The role of granites in volcanic-hosted massive sulphide ore-forming systems: an assessment of magmatic–hydrothermal contributions

2010 ◽  
Vol 46 (5-6) ◽  
pp. 473-507 ◽  
Author(s):  
David L. Huston ◽  
Jorge M. R. S. Relvas ◽  
J. Bruce Gemmell ◽  
Susan Drieberg
Keyword(s):  
Massive Sulphide ◽  
Sulphide Ore

Contrasting arc and MORB-like assemblages in the Paleoproterozoic Flin Flon Belt, Manitoba, and the role of intra-arc extension in localizing volcanic-hosted massive sulphide deposits

1999 ◽  
Vol 36 (11) ◽  
pp. 1767-1788 ◽  
Author(s):  
E C Syme ◽  
S B Lucas ◽  
A H Bailes ◽  
R A Stern
Keyword(s):  
High Heat ◽  
Massive Sulphide ◽  
Calc Alkaline ◽  
Sulphide Ore ◽  
Hydrothermal Convection ◽  
Vms Deposits ◽  
Extensional Faulting ◽  
Flin Flon ◽  
Back Arc

The Flin Flon Belt (Trans-Hudson Orogen, Manitoba and Saskatchewan) is the largest Paleoproterozoic volcanic-hosted massive sulphide (VMS) district in the world, with 118.7 million tonnes (Mt) of Zn-Cu-(Au-Ag) sulphide ore in 25 past or presently producing mines and 64.3 Mt in subeconomic deposits. The orebodies are restricted to isotopically juvenile volcanic-arc sequences, dated at 1.903-1.881 Ga at Flin Flon. Sequences of ca. 1.904-1.901 Ga back-arc and ocean-plateau basalts and related plutonic rocks, structurally juxtaposed with the arc assemblages at 1.880-1.870 Ga, are not known to contain economic base metal deposits. The juvenile arc tectono-stratigraphic assemblages are generally marked by older and stratigraphically lower tholeiitic submarine volcanic packages (ca. 1.903-1.886 Ga) that are observed or interpreted to be overlain by extensive and lithologically varied sequences of calc-alkaline and alkaline (shoshonitic) arc rocks and arc rift deposits (ca. 1.888-1.881 Ga). VMS deposits occur in both the tholeiitic and calc-alkaline arc sequences, but the 62 Mt Flin Flon deposit occurs in a 1.903 Ga tholeiitic primitive arc package. It can be demonstrated that for the Flin Flon - Callinan - Triple 7, Cuprus, and White Lake VMS deposits, whose stratigraphic context is preserved, deposition of the massive sulphides was temporally associated with inferred arc rifting processes. Critical observations for arc rifting include evidence for extensional faulting, erosion, and development of unconformities; extrusion of MORB-like basalts and associated rhyolites; and development of depositional basins with thick sequences of shoshonitic turbidites. As has been proposed for other major VMS camps (e.g., Kuroko, Kidd Creek, Bathurst), arc rifting can generate the loci of sustained high heat flow and fluid pathways required for the development of long-lived hydrothermal convection systems.

THE CYLINDRICAL ORE BODY IN THE PRESENCE OF A CABLE CARRYING AN OSCILLATING CURRENT

Geophysics ◽  
1952 ◽  
Vol 17 (2) ◽  
pp. 378-386 ◽  
Author(s):  
James R. Wait
Keyword(s):  
Electrical Properties ◽  
Massive Sulphide ◽  
Conducting Medium ◽  
Geophysical Prospecting ◽  
Conducting Cylinder ◽  
Sulphide Ore ◽  
Ore Body ◽  
The Media ◽  
Special Case ◽  
Ore Zones

The problem of an infinite cable carrying an oscillating current parallel to a conducting cylinder is solved. The homogeneous electrical properties of the media inside and outside the cylinder can be arbitrary. The special case is considered in detail where the exterior medium is a relatively poor conducting medium. The application to geophysical prospecting for massive sulphide ore zones is discussed.

