Mangrove Lake, Bermuda

Knicker, H., and Hatcher, P. G. (2001). Sequestration of organic nitrogen in the sapropel from Mangrove Lake, Bermuda. Org. Geochem. 32, 733-744. 

Figure 6.11. A. Saturation state of seawater with respect to aragonite as a function of sulfate reduction. Based on general model of Ben-Yaakov (1973), updated by using pK a values and total ion activity coefficients of Millero (1982). B. Observed saturation state of Mangrove Lake, Bermuda pore waters with respect to calcite.

Orem, W.H., Hatcher, P.G, and Spiker, E.C. (1986) Dissolved organic matter in anoxic pore waters from Mangrove Lake, Bermuda. Geochim. Cosmochim. Acta 50, 609-618. 

Canfield D. E., Boudreau B. P., Mucci A., and Gundersen J. K. (1998) The early diagenetic formation of organic sulfur in the sediments of Mangrove Lake, Bermuda. Geochim. Cosmochim. Acta 62(5), 767-781. 

FIGURE 2. NMR spectra of humin isolated from various depth intervals in cores from two peats. The Everglades peat was collected from a sawgrass area in Conservation District lA west of Fort Lauderdale, Florida. The peat core from Mangrove Lake, Bermuda, was collected and described by Hatcher (1978). 

FIGURE 6. C NMR spectra of samples of whole sapropel, humin, and hydrolyzed humin from a core of Mangrove Lake, Bermuda. The whole sapropels are from a core collected in 1982. The humin was from a core collected in 1971 (Hatcher, 1978) and is characteristic of humin from all depths in the sapropel. 

FIGURE 9. C NMR spectra of algal kero-gens and boghead coals from locations described by Hatcher (1980). The spectrum of humin from Mangrove Lake, Bermuda, is also shown. 

The similarity between the various spectra in Figure 9 should be underscored because such spectral similarities reinforce arguments concerning the origin and formation of algal kerogen. In many respects, the spectrum of the Miocene sapropelic coal is nearly identical to that of humin from Mangrove Lake, Bermuda. The only differences appear to be in the relative amounts of... 

Figure 5. Electronic absorption spectra, (a) bacteriopheo-phytin-a(so1id) and the dioxy-dideoxo derivative (dashed) obtained following reduction with sodium borohydride and (b) the crude extract of Mangrove Lake (Bermuda) sapropel.

Humic isolates from different layers of an organic matter rich algal sapropel from Mangrove Lake, Bermuda, have been analyzed using solid-state N NMR in order to reveal chemical structural interrelationships that allow delineation of diagenetic pathways. ... 

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