WebJan 21, 2005 · Phosphorite deposits in marine sediments are a long-term sink for an essential nutrient, phosphorus. Here we show that apatite abundance in sediments on … WebJun 21, 2013 · Here, we present the remains of modern sulfide-oxidizing bacteria that are partially encrusted in apatite, providing evidence that bacterially mediated phosphogenesis can rapidly permineralize...

Depositional sequences of the Duwi, Sibâîya and Phosphate …

WebThe formation of phosphatic sediments is coupled to global climate fluctuations, biological cycling of phosphorus and local redox conditions. Although the processes involved in phosphogenesis are well described, high-resolution data on the redox and stable isotope systematics in Recent in-situ phosphorites are scarce. WebMay 1, 2005 · Minor lithologies include volcanic ash, dolomite, porcelanite and chert, and condensed phosphatic beds. Sediments dated as 14.3–13.5 Ma have average total … northern apartments cda

Minerals Free Full-Text Geochemical Evidence of Ediacaran …

WebMar 28, 2009 · An analysis of rare earth elements in various types of supergene phosphorites established the following sequence of increasing average total contents (ppm): phosphorite from Christmas Island in the Indian Ocean, 3.89; spelean coprolitic phosphorite, 21.98; phosphorite from the weathering zone of sedimentary rocks, 27.41; … WebAn upwelling flux triggered phosphogenesis, promoting the early lithification of the sea floor on the platforms. After upwelling event neritic carbonate production could not be re-established on the Latium-Abruzzi platform because of the persisting eutrophic conditions and the high rates of tectonic subsidence and terrigenous input linked to ... WebPhosphogenesis occurs in sediments beneath some oceanic upwelling zones that harbor polyphosphate-accumulating bacteria. These bacteria are believed to concentrate … northern apartments