Description of manganese deposits collected by RV Spencer F. Baird during the Trans-Pacific expedition in the Western Pacific in 1953 ...

Fifty-five rock fragments and pebbles were dredged at 2,550-2,800 fathoms (4,650-5,100 metres) near Jimmu Seamount, 700 miles southeast of Kamchatka. Tuffaceous shale, andesitic and dacitic tuff, pyroxene-hornblende dacite-pumice, and augite-hypersthene andesite are the most abundant rock types. Min...

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Bibliographic Details
Main Authors: Kuno, Hisashi, Fisher, Robert L, Nasu, Noriyuki
Format: Dataset
Language:English
Published: PANGAEA 1956
Subjects:
Sample ID
Date/Time of event
Latitude of event
Longitude of event
Elevation of event
DEPTH, sediment/rock
Position
Deposit type
Quantity of deposit
Size
Substrate type
Sediment type
Description
Uniform resource locator/link to image
Dredge
Trans-Pacific
Spencer F. Baird
NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS
Kamchatka
Online Access:https://dx.doi.org/10.1594/pangaea.862902
https://doi.pangaea.de/10.1594/PANGAEA.862902
Description
Summary:Fifty-five rock fragments and pebbles were dredged at 2,550-2,800 fathoms (4,650-5,100 metres) near Jimmu Seamount, 700 miles southeast of Kamchatka. Tuffaceous shale, andesitic and dacitic tuff, pyroxene-hornblende dacite-pumice, and augite-hypersthene andesite are the most abundant rock types. Minor constituents in the haul include augite-pigeonite basalt, augite-olivine basalt, olivine dolerite, quartz syenite porphyry, metabasalt, sandstone, and chert. Petrographic and chemical analyses indicate closer affinities with Kuril Islands and Kamchatka volcanic rocks than with Cenozoic Japanese or Pacific Basin types. Probably these rocks were dropped by Pleistocene icebergs carried south and east by ocean currents. ... : From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database. ...

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