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Origins of Chalcocite Defined by Copper Isotope Values
- Source :
- Geofluids, Vol 2018 (2018)
- Publication Year :
- 2018
- Publisher :
- Hindawi Limited, 2018.
-
Abstract
- The origin of chalcocite is explored through a comparison of the copper isotope values of this mineral from supergene enrichment, sedimentary copper/red bed, and high-temperature hypogene mineralization around the world. Data from the literature and the data presented here (n=361) reveal that chalcocite from high-temperature mineralization has the tightest cluster of values of δCu65=0±0.6 in comparison to sedimentary copper/red bed δCu65=-0.9±1.0 and supergene enrichment δCu65=+1.9±1.8. Although the errors of the means overlap, large portions of the data lie in different values, allowing for distinguishing ranges for δCu65 of ‰ for sedimentary copper/red bed, between -1 and +1 for high-temperature hypogene, and >+1 for supergene enrichment chalcocite. The copper isotope values of sedimentary copper/red bed and supergene enrichment chalcocite are caused by redox reactions associated with the dissolution and transport of copper, whereas the tighter range of copper isotope values for hypogene minerals is associated with processes active with equilibrium conditions.
- Subjects :
- Chalcocite
Article Subject
010504 meteorology & atmospheric sciences
Chemistry
Isotopes of copper
lcsh:QE1-996.5
Inorganic chemistry
engineering.material
010502 geochemistry & geophysics
01 natural sciences
lcsh:Geology
engineering
General Earth and Planetary Sciences
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 14688123 and 14688115
- Volume :
- 2018
- Database :
- OpenAIRE
- Journal :
- Geofluids
- Accession number :
- edsair.doi.dedup.....baef14f3ec66e8d4caf2ec25bc334e61