Brief description
The Ni-Cu-(PGE) deposits of the Norilsk area in Siberia are some of the world’s most valuable ores, and played a role in the greatest mass extinction in Earth history. A unique feature is the presence of low-S, high PGE mineralisation. Based on previous synchrotron experiments we have hypothesized that these unusual ores may have formed by “bubble-rafting” of sulfide droplets on gas bubbles, and that the high PGE/S could be related to loss of S to the vapour phase during degassing. We will test this model by imaging a remarkable new suite of samples from recent exploration drilling.Lineage: Data was produced using the Maia 384 element detector array on the XFM X-ray microprobe beamline of the Australian Synchrotron and processed using the GeoPIXE software package.
Available: 2024-04-02
Subjects
Biomineralisation |
Earth Sciences |
Earth System Sciences |
Geochemistry |
Geology |
Inorganic Geochemistry |
Instruments and Techniques |
Other Earth Sciences |
Physical Sciences |
Physical Geography and Environmental Geoscience |
Regolith and Landscape Evolution |
Resource Geoscience |
Synchrotrons |
Synchrotrons and Accelerators |
copper |
nickel |
ores |
palladium |
sulfide |
vapour |
volatiles |
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