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Exon, Neville F (1979): Investigation of manganese nodules from the Southern Tasman Sea. PANGAEA,, Supplement to: Exon, NF (1979): Deep-sea sediments and manganese nodules from the Southern Tasman Sea. Bureau of Mineral Resources, Geology and Geophysics, Australia., No. 1979/62, 14 pp, hdl:10013/epic.46337.d001

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Two manganese nodules having a high clay content, a low Mn/Fe ratio, and low contents of valuable metals (Ni 0.25%, Cu 0.17%, Co 0.06%) were recovered in a grab sample during a short geological cruise in HMAS Kimbla in the southern Tasman Sea in May 1979. Five stations were occupied. Free-fall grabs recovered sediment or pumice from four stations; nothing was recovered from the fifth. The carbonate compensation depth in the region is about 4500 m. Reddish brown clay, but no manganese nodules, was recovered in the central southern Tasman Sea, from depths of 4900-5100 m. The nodules, together with grey calcareous mud, were obtained from a depth of 4300 m, farther to the northwest, near Gascoyne Seamount (250 n. miles SE of Sydney). The results suggest nodules with high metal values are likely to exist only in the broad and deep depression in the central southern Tasman Sea southeast of Gascoyne Seamount, where sedimentation rates are low and oxidising conditions prevail. Whether nodule fields are present or not will only be resolved by considerably more sampling.
Source data set:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA,
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA,
Latitude: -36.250000 * Longitude: 155.583300
Date/Time Start: 1979-05-28T00:00:00 * Date/Time End: 1979-05-28T00:00:00
STK79-DR5B * Latitude: -36.250000 * Longitude: 155.583300 * Date/Time: 1979-05-28T00:00:00 * Elevation: -4300.0 m * Location: Tasman Sea * Campaign: KIMBLA79 * Basis: Kimbla * Method/Device: Dredge (DRG)
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