Reconnaissance rare earth element (REE) geochemistry of Ohika Detachment Fault (Buller) and Mandamus Intrusives (North Canterbury), New Zealand

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Tulloch, A.J.; Christie, A.B. 2000 Reconnaissance rare earth element (REE) geochemistry of Ohika Detachment Fault (Buller) and Mandamus Intrusives (North Canterbury), New Zealand. Lower Hutt: Institute of Geological & Nuclear Sciences. Institute of Geological & Nuclear Sciences science report 2000/10 26 p.

Abstract: Previous studies have identified elevated rare earth element (REE) concentrations in igneous rocks and stream sediments from the Paparoa metamorphic core complex of north Westland and in igneous rocks from the Mandamus Intrusives of north Canterbury, suggesting the potential for the occurrence of hydrothermal REE deposits. We selected suites of rocks previously sampled from these areas and housed in the National Petrology Reference Collection, and analysed them by ICP-MS to determine their REE, Ba, Th, Nb, Y, Hf, Ta, U, Pb, Rb, Cs, Sr and Sc contents, and by XRF for major elements plus their Zr, Ga, Zn, Cu, V, Ni, Cr and Sc contents. (auth)