Abstract:
This data includes the results of hydrous phase equilibria experiments using a high-K calc-alkaline basalt from Taranaki volcano, New Zealand, as a starting material. Experiments were run at pressures of 200, 500 and 1000 MPa and temperatures of 950-1100C. In 200 MPa experiments oxygen fugacity was buffered at 1-2 log units above NiNiO buffer, with experiments run at higher pressures being un-buffered. Experiments either had 3 or 5-6 wt.% H2O added. Comparison between experimental results and natural samples favours crystallisation of Taranaki magmas at upper crustal pressures of ~200 MPa.
Also included in this dataset are the results of analyses of H in 189 clinopyroxene grains from Taranaki pumices. These analyses were run on the SHRIMP-SI at the Australian National University. Magmatic water was calculated from H concentrations, suggesting that basaltic magmas from Taranaki contain up to 4 wt.% H2O.
How to cite this dataset:
Firth, C., 2026. Phase equilibria experiments and water-in-clinopyroxene analyses from high-K calc-alklaine magmas, Taranaki volcano, New Zealand, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA).
https://doi.org/10.60520/IEDA/114478. Accessed 2026-05-25.
Related
Publication(s):
Firth, C, Adam, J, Davidson, A, Turner, S, Jinag, W, Martel, C, Champallier, R, Rushmer, T, Ireland, T, Cronin, S., Are transcrustal magmatic systems petrologically realistic? Lessons from Taranaki, New Zealand. Submitted to Journal of Petrology.
User Contributed Keyword(s):
Taranaki, clinopyroxene, experimental petrology