Relative Sulphur Isotope Abundances in Strata - Bound Sulphide Deposits

1967 ◽  
Author(s):  
D F Sangster
Keyword(s):  
Sulphur Isotope ◽  
Sulphide Deposits

Oxygen and sulphur isotope compositions as indicators of the origin of Mesozoic and Cenozoic evaporites from Spain

1992 ◽  
Vol 102 (1-4) ◽  
pp. 229-244 ◽  
Author(s):  
Rosa Utrilla ◽  
Catherine Pierre ◽  
Federico Orti ◽  
Juan José Pueyo
Keyword(s):  
Sulphur Isotope

Sulphur isotope abundances in Aphebian clastic rocks: implications for the coeval atmosphere

Nature ◽  
1983 ◽  
Vol 302 (5906) ◽  
pp. 323-326 ◽  
Author(s):  
Keiko Hattori ◽  
Finley A. Campbell ◽  
H. Roy Krouse
Keyword(s):  
Sulphur Isotope ◽  
Clastic Rocks

The metamorphism of pyrite and pyritic ores: an overview

1993 ◽  
Vol 57 (386) ◽  
pp. 3-18 ◽  
Author(s):  
James R. Craig ◽  
Frank M. Vokes
Keyword(s):  
Isotope Exchange ◽  
Ore Deposits ◽  
Sulphur Isotope ◽  
Depositional History ◽  
Sulphide Minerals ◽  
Coexisting Phases

AbstractPyrite, the most widespread and abundant of sulphide minerals in the Earth's surficial rocks, commonly constitutes the primary opaque phase in ore deposits. Consequently, an understanding of the behaviour of pyrite and its relationships with coexisting phases during the metamorphism of pyritebearing rocks is vital to the interpretation of their genesis and post-depositional history. Metamorphism is commonly responsible for the obliteration of primary textures but recent studies have shown that the refractory nature of pyrite allows it to preserve some pre-metamorphic textures. Pyrrhotite in pyritic ores has often been attributed to the breakdown of pyrite during metamorphism. It is now clear that pyrrhotite can be primary and that the presence of pyrrhotite with the pyrite provides a buffer that constrains sulphur activity during metamorphism. Pyrite-pyrrhotite ratios change during metamorphism as prograde heating results in sulphur release from pyrite to form pyrrhotite and as retrograde cooling permits re-growth of pyrite as the pyrrhotite releases sulphur. Retrograde growth of pyrite may encapsulate textures developed during earlier stages as well as preserve evidence of retrograde events. Sulphur isotope exchange of pyrite with pyrrhotite tends to homogenise phases during prograde periods but leaves signatures of increasingly heavy sulphur in the pyrite during retrograde periods.

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