Variations in platinum group element concentrations in the Alexo mine komatiite, Abitibi greenstone belt, northern Ontario

1986 ◽  
Vol 123 (5) ◽  
pp. 515-524 ◽  
Author(s):  
Sarah-Jane Barnes ◽  
A. J. Naldrett
Keyword(s):  
Platinum Group Element ◽  
Group Element ◽  
Massive Sulphide ◽  
Mass Balance Calculation ◽  
Northern Ontario ◽  
Sulphide Liquid ◽  
Sulphide Ore ◽  
Intermediate Degree ◽  
Co Concentrations ◽  
Massive Sulphides

AbstractThe noble element (Os, Ir, Ru, Rh, Pt, Pd, Au) patterns from sulphides associated with the komatiites at the Alexo mine show variable degrees of fractionation. Massive sulphides at the contact between underlying intermediate volcanics and overlying komatiites have the least fractionated patterns (Pd/Ir = 44). Net-textured sulphides which immediately overlie the massive sulphides have extremely fractionated noble element patterns (Pd/Ir = 171). The disseminated sulphides in the overlying komatiite exhibit an intermediate degree of fractionation (Pd/Ir = 110). The variations in noble element patterns are complemented by variations in the Ni, Cu and Co concentrations. The massive sulphides are depleted in all three of these elements relative to the net-textured sulphide ore. The disseminated sulphides have intermediate values of Ni and Co, but are enriched in Cu relative to the other two sulphides.Processes that could have affected the composition of the sulphides include: (a) fractionation of monosulphide solid solution (Mss) from a sulphide liquid during initial cooling of the komatiite, and (b) mobilization of Pt, Pd, Au, Cu, Ni and Co from the massive sulphide into footwall veins. A mass balance calculation indicates that the sum of the massive and net-textured sulphide agrees with the disseminated sulphide for all elements except Au. Thus the massive sulphide cannot have lost significant amounts of Pt, Pd, Ni and Co to footwall veins and significant mobilization of these elements does not appear to have occurred. The crystallization of Mss from a sulphide liquid will account for the enrichment of Ir, Os, Ru and Rh in the massive sulphide relative to the net-textured sulphide, and enrichment of Pd, Pt, Au, Co and Ni in the net-textured sulphide relative to the disseminated sulphide.

scholarly journals Distribution of Sb minerals in the Cu and Zn flotation of Rockliden massive sulphide ore in north-central Sweden

2015 ◽  
Vol 82 ◽  
pp. 125-135 ◽  
Author(s):  
Friederike E. Minz ◽  
Nils-Johan Bolin ◽  
Pertti Lamberg ◽  
Kai Bachmann ◽  
Jens Gutzmer ◽  
...  
Keyword(s):  
Massive Sulphide ◽  
North Central ◽  
Sulphide Ore ◽  
Cu And Zn

Symplectite of pyrite and magnetite in the massive sulphide ore of the Mashan mine, Anhui Province

1997 ◽  
Vol 16 (4) ◽  
pp. 359-362 ◽  
Author(s):  
Lianxing Gu ◽  
Wenlan Zhang ◽  
Lin Yin ◽  
Bin Zhou
Keyword(s):  
Anhui Province ◽  
Massive Sulphide ◽  
Sulphide Ore

Marinobacterbacteria associated with a massive sulphide ore deposit affect metal mobility in the deep subsurface

2015 ◽  
Vol 15 (4) ◽  
pp. 319-326 ◽  
Author(s):  
Karla Leslie ◽  
Arne Sturm ◽  
Randy Stotler ◽  
Christopher J. Oates ◽  
T. Kurt Kyser ◽  
...  
Keyword(s):  
Massive Sulphide ◽  
Metal Mobility ◽  
Deep Subsurface ◽  
Ore Deposit ◽  
Sulphide Ore
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