Reverse Weathering in River-dominated Marginal Seas
In estuarine regions and marginal seas,reverse weathering refers to the formation of authigenic aluminosilicate and carbonate minerals promoted by large inputs of terrestrial weathering products and intense remineralization of Sedimentary Organic Carbon (SOC),which is opposite to land weathering process.Compared with the process in open ocean,the formation of authigenic aluminosilicate and carbonate minerals caused by reverse weathering in estuarine regions and marginal seas is rather rapid,playing an important role in the maintenance of ocean acidity and elements cycles.At present,there are two research methods regarding the reverse weathering process,i.e.,direct observation and chemical detection.The first method is used to study the structure and chemical composition of authigenic minerals and the second is mainly used to do quantified studies of authigenic minerals.The reverse weathering is very important to the cycles of Si,C,major ions (F-,Li+,Na+,K+,Ca2+ and Mg-2+),and alkali metal cations (Fe,Mn and Al) in marine environments,which promotes the burial of these elements in marine sediments.Due to large inputs of weathering products rich in Fe,Mn and Al oxides,precipitation of labile OC and biogenic silica,intense remineralization process and suboxic/anoxic conditions,estuarine and marginal seas are suitable sites for reverse weathering studies.The reverse weathering studies in sub-tropical and temperate estuaries should be emphasized in the future.
Marginal seasReverse weatheringFormation of authigenic mineralsAluminosilicate mineralsCarbonate minerals
NETL
NSTL
万方数据
维普
