The composition of nickel‐copper sulphide deposits and their host rocks from the Cape Smith Fold Belt, Northern Quebec

1992 ◽  
Vol 39 (3) ◽  
pp. 335-347 ◽  
Author(s):  
S‐J. Barnes ◽  
C. Picard ◽  
D. Giovenazzo ◽  
C. Tremblay
Keyword(s):  
Copper Sulphide ◽  
Fold Belt ◽  
Nickel Copper ◽  
Sulphide Deposits ◽  
Host Rocks

Bioleaching strategies for the treatment of nickel–copper sulphide concentrates

2011 ◽  
Vol 24 (11) ◽  
pp. 1106-1112 ◽  
Author(s):  
Mariekie Gericke ◽  
Yageshni Govender
Keyword(s):  
Copper Sulphide ◽  
Nickel Copper

scholarly journals Structural framework of rocks of the Lagoa D'anta mine area, iron-manganese Urandi-Caetité-Licínio de Almeida District, Bahia, Brasil

2015 ◽  
Vol 45 (2) ◽  
pp. 173-192 ◽  
Author(s):  
Jofre de Oliveira Borges ◽  
Simone Cerqueira Pereira Cruz ◽  
Johildo Salomão Figueiredo Barbosa ◽  
Edmar da Silva Santos
Keyword(s):  
Meteoric Water ◽  
Shear Zones ◽  
Fold Belt ◽  
Structural Framework ◽  
Iron Mine ◽  
Main Circulation ◽  
Host Rocks ◽  
Iron Manganese ◽  
Araçuaí Orogen ◽  
Western Portion

<p>The Urandi-Caetité-Licínio de Almeida Iron-Manganese District encompasses a total of 35 manganese mines, most of which are already exhausted, and 1 currently active iron mine. The host rocks of these ores are associated with the Paleoproterozoic Caetité-Licínio de Almeida Metavolcanossedimentary Sequence. These units have been deformed by the northern Serra do Espinhaço Thrust and Fold Belt, in the northern section of the Araçuaí Orogen. Interbeddings of itabirite, cummingtonite schist, calcite and manganese-dolomitic marbles, calc-silicate and carbonate-silicate rocks, and amphibolitic metabasalt were found at the Lagoa D'anta mine, in addition to quartz-jacobsite schist, residual manganese-rich soil and manganese lateritic breccia. The main structural framework presents a general NE-SW trend and it consists predominantly of compressional structures. This structural framework is associated with the evolution of two Ediacaran dextral transpressional shear zones, the Carrapato zone, in the western portion, and São Timóteo zone, in the eastern portion. The structural framework of the Lagoa D'anta mine reflects a higher degree of shortening in the southern sector of the northern Serra do Espinhaço Thrust and Fold Belt, in the northern area of the Araçuaí Orogen. The ductile structures related to these deformational phases were nucleated under conditions of progressive metamorphism with minimum temperature of 550°C. Stockwork structures of quartz, calcite, epidote, grunerite and magnetite truncate the mine's ductile structures. Fractures were the main circulation channels for meteoric water, which culminated in the formation of a high-content supergene ore in the mine.</p>

scholarly journals Noritic rocks and associated nickel-copper-sulphide occurrences in Sukkertoppen district, central West Greenland

1983 ◽  
Vol 115 ◽  
pp. 30-34
Author(s):  
K Secher
Keyword(s):  
Mineral Resources ◽  
Field Work ◽  
General Description ◽  
Copper Sulphide ◽  
West Greenland ◽  
Gneiss Complex ◽  
Nickel Copper ◽  
Geophysical Investigations ◽  
Geochemical Investigation ◽  
Rock Suite

Field work in 1982 included detailed mapping and collection of samples of sulphide occurrences in the so called 'norite belt', Sukkertoppen district. Several nickel-copper-sulphide mineralisations related to norite rocks are known from the work of Kryolitselskabet Øresund A/S who mapped this rock suite and carried out exploratory investigations of the sulphides (Nielsen, 1976). The earlier mapping has revealed a suite of metabasic plutonic rocks of mainly noritic composition which are situated in an arcuate belt, approximately 15 x 75 km, curving around the Finnefjeld gneiss complex east of Sukkertoppen (fig. 8). Metanorites are embedded in quartzo-feldspathic gneisses and rarely in amphibolitic rocks, and they occur as a series of irregular pods up to 6 km Iong within the arcuate belt. The present investigation was carried out as part of GGU's mineral resources mapping and evaluation programme in central West Greenland, which this year focussed on the area covered by the 1:250000 map sheet 65 V.2. The fieId work was carried out in dose cooperation with teams doing systematic reconnaissance geochemical stream-sediment and water sampling (to be discussed elsewhere), detailed soil geochemical investigation (Jensen & Secher, this report) and experimental geophysical investigations (Thorning, this report). The present work aimed at a general description of the structure and the metallogenetic behaviour of the known norite-related sulphide occurrences in order to reach an understanding of the mineral genesis within this section of the Archaean environment.

A cupric chloride-oxygen leach process for a nickel-copper sulphide concentrate

1985 ◽  
Vol 15 (1) ◽  
pp. 25-32 ◽  
Author(s):  
T.K. Mukherjee ◽  
R.C. Hubli ◽  
C.K. Gupta
Keyword(s):  
Cupric Chloride ◽  
Copper Sulphide ◽  
Nickel Copper
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