Energy Citations Database

Bibliographic Citation

 
Document
For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field.
For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability.
Title Geochemical processes of formations of red-bed associated Cu-Co deposit at Kamoto, Zaire
Creator/Author Hoy, L.D. ; Ohmoto, H. ; Rose, A.W.
Publication Date1985 Jan 01
OSTI IdentifierOSTI ID: 6196953
Report Number(s)CONF-8510489-
Other Number(s)CODEN: GAAPB
Resource TypeConference
Specific TypeJournal Article
Resource RelationGeol. Soc. Am., Abstr. Programs ; Vol/Issue: 17; 98. annual meeting of the Geological Society of America; 28 Oct 1985; Orlando, FL, USA
Research OrgPennsylvania State Univ., University Park (USA)
Subject580300 -- Mineralogy, Petrology, & Rock Mechanics-- (-1989) ;580400 -- Geochemistry-- (-1989); CARBONATE ROCKS-- DIAGENESIS;CARBONATE ROCKS-- HYDROTHERMAL ALTERATION;COBALT ORES-- CHEMICAL COMPOSITION;COBALT ORES-- MINERALIZATION;COBALT ORES-- PETROGENESIS;COPPER ORES-- CHEMICAL COMPOSITION;COPPER ORES-- MINERALIZATION;COPPER ORES-- PETROGENESIS;ZAIRE REPUBLIC-- CARBONATE ROCKS;ZAIRE REPUBLIC-- COBALT ORES;ZAIRE REPUBLIC-- COPPER ORES; CARBON 13;GEOCHEMISTRY;HYDROTHERMAL SYNTHESIS;ISOTOPE RATIO;MINERALOGY;OXYGEN 18;PETROLOGY;PYRITE;QUANTITATIVE CHEMICAL ANALYSIS;SULFUR CONTENT
Related SubjectAFRICA;CARBON ISOTOPES;CHALCOGENIDES;CHEMICAL ANALYSIS;CHEMISTRY;DEVELOPING COUNTRIES;EVEN-EVEN NUCLEI;EVEN-ODD NUCLEI;GEOLOGY;IRON COMPOUNDS;IRON SULFIDES;ISOTOPES;LIGHT NUCLEI;MINERALS;NUCLEI;ORES;OXYGEN ISOTOPES;ROCKS;SEDIMENTARY ROCKS;STABLE ISOTOPES;SULFIDE MINERALS;SULFIDES;SULFUR COMPOUNDS;SYNTHESIS;TRANSITION ELEMENT COMPOUNDS
Description/Abstract In the stratiform Cu-Co deposit at Kamoto, ore minerals occur in layers conformable to bedding, or as replacement of nodular and/or bedded dolomite within marine to littoral sediments overlying a thick continental red-bed sequence. delta/sup 13/C and delta/sup 13/O values of more than 70 dolomite samples from the red-bed, ore zone and unmineralized hangingwall sediments were determined to be -9 to +3 per thousand (PDB) and + 7 to +24 per thousand(SMOW), respectively.^The delta/sup 13/C values correlate negatively with the amount of relict organic matter in the samples.^Poor correlation between delta/sup 13/C and delta/sup 18/O indicates that dolomitization incorporating oxidized organic carbon occurred through a large temperature range. delta/sup 34/S values of about 70 ore sulfide samples range from -15 to +17 per thousand (CDT), correlating positively with both total S content of the samples and the delta/sup 13/C of associated dolomite.^The isotopic data, the overgrowth and replacement textures observed among ore and gangue minerals, and the results of thermochemical calculations on the solubility and stability of the sulfides suggest that: (1) less than 30% of the sulfide sulfur in the deposit was fixed as bacteriogenic pyrite during early diagenesis; and (2) the Cu and Co sulfides were formed by later reaction between Cu-, Co- and SO/sub 4/-bearing hot (50-200/sup 0/C.) brines and the diagenetic pyrite, augmented by additional sulfate reduction through organic matter oxidation.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 614
System Entry Date2001 May 13

Top