Polyphase deformation of the massive sulphide ore of the Black Angel Mine, central West Greenland

1981 ◽  
Vol 16 (1) ◽  
Author(s):  
F.D. Pedersen
Keyword(s):  
Massive Sulphide ◽  
Polyphase Deformation ◽  
West Greenland ◽  
Sulphide Ore

Tourmalinites in supracrustal rocks in the Bjørnesund area, West Greenland

1992 ◽  
Vol 155 ◽  
pp. 73-78
Author(s):  
P.W.U Appel
Keyword(s):  
Depositional Environment ◽  
Massive Sulphide ◽  
Hydrothermal Solutions ◽  
West Greenland ◽  
Alteration Zones ◽  
Sulphide Ore ◽  
Hydrothermal Processes ◽  
Hydrothermal Origin ◽  
Ore Bodies ◽  
Geologic Setting

In the mid-Archaean supracrustal rocks of Bjørnesund south of Fiskenæsset metre wide anthophyllite-rich zones are found hosted in mafic volcanics. These zones, which are locally associated with sulphides, are interpreted as alteration zones from hydrothermal solutions which circulated through the volcano-sedimentary pile; in places they contain thin tourmalinites. The tourmaline composition and geologic setting of the occurrences closely resemble stratabound tourmalinites of submarine hydrothermal origin which elsewhere are associated with metalliferous deposits. It is concluded that the presence of the Bjørnesund tourmalinites associated with anthophyllite zones indicates that hydrothermal processes were once active in the depositional environment where the Bjørnesund supracrustals were formed; in other regions such processes are known to have generated massive sulphide ore bodies.

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

scholarly journals Epithermal gold and massive sulphide mineralisation in oil impregnated Palaeogene volcanic rocks of Ubekendt Ejland,West Greenland

2004 ◽  
Vol 4 ◽  
pp. 77-80 ◽  
Author(s):  
Stefan Bernstein ◽  
Christian Knudsen
Keyword(s):  
East Coast ◽  
Volcanic Rocks ◽  
Field Work ◽  
Hydrothermal Activity ◽  
Massive Sulphide ◽  
Sulphide Mineral ◽  
The South ◽  
West Greenland ◽  
Sulphide Mineralisation ◽  
Volcaniclastic Rocks

The discovery in 2002 of a gold mineralised quartz-carbonate vein at Ubekendt Ejland, central West Greenland, yielding 0.6 ppm Au over 0.7 m, led to a reconnaissance sampling project in summer 2003. Most of the accessible quartz-carbonate veins on the south-east coast of the island (Figs 1, 2) were sampled during boat-supported field work. Massive sulphide mineral deposits (Fe-Zn-Pb) were located in the centre of brecciated quartz-carbonate vein systems at several places along the south and south-east coast of the island, and gold anomalies mainly associated with the occurrence of the massive sulphides were identified. Pervasive hydrothermal alteration of the volcanic wall rocks surrounds the quartz-carbonate vein systems, which comprise low-temperature mineral assemblages dominated by dolomite and veined by chalcedony and fibrous silica. Evidence of oil migration into volcaniclastic rocks prior to the intense hydrothermal activity was found in several places in the form of organic carbon, interpreted to be pyrobitumen, that infills pores and cavities in hyaloclastites.

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