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The distribution of trace elements in a sub-bituminous coal seam and a peat dome both located in the Waikato/Hauraki region of the central North Island of New Zealand is controlled by the presence or absence of inorganic layers. One of these is a volcanic ash fall layer (tephra) containing high titanium and low calcium levels compared to inorganic phases in other regions of the seam. When coal samples...
During 3 surveys in 1992, water and sediment samples were collected from the length of the Whangaehu River and above the confluence points of major tributaries. The waters were analysed for major cations (Ca, Li, Mg, Na), anions (Cl, SO 4 ), metals (Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn), SiO 2 , pH, conductivity and temperature. The sediments were analysed for some metals...
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