Fossil manganese deposits buried within DSDP/ODP cores, Legs 1-126

Probable in-situ manganese deposits larger than 1 cm in diameter buried in ODP/DSDP cores were selected for study after examining previous descriptions of the manganese deposits in site reports and the ODP data base. Most of the selected samples from 11 cores occur at or just above sedimentary hiatu...

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Bibliographic Details
Main Authors: Usui, Akira, Ito, Takashi
Format: Dataset
Language:English
Published: PANGAEA 1994
Subjects:
108-661A
114-699A
122-760A
1-5
15-150
32-303
36-328
5-37
62-464
81-554A
86-578
93-603B
Caribbean Sea/BASIN
Deep Sea Drilling Project
DRILL
Drilling/drill rig
DSDP
Glomar Challenger
Joides Resolution
Leg1
Leg108
Leg114
Leg122
Leg15
Leg32
Leg36
Leg5
Leg62
Leg81
Leg86
Leg93
North Atlantic/BASIN
North Atlantic/PLATEAU
North Atlantic Ocean
North Pacific
North Pacific/BASIN
North Pacific/CONT RISE
North Pacific/HILL
Ocean Drilling Program
ODP
South Atlantic/BASIN
South Atlantic Ocean
South Indian Ridge
South Indian Ocean
Pacific
Indian
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.759264
https://doi.org/10.1594/PANGAEA.759264
Description
Summary:Probable in-situ manganese deposits larger than 1 cm in diameter buried in ODP/DSDP cores were selected for study after examining previous descriptions of the manganese deposits in site reports and the ODP data base. Most of the selected samples from 11 cores occur at or just above sedimentary hiatuses or in slowly deposited sediments and are overlain by rapidly deposited sediments of biogenic, terrigenous or volcanogenic origin. The changes in sedimentation recorded in the lithostratigraphic sections around these deposits are closely related to changes in tectonic evolution, deep water circulation or biological productivity at the sites. The similarity in composition and structure of the buried deposits to those of the modern manganese nodules and crusts with no evidence of post-depositional change suggest that buried manganese deposits may be used as indicators of past sedimentary conditions during which they formed. Their major components are hydrogenetic and earlydiagenetic manganese minerals as well as detrital minerals. The characteristics of these manganese deposits suggests that similar processes of deposition have taken place since the Paleogene or older.

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