Copper-zinc mineralization in Mesozoic sediments in central areas of the Northwest Pacific (62nd voyage of the Glomar Challenger)

Author(s): Lazur, Yu. M.; Varentsov, I. M.; Yermilov, V. V.
Author Affiliation(s): Primary:
USSR Acad. Sci., Inst. Lithol., Moscow, USSR
Volume Title: Geochemistry International
Source: in cooperation with the [Geochemistry International, 22(4), p.66-72. Publisher: Scripta Publishing] American Geological Institute, Washington, DC, United States. ISSN: 0016-7029 CODEN: GCINAP
Note: In English. 16 refs.; illus.
Summary: Electron-probe analysis has been applied to the early Cretaceous volcanogenic-carbonate sediments in the western part of the Marcus-Necker underwater mountains (Mid-Pacific) and the Hess Rise (boreholes 463, 465, 465A and 466). The most characteristic mineral forms in which heavy metals occur have been identified: finely-divided Fe, Cu and Zn sulphides. There is also some occurrence of natural alloys, of Cu + Zn composition (brass), which occur in the volcaniclastic components and which were formed during the reducing stage of endogenous basalt evolution. Post-sedimentation changes in the sediments enriched in metals by hydrothermal processes have produced the sulphides of Fe, Cu and Zn as a result of the presence of organic matter, and these reflect the major features of the Mesozoic sedimentation in the region. (Authors' abstract)
Year of Publication: 1985
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 02 Geochemistry; 27 Economic Geology, Metals; Copper ores; DSDP Site 463; DSDP Site 465; DSDP Site 466; Deep Sea Drilling Project; Economic geology; Geochemical methods; Hess Rise; IPOD; Leg 62; Marcus-Necker; Mesozoic; Metal ores; Mid-Pacific Rise; Mineral exploration; North Pacific; Northwest Pacific; Pacific Ocean; Sulfides; Trace elements; West Pacific; Zinc ores
Coordinates: N212101 N212101 E1744004 E1744004
N334914 N334914 E1785508 E1785508
N341128 N341128 E1791521 E1791521
Record ID: 1989071143
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom