Publication Date:
2023-08-28
Description:
Specimens dredged from within the summit of a volcanic seamount during an oceanographic cruise in the Eolian Island Arc (South Tyrrhenian Sea) where examined. Mineralization, which forms veins and pockets within a silty-clayey material, consists mainly of todorokite with scarce birnessite. The chemistry (Mn 48%, Fe 0.26 %, Ni 249 ppm, Co 223 ppm) and the mineralogy of the deposit are discussed; the findings, compared with data from some of the literature, suggest a hydrothermal genesis with extreme fractionations of Mn from Fe. A process explaining the anomalous Cu content (8 200 ppm) of the deposit is also suggested.
Keywords:
Aluminium; Bannock; BAN-T78L; Barium; Calcium; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Gravimetric analysis; Identification; Iron; Lametino 1 Seamount; Loss on ignition; Magnesium; Manganese; Molybdenum; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Potassium; Rubidium; Silicon; Size; Sodium; Spectrophotometry; Strontium; Substrate type; T78; Titanium; Vanadium; X-ray fluorescence (XRF); Zinc
Type:
Dataset
Format:
text/tab-separated-values, 24 data points
