UNIGE document Chapitre d'actes
previous document  unige:78648  next document
add to browser collection
Title

Tracing back sulfur isotope reequilibration due to contact metamorphism: A case study from the Perubar VMS deposit, Central Peru

Authors
Spangenberg, Jorge
Published in C.J. Stanley et al. Mineral deposits: processes to processing, Proceedings of the 5th biennial SGA meeting. London - 1999 - Rotterdam: Balkema. 1999, p. 967-970
Abstract The mid-Cretaceous Perubar VMS deposit, Central Peru, affected by contact metamorphism, has been the subject of a sulfur isotope investigation. The measured δ34S values for sulfate-sulfide pairs from the deposit indicate that close to equilibrium isotopic reequilibration occurred during metamorphism. After “filtering” the contact metamorphism effect, sulfur isotope desiquilibrium trends for coexisting sulfate-sulfide pairs were obtained on the δ34S versus Δ34S diagram, indicating a mixing between seawater sulfate and hydrothermal H2S. It suggests that contact metamorphism occurred in a closed system and that the original bulk sulfur isotope composition of the Perubar deposit was mostly preserved. Sulfur reequilibrated only locally, by isotope exchanges between adjacent sulfate and sulfide minerals.
Full text
Structures
Research group Mineral Resources and Geofluids
Citation
(ISO format)
POLLIAND, Marc, FONTBOTÉ, Lluis, SPANGENBERG, Jorge. Tracing back sulfur isotope reequilibration due to contact metamorphism: A case study from the Perubar VMS deposit, Central Peru. In: C.J. Stanley et al. (Ed.). Mineral deposits: processes to processing, Proceedings of the 5th biennial SGA meeting. London. Rotterdam : Balkema, 1999. p. 967-970. https://archive-ouverte.unige.ch/unige:78648

114 hits

29 downloads

Update

Deposited on : 2015-12-15

Export document
Format :
Citation style :