A Sr, Nd, and Pb isotope study of alkaline lamprophyres and related rocks from Westland and Otago, South Island, New Zealand
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Published:January 01, 1987
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CiteCitation
Barbara A. Barreiro, Alan F. Cooper, 1987. "A Sr, Nd, and Pb isotope study of alkaline lamprophyres and related rocks from Westland and Otago, South Island, New Zealand", Mantle Metasomatism and Alkaline Magmatism, Ellen Mullen Morris, Jill Dill Pasteris
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The Westland dike swarm of South Island, New Zealand, consists of a variety of ultrabasic, alkaline rock types including camptonite lamprophyres, ouachitite peridotites, and carbonatites. At least part of the swarm is as young as Oligocene-Miocene age. The majority of Nd and Sr isotope analyses for 16 dikes εNd = +3.5 to +5.2, 87Sr/86Sri = 0.7028 to 0.7035) fall to the left of the mantle array in Nd-Sr isotope correlation diagram. The data are similar to the ocean islands St. Helena and Tubuai and to some continental volcanics and mantle nodules (Menzies and Wass, 1983)....
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Contents
Mantle Metasomatism and Alkaline Magmatism

GeoRef
- alkalic composition
- alkaline earth metals
- Australasia
- dike swarms
- dikes
- geochemistry
- igneous rocks
- intrusions
- isotopes
- lamprophyres
- lead
- magmas
- metals
- Nd-144/Nd-143
- neodymium
- New Zealand
- Otago New Zealand
- partial melting
- Pb-206/Pb-204
- Pb-207/Pb-204
- Pb-208/Pb-204
- plutonic rocks
- processes
- radioactive isotopes
- rare earths
- ratios
- South Island
- Sr-87/Sr-86
- stable isotopes
- strontium
- trace elements
- Westland New Zealand