Abstract:
The Taupo Volcanic Zone is dominated by silicic magmatism, usually attributed to intense AFC processing within the crust. However, isotopic data shows a sub-linear behaviour in all isotope systems here presented and instead suggest that they are the result of a binary mixing between two endmembers: the subarc mantle wedge and a crustal material. This mixture is inconsistent with intense crustal assimilation due to variations seen in the isotopic characteristics of the New Zealand crust. Instead, this mixing may be occurring subcrustally by interactions between tectonically eroded forearc material and the subarc mantle wedge. International Ocean Discovery Program (IODP) Expedition 372B/375 drilled into the Hikurangi margin in a perpendicular transect, greatly increasing the information and availability of material from the subducting plate and accretionary prism. Here we report Sr-Pb-Nd-Hf data for samples from this expedition along with TVZ samples.
How to cite this dataset:
Corella-Santa-Cruz, C. R., Zellmer, G. F., Stirling, C. H., Straub, S. M., Reid, M., Martin, C., Brenna, M., Nemeth, K., Barr, D., 2025. Sr-Pb-Nd-Hf isotope data for the Taupo Volcanic Zone and Hikurangi margin, New Zealand, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA).
https://doi.org/10.60520/IEDA/113398. Accessed 2025-02-22.
Related
Publication(s):
Corella Santa Cruz, C.R., Straub, S.M., Zellmer, G.F., Stirling, C.H., Reid, M.R., Barr, D., Martin, C., Brenna, M., Németh, K., 2023. Geochemical and isotopic characterisation of trench sediment at the Hikurangi Margin from IODP sites U1518 and U1520. New Zealand Journal of Geology and Geophysics;
Corella Santa Cruz, C.R., Zellmer, G.F., Stirling, C.H., Straub, S.M., Brenna, M., Reid, M.R., Németh, K., Barr, D., 2023. Transcrustal and source processes affecting the chemical characteristics of magmas in a hyperactive volcanic zone. Geochimica et Cosmochimica Acta 352, 86-106;
TO BE SUBMITTED: Carlos R. Corella Santa Cruz; Georg F. Zellmer; Claudine H. Stirling; Susanne M. Straub; Malcolm R. Reid; Candace E. Martin; Marco Brenna; Karoly Nemeth, David Barr. Forearc recycling and a missing slab component in the Taupo Volcanic Zone, New Zealand: insights from Sr-Pb-Nd-Hf isotope systematics of the Hikurangi margin. JPet Letter
Keyword(s):
Coverage Scope: Regional (Continents, Oceans)
Geographic Location: New Zealand, Taupo Volcanic Zone, TVZ, Hikurangi margin
User Contributed Keyword(s):
isotopes, geochemistry, crustal recycling, mantle, crust