A Review of the Stable Isotope Bio-geochemistry of the Global Silicon Cycle and Its Associated Trace Elements

Frontiers in Digital Humanities

André¹  de Souza, Gregory F.²  Michalopoulos, Panagiotis³  , Luc⁴  Leng, Melanie J.⁵  Frings, Patrick J.⁶  Dodd, Justin⁷  Cardinal, Damien⁸  Grasse, Patricia⁹  Ellwood, Michael J.^1,10  Panizzo, Virginia N.^1,11  Hendry, Katharine^1,12  Swann, George E. A.^1,13  Ehlert, Claudia^1,14  Dean, Jonathan^1,15  Sutton, Jill N.^1,16  Conley, Daniel J.^1,17 

[1] de Brest - UMR 6539 CNRS/UBO/IRD/Ifremer, LEMAR - IUEM, France;Department of Geology, Lund University, Sweden;Department of Geoscience, Swedish Museum of Natural History, Sweden;Earth Sciences Department, Royal Museum for Central Africa, Belgium;Earth Surface Geochemistry, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Germany;Geology and Environmental Geosciences, Northern Illinois University, United States;Institute of Geochemistry and Petrology, Switzerland;LOCEAN Laboratory, Sorbonne UniversitéMax Planck Research Group for Marine Isotope Geochemistry, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Germany;NERC Isotope Geosciences Facilities, British Geological Survey, United Kingdom;Ocean Circulation and Climate Dynamics, GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany;Research School of Earth and Ocean Sciences, Australian National University, Australia;School of Earth Sciences, University of Bristol, United Kingdom;School of Environmental Sciences, University of Hull, United Kingdom;Stellenbosch Institute for Advanced Study, South Africa;Universités (UPMC, Univ Paris 06), Centre National de la Recherche Scientifique, IRD, MNHN, France

关键词: Silicon;    isotope;    trace element;    biogenic silica;    biogeochemical cycles;   

DOI  :  10.3389/feart.2017.00112

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

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 of dissolved and biogenic Si; presenting case studies and discussing 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.

【 授权许可】

CC BY