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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Primary terms
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stable isotopes
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Pb-206/Pb-204 (2)
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Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
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S-33 (1)
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S-34/S-32 (2)
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metal ores
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base metals (2)
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copper ores (3)
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gold ores (3)
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iron ores (2)
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lead ores (2)
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lead-zinc deposits (2)
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silver ores (2)
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zinc ores (4)
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metals
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alkaline earth metals
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magnesium (1)
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iron
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Perkoa Deposit
The Perkoa Zinc Deposit, Burkina Faso
F ig . 2. Cross sections of the Perkoa deposit. Evidence presented in...
F ig . 3. Longitudinal section of the Perkoa deposit with isopachs of the t...
The timing of major Zn mineralizing events in Australia compared to events ...
Lead isotope signature of early Proterozoic ore deposits in western Africa; comparison with gold deposits in French Guiana
F ig . 14. Triangular plot of the composition of zincian spinel from Perkoa...
F ig . 1. Geological map of West Africa, with localities mentioned in...
The Paleoproterozoic Copper-Gold Deposits of the Gaoua District, Burkina Faso: Superposition of Orogenic Gold on a Porphyry Copper Occurrence?
The Falémé Iron District, Senegal
The Geology and Metallogeny of Volcanic-Hosted Massive Sulfide Deposits: Variations through Geologic Time and with Tectonic Setting
ZINCIAN SPINEL ASSOCIATED WITH METAMORPHOSED PROTEROZOIC BASE-METAL SULFIDE OCCURRENCES, COLORADO: A RE-EVALUATION OF GAHNITE COMPOSITION AS A GUIDE IN EXPLORATION
Australian Zn-Pb-Ag Ore-Forming Systems: A Review and Analysis
Geodynamic setting of the Birimian volcanism in central Ivory Coast (western Africa) and its place in the Palaeoproterozoic evolution of the Man Shield
Re-Os Geochronological Evidence for Multiple Paleoproterozoic Gold Events at the Scale of the West African Craton
SEG Newsletter 75 (October)
Abstract The link between observed episodicity in ore deposit formation and preservation and the supercontinent cycle is well established, but this general framework has not, however, been able to explain a lack of deposits associated with some accretionary orogens during specific periods of Earth history. Here we show that there are intriguing correlations between styles of orogenesis and specific mineral deposit types, in the context of the Nuna supercontinent cycle. Using animated global reconstructions of Nuna’s assembly and initial breakup, and integrating extensive databases of mineral deposits, stratigraphy, geochronology and palaeomagnetism we are able to assess spatial patterns of deposit formation and preservation. We find that lode gold, volcanic-hosted-massive-sulphide and nickel–copper deposits peak during closure of Nuna’s interior ocean but decline during subsequent peripheral orogenesis, suggesting that accretionary style is also important. Deposits such as intrusion-related gold, carbonate-hosted lead-zinc and unconformity uranium deposits are associated with the post-assembly, peripheral orogenic phase. These observations imply that the use of plate reconstructions to assess orogenic style, although challenging for the Precambrian, can be a powerful tool for mineral exploration targeting. Supplementary material: Supplementary material including (1) tables (S1–S3) of Euler poles and palaeopoles used, summary of Nuna orogens; (2) a figure (S1) of modelled plate velocities; (3) mp4 files (S1 & S2) of the model with age data; ore deposits and VGPs; and (4) a zip file (S1) of the Gplates model is available at http://www.geolsoc.org.uk/SUP18822 .