A Review of the Stable Isotope Bio-geochemistry of the Global Silicon Cycle and Its Associated Trace Elements
|Author(s)||Sutton Jill N.1, Andre Luc2, Cardinal Damien3, Conley Daniel J.4, 5, De Souza Gregory F.6, Dean Jonathan7, 8, Dodd Justin9, Ehlert Claudia10, Ellwood Michael J.11, Frings Patrick J.12, 13, Grasse Patricia14, Hendry Katharine15, Leng Melanie J.8, 16, Michalopoulos Panagiotis17, Panizzo Virginia N.16, 18, Swann George E. A.16, 18|
|Affiliation(s)||1 : Univ Brest, LEMAR IUEM, IFREMER, UBO,IRD,CNRS,UMR 6539, Plouzane, France.
2 : Royal Museum Cent Africa, Dept Earth Sci, Tervuren, Belgium.
3 : Univ Paris 06, Sorbonne Univ, LOCEAN Lab, CNRS,IRD,MNHN, Paris, France.
4 : Lund Univ, Dept Geol, Lund, Sweden.
5 : Stellenbosch Inst Adv Study, Stellenbosch, South Africa.
6 : ETH, Inst Geochem & Petrol, Zurich, Switzerland.
7 : Univ Hull, Sch Environm Sci, Kingston Upon Hull, N Humberside, England.
8 : British Geol Survey, NERC Isotope Geosci Facil, Nottingham, England.
9 : Northern Illinois Univ, Geol & Environm Geosci, De Kalb, IL USA.
10 : Carl von Ossietzky Univ Oldenburg, Max Planck Res Grp Marine Isotope Geochem, Inst Chem & Biol Marine Environm, Oldenburg, Germany.
11 : Australian Natl Univ, Res Sch Earth & Ocean Sci, Canberra, ACT, Australia.
12 : GFZ German Res Ctr Geosci, Earth Surface Geochem, Helmholtz Ctr Potsdam, Potsdam, Germany.
13 : Swedish Museum Nat Hist, Dept Geosci, Stockholm, Sweden.
14 : GEOMAR Helmholtz Ctr Ocean Res Kiel, Ocean Circulat & Climate Dynam, Kiel, Germany.
15 : Univ Bristol, Sch Earth Sci, Bristol, Avon, England.
16 : Univ Nottingham, Ctr Environm Geochem, Nottingham, England.
17 : Hellen Ctr Marine Res, Inst Oceanog, Anavyssos, Greece.
18 : Univ Nottingham, Sch Geog, Nottingham, England.
|Source||Frontiers In Earth Science (2296-6463) (Frontiers Media Sa), 2018-01 , Vol. 5 , N. 112 , P. 24p.|
|WOS© Times Cited||3|
|Keyword(s)||C - N - O - Si isotopes, biogenic silica, element/Si ratios, biogeochemical cycles, silicon|
Silicon (Si) is the second most abundant element in the Earth's crust and is an important nutrient in the ocean. The global Si cycle plays a critical role in regulating primary productivity and carbon cycling on the continents and in the oceans. Development of the analytical tools used to study the sources, sinks, and fluxes of the global Si cycle (e.g., elemental and stable isotope ratio data for Ge, Si, Zn, etc.) have recently led to major advances in our understanding of the mechanisms and processes that constrain the cycling of Si in the modern environment and in the past. Here, we provide background on the geochemical tools that are available for studying the Si cycle and highlight our current understanding of the marine, freshwater and terrestrial systems. We place emphasis on the geochemistry (e.g., Al/Si, Ge/Si, Zn/Si, delta C-13, delta N-15, delta O-18, delta Si-30) of dissolved and biogenic Si, present case studies, such as the Silicic Acid Leakage Hypothesis, and discuss challenges associated with the development of these environmental proxies for the global Si cycle. We also discuss how each system within the global Si cycle might change over time (i.e., sources, sinks, and processes) and the potential technical and conceptual limitations that need to be considered for future studies.