On the dissolution of carbonate and silicate in the deep ocean
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Cited by (86)
Geochemical and mineralogical composition of ferromanganese precipitates from the southern Mariana arc: Evaluation, formation, and implications
2021, Chemical GeologyCitation Excerpt :The detrital aluminosilicate fractions of Fe-Mn precipitates in this study (Table 5) do not appear to favour any specific genetic type. The presence (or not) of carbonate minerals can indicate formation depth because these minerals dissolve below the carbonate compensation depth (CCD) which lies ~4500 m in the Pacific Ocean (Edmond, 1974), much deeper than any of our samples. Calcite was identified in samples (i.e., D21-2-1, D37-2-3A, D37-2-3B, D37-2-3C, D44-3-2, D75-2-7A, and D75-2-7B) that were dredged from relatively shallow formation depths of above ~1300 m (Tables 1 and 5), well above the CCD.
Manganese nodules NOD-A-1 and NOD-P-1: Implications of pre-treatment on oxygen isotopes and mineralogy
2020, Chemical GeologyCitation Excerpt :The carbonate compensation depth (CCD) varies depending on latitude and other factors, but generally can be placed at approximately 5500 m and 4500 m in the Atlantic and Pacific oceans, respectively (Boudreau et al., 2018; Edmond, 1974). This places NOD-A-1– 4700 m above, and NOD-P-1– 150 m above the CCD (Boudreau et al., 2018; Edmond, 1974). Both NOD-A-1 and NOD-P-1 reacted visibly during the acidification process, however NOD-A-1 reacted to a much greater degree, consistent with their respective positions above the CCD.
Calcite dissolution kinetics at the sediment-water interface in natural seawater
2017, Marine ChemistryCitation Excerpt :The position of the CCD is determined by the balance between the flux of particulate CaCO3 from the overlying water and the ambient calcite dissolution rate (Berner et al., 1976; Boudreau et al., 2010; Edmond, 1974; Edmond and Gieskes, 1970; Morse and Berner, 1972). In other words, the CCD is the depth below which seawater undersaturation is sufficient to generate a seafloor dissolution rate that is equivalent or faster than the CaCO3 particulate flux (Edmond, 1974), thus preventing accumulation. Additional calcite dissolution caused by anthropogenic acidification will occur over the area of the seafloor located between the rising CCD and calcite saturation depth.
Vertical distribution of <sup>236</sup>U in the North Pacific Ocean
2017, Journal of Environmental RadioactivityCitation Excerpt :However, sinking particles might be dissolved at the conditions at great depths. The solubility of carbonate and silicate increases at low temperatures and high pressures (Edmond, 1974). The depth at which carbonate dissolves is known as calcite-compensation depth (CCD) and can be situated at about 4000 m for this area of the North Pacific Ocean (Chen et al., 1988).
Geological and biological heterogeneity of the Aleutian margin (1965-4822 m)
2009, Progress in Oceanography