M O, et al. The geochemistry of inorganic germanium in natural waters. J Geophys Res, 1985, 90(C1): 1133-1141.

5 Kurtz A, Derry L, Chadwick O A. Germanium-silicon fractionation in the weathering environment. Geochim et Cosmochim Acta, 2002, 66(9): 1525-1537.

6 Street-Perrott A F, Barker P A. Biogenic silica: a neglected component of the coupled global continental biogeochemical cycles of carbon and silicon. Earth Surface Processes and Landforms, 2008, 33(9): 1436-1457.

7 Ellwood M J, Kelly M, Maher W A, et al. Germanium incorporation into sponge spicules: Development of a proxy for reconstructing inorganic germanium and silicon concentrations in seawater. Earth Planet Sci Lett, 2006, 243(3-4): 749-759.

8 DeMaster D J. The supply and accumulation of silica in the marine environment. Geochemi et Cosmochemi Acta, 1981, 45(10): 1715-1732.

9 Tregure P, Nelson D M, van Bennekom A J, et al. The silica balance in the world ocean: a reestimeate. Science, 1995, 268(5209): 375-379.

10 Tribovillard N, Bout-Roumazeilles V, Riboulleau A, et al. Transfer of germanium to marine sediments: Insights from its accumulation in radio-larites and authigenic capture under reducing conditions. Some examples through geological ages. Chemical Geol, 2011, 282(3-4): 120-130.

11 McLennan S M. Relationships between the trace element composition of sedimentary rocks and upper continental crust. Geochem Geophys Geosys, 2001, 2(4).

12 Bernstein L R. Germanium geochemistry and mineralogy. Geochemi et Cosmochemi Acta, 1985, 49(11): 2409-2422.

13 Zheng S J, Shi J X. The characteristic of sea ice growth and melt in the Prydz Bay region, Antarctica. Periodical Ocean Univ China, 2011, 41(7-8): 9-16.

14 Nelson D M, Terguer P, Brzeinski M A, et al. Production and dissolution of biogenic silica in the ocean: revised global estimates, comparison with regional data and relationship to biogenic sedimentation. Globai Biogeo-chem Cycles, 1995, 9(3): 359-372.

15 Hu C Y, Xue B, Yu P S, et al. Biogenic silica in surficial sdiments of Prydz Bay, Antarctica. Chinese J Polar Sci, 2008, 19(1): 45-53.

16 Froelich P N Jr, Andreae M O. The marine geochemistry of germanium-ekasilicon. Science, 1981, 213(4504): 205-207.

17 Jams M, Douglas E H, Kathy C, et al. Diagenetic Ge-Si fractionation in continental margin environments: Further evidence for a nonopal Ge sink. Geochimi et Cosmochimi Acta, 2003, 67(23): 4545-4557.

18 King S L, Froelich P N, Jahnke R A. Early diagenesis of germanium in sediments of the Antarctic South Atlantic: In search of the missing Ge sink. Geochimi et Cosmochim Acta, 2000, 64(8): 1375-1390.

19 Murnane R J, Lesle B, Hammand D E, et al. Germanium geochmistry in the southern California Borderlands. Geochimi et Cosmochimi Acta, 1989, 53(11): 2873-2882.

PDF