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  • 1
    facet.materialart.
    Unknown
    Annotated record of the detailed examination of Mn deposits from DSDP Leg 27 (Sites 259, 261, 263) (1974)
    PANGAEA
    In:  Supplement to: Robinson, Paul T; Thayer, Julie A; Cook, Peter J; McKnight, Brian K (1974): Lithology of Mesozoic and Cenozoic Sediments of the Eastern Indian Ocean, Leg 27, Deep Sea Drilling Project. In: Veevers, J.J.; Heirtzler, J.R.; et al., Initial Reports of the Deep Sea Drilling Project, Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, XXVII, 1001-1047, https://doi.org/10.2973/dsdp.proc.27.148.1974
    Details
    Publication Date: 2023-08-28
    Description: During Leg 27 five sites were drilled in the eastern Indian Ocean, four in abyssal plains near the western margin of Australia and one in the Timor Trough. Abyssal plain sediments are divided into two major units: (1) a lower, acoustically transparent layer of relatively uniform thickness draped over basaltic basement and (2) a horizontally layered sequence of highly variable thickness filling low areas on the surface of the transparent layer. The transparent layer, ranging in age from Upper Jurassic to Upper Cretaceous, consists chiefly of dark gray, siliceous clays and claystones with minor zeolitic clay and nannofossil ooze. Sedimentation rates are between 5 and 30 m/m.y. being highest in the Lower Cretaceous. Upper Cretaceous sediment are sparse or absent. The relatively high sedimentation rates for pelagic clay are probably due to the proximity of the Australian continent. The layered unit consists of calcareous oozes and lesser zeolitic clay and radiolarian ooze, all of Cenozoic age. Many of the oozes contain shallow-water foraminifers and graded sequences suggesting deposition by mass transport.
    Keywords: 27-259; 27-261; 27-263; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Indian Ocean//PLAIN; Leg27; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sample code/label; Sediment type; Size; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 66 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Annotated record of the detailed examination of an Mn deposit surveyed in the North Atlantic Ocean (R/V Robert Conrad, Cruise 15) (1973)
    PANGAEA
    In:  Supplement to: Amos, A F; Garside, Christopher; Gerard, Robert D; Levitus, Sydney; Malone, T C; Paul, Allen Z; Roels, Oswald A (1973): Study of the impact of manganese nodule mining on the seabed and water column. In: Phase I Report - Inter-University Program of Research on Ferromanganese Deposits of the Ocean Floor. Seabed Assessment Program, International Decade of Ocean Exploration, National Science Foundation, Washington D.C., USA, 221-264, hdl:2027/wu.89033915380
    Details
    Publication Date: 2023-08-28
    Description: he proposed mining of ferromanganese deposits from the deep sea will affect benthic and pelagic environments depending to a great extent on the method of nodule retrieval and separation. Three basic deep-ocean mining systems have been proposed, each of which will effect the removal under varying conditions of water, sediment and nodules from the ocean floor. This report summarizes existing oceanographhic information on potential manganese nodule mining areas at the date of publication and presents the results of field observations in a manganese nodule area of the North Atlantic Ocean surveyed during Cruise 15 of the R/V Robert Conrad.
    Keywords: Atlantic Ocean; Comment; Deposit type; DEPTH, sediment/rock; Description; File name; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Photo/Video; Position; PV; Quantity of deposit; RC15; RC15-180C; Robert Conrad; Sediment type; Station 222; Uniform resource locator/link to image; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 9 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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