- 100
- aggregate
- aggregates
- background
- clay_altered
- farmland
- greywacke
- hg
- mineralisation
- mineralised
- natural
- northland
- oxidation
- partly
- pass
- ppm
- profile
- puhipuhi
- pyrite
- quarries
- regional
- release
- rivers
- road
- roads
- run_off
- sediments
- signature
- soil
- soils
- source
- surface
- surfaced
- traced
- transported
- typically
- underlie
- underlying
- unit
- variation
- watercourses
Connecting New Zealand's energy researchers to shape the future
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Publications
Publications
-
- Authors
- Dave Craw, D. Chappell, A. Black
- Journal
- New Zealand Journal of Marine and Freshwater Research
- Year
- 2002
- Roads in the Puhipuhi area of Northland, New Zealand, have been surfaced with road aggregate derived from hydrothermally mineralised rocks, which contain iron sulphides (pyrite and marcasite). Oxidati... REGISTER NOW TO SEE MORE
Surface run-off from mineralised road aggregate, Puhipuhi, Northland, New Zealand