The data presented here were previously published in Quandt et al. (2018, 2019, 2020). This data compilation comprises isotopic compositions (δ¹⁸O, δ¹³C, Δ₄₇, ⁸⁷Sr/⁸⁶Sr), rare earth element and yttrium concentrations, and fluid inclusion homogenization temperatures of calcite, quartz, and analcime veins from the Troodos ophiolite and Izu-Bonin forearc/rear arc. These data provide the basis for a comparative study on postmagmatic veining in suprasubduction zone crust.