The Tasmanian Devonian granites were emplaced during the Tabberabberan Orogeny when the East and West Tasmania Terranes were sutured. The primary aim of this study is to determine zircon O and Lu-Hf isotope constraints on, and relationships between, the magmas forming these granites. A second aim is to determine if these zircon isotopic compositions can be used to inform granite-related ore endowment. Several granites (n = 11 in East Tasmania Terrane, n = 1 West Tasmania Terrane) were previously dated by U-Pb geochronology using SHRIMP, and the zircon pits from the dating analyses were targeted firstly in O and later in Lu-Hf isotope analyses. The magmatic zircon δ¹⁸O_VSMOW results ranged from mantle-like values (<5.7‰) to values like supracrustal rocks (∼12‰). The granites with the lowest most mantle-like zircon δ¹⁸O are all I-types, and these include the relatively mafic Lisle to the very felsic and highly fractionated Mt Stronach and Tombstone Creek plutons. The Tombstone Creek zircon εHf_i results are significantly lower than those of Lisle and Mt Stronach, indicating distinct melt sources from which the zircons crystallized. The magmatic zircon δ¹⁸O and εHf_i results revealed two distinct paths of infracrustal to upper crustal rock εHf_i– δ¹⁸O melt evolution: one “high εHf” path linking the results from the Lisle, Mt Stronach, Hazards, Henbury, Lottah, Gipps Creek and Royal George granites, and the other “low εHf” path linking those from Tombstone Creek, Meredith, Poimena, Bicheno and Ansons Bay granites. The paths are statistically different and modeled results are consistent with mixing of Mathinna Supergroup rocks with different isotopically defined infracrustal/mantle-like components. The high εHf group of granites are strongly associated with granite-related Au, Sn, and Sn–W ore deposits.

塔斯马尼亚泥盆纪花岗岩是在 Tabberabberan 造山运动期间，东、西塔斯马尼亚地体被缝合时形成的。本研究的主要目的是确定锆石 O 和 Lu-Hf 同位素对形成这些花岗岩的岩浆的限制以及它们之间的关系。第二个目的是确定这些锆石同位素组成是否可用于告知与花岗岩相关的矿石禀赋。一些花岗岩（东塔斯马尼亚地体中的 n = 11，西塔斯马尼亚地体中的 n = 1）之前使用 SHRIMP 通过 U-Pb 地质年代学进行了测年，测年分析中的锆石坑首先在 O 中定位，然后在 Lu-Hf 同位素分析中定位. 岩浆锆石δ ¹⁸ O _VSMOW结果范围从类似地幔的值（<5.7‰）到类似地壳岩石的值（~12‰）。具有最低最像地幔的锆石δ ¹⁸ O 的花岗岩都是I 型，其中包括相对镁铁质的Lisle 到非常长英质和高度分馏的Mt Stronach 和Tombstone Creek 岩体。Tombstone Creek 锆石 εHf _i结果显着低于 Lisle 和 Mt Stronach 的结果，表明锆石结晶的不同熔体来源。岩浆锆石 δ ¹⁸ O 和 εHf _i结果揭示了地壳下到上地壳岩石 εHf _i – δ ^{18的两条不同路径}O 熔体演化：一条“高 εHf”路径连接来自 Lisle、Mt Stronach、Hazards、Henbury、Lottah、Gipps Creek 和 Royal George 花岗岩的结果，另一条“低 εHf”路径连接来自 Tombstone Creek、Meredith、Poimena 的结果、Bicheno 和 Ansons 湾花岗岩。路径在统计上是不同的，建模结果与 Mathinna 超群岩石与不同同位素定义的地壳/地幔成分的混合一致。高 εHf 花岗岩群与花岗岩相关的 Au、Sn 和 Sn-W 矿床密切相关。