Supplementary Data Files to accompany: "U-Pb, Lu-Hf, and trace element zircon data from plutonic rocks of the New England Avalon terrane, USA." (Kuiper, Y.D., Murray, D.P., and Crowley, J.L., 2025)

Zircon εHf(t) values of all samples are -2.8–6.0, with ca. 1.23–0.96 Ga TDM1 Hf model ages. These values are also consistent with published εHf(t) values between -3.1 and 5.9 of nine published plutonic and volcanic rocks. Zircon trace element geochemistry data show mostly mixed continental arc and oceanic island signatures.

The Eu/Eu* values are mostly 0.1–0.7, suggesting ~30–80 km crustal thicknesses. The exception is a sample southeast of the Nauset magnetic anomaly on the southeastern tip of Massachusetts, which has the highest zircon ∑REE values, mostly Nb/Hf >0.001, generally low Eu/Eu* values, and high εHf(t) values, all suggestive of a within-plate/anorogenic/rift setting. The new data provide a valuable reference data set, guiding future studies on the New England Avalon terrane and/or adjacent exotic blocks and on similar crustal domains elsewhere.