Publication Date:
2023-04-24
Description:
Phosphatized biogenic limestones and phosphorites with initial Fe-Mn mineralization dredged from the summit surface of the Kammu Seamount (Milwaukee Seamounts, northwestern Pacific) are studied. The rocks are largely composed of nannofossils and planktonic foraminifers with an admixture of benthic foraminifers, bryozoans, and other organic remains, presumably including bacterial ones. The nannofosssil and foraminiferal assemblages indicate Quaternary age of sediments, and their phosphatization is consistent with the phosphatization age determined previously based on nonequilibrium uranium (within the limits of 1 My). The age of phosphatization and the Fe-Mn mineralization in the sediments from Pacific seamounts that young implies dependence of these ore-forming processes on oceanic environments favorable for ore accumulation rather than on their age.
Keywords:
Aluminium oxide; Archive of Ocean Data; ARCOD; Atomic absorption spectrometry (AAS); Calcium oxide; Carbon, organic, total; Carbon dioxide; Cerium; Dredge; DRG; Elevation of event; Europium; Event label; Gadolinium; Gerakl; Gerakl-1980; Inductively coupled plasma - mass spectrometry (ICP-MS); Iron oxide, Fe2O3; Lanthanum; Latitude of event; Longitude of event; Magnesium oxide; Manganese oxide; Neodymium; North Pacific; Phosphorus pentoxide; Potassium oxide; Samarium; Sample code/label; Silicon dioxide; Sodium oxide; TB-271; Titanium dioxide; Vityaz (ex-Mars); Vityaz-48; VITYAZ6259; VITYAZ6261-1a; VITYAZ6261-2a; Wet chemistry
Type:
Dataset
Format:
text/tab-separated-values, 54 data points
Permalink