Analysis of Mn deposits from Galicia Bank Leg 47

This report deals with results of the first stage of a complex study of the predominantly Lower Cretaceous sediments cored at Site 398 at depths from 945 to 1740 meters. The section studied is overlain by 35 meters of Cenomanian sediments, which are similar lithologically to the underlying sequence....

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Bibliographic Details
Main Authors: Basov, Valery A, Lopatin, B G, Gramberg, Igor S, Danjushevskaya, A I, Kabankov, V Y, Lazurkin, V M, Patrunov, D K
Format: Other/Unknown Material
Language:English
Published: PANGAEA 1979
Subjects:
47-397
47-398B
47-398D
Deep Sea Drilling Project
DRILL
Drilling/drill rig
DSDP
Glomar Challenger
Leg47
NOAA and MMS Marine Minerals Geochemical Database
NOAA-MMS
North Atlantic/CONT RISE
North Atlantic/SEAMOUNT
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.872164
https://doi.org/10.1594/PANGAEA.872164
Description
Summary:This report deals with results of the first stage of a complex study of the predominantly Lower Cretaceous sediments cored at Site 398 at depths from 945 to 1740 meters. The section studied is overlain by 35 meters of Cenomanian sediments, which are similar lithologically to the underlying sequence. In the upper part (Unit 3) a major rock-forming carbonate mineral is present in much of the section as calcite, often with distinct structural features indicative of a biogenic origin (nannofossils, skeletal detritus) and diagenetic recrystallization. Unit 3 is characterized by abundant authigenic minerals represented mainly by siderite and manganese-bearing carbonate minerals.

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