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...

Full description

Bibliographic Details
Main Authors: Kuno, Hisashi, Fisher, Robert L, Nasu, Noriyuki
Format: Dataset
Language:English
Published: PANGAEA 1956
Subjects:
Date/Time of event
Deposit type
DEPTH
sediment/rock
Description
Dredge
DRG
Elevation of event
Latitude of event
Longitude of event
NOAA and MMS Marine Minerals Geochemical Database
NOAA-MMS
Position
Quantity of deposit
Sample ID
Sediment type
Size
Spencer F. Baird
Substrate type
TRAN_JG
TRANSPAC
Trans-Pacific
Uniform resource locator/link to image
Western Pacific
Pacific
Kamchatka
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.862902
https://doi.org/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.

Similar Items