Supplemental Material: High thermal gradient continental subduction initiated by back-arc collapse – evidence from remote south-west Tasmania

<b>Supplementary material for Brown (2024), PhD thesis - Chapter 8 - </b><b>High thermal gradient continental subduction initiated by back-arc collapse – evidence from remote south-west Tasmania</b>Extended methods.<b>Figure S1.</b> Extended mineral equilibria forward modelling results. Clinoamphibole is excluded from equilibria calculations. (a) <i>P</i><i>–T</i> pseudosection for the bulk-rock composition of sample NB-64, calculated at H₂O-saturated conditions. The dashed white line indicates garnet stable (up-pressure). (b) <i>P–T</i> pseudosection for an effective bulk-rock composition of sample NB-64, excluding garnet core compositions. The dashed white line is the solidus. The chemical system used for all calculations is MnNCKFMASHTO. V signifies the variance of each mineral assemblage.<b>Table S1.</b> Representative EPMA results for solid solution minerals. Major element oxide compositions are given in wt%.<b>Table S2.</b> Ti-in-quartz thermometry results. Ti (ppm) concentrations acquired using EPMA. Temperatures calculated using the calibration of Osborne et al. (2022).<b>Table S3.</b> Additional details for laser-ablation and ICP–MS instruments used in this study.<b>Table S4.</b> LA–ICP–MS major element and REE results for garnet. Elemental data is provided for synthetic glass standards GSG-1G and NIST-610. Eu/Eu* calculation is provided below Table. (bd) signifies below detection.<b>Table S5.</b> LA–ICP–MS/MS Lu–Hf isotope results for apatite and garnet. Major and trace-element data for a small selection of isotopes is provided. Data is also provided for primary reference material NIST-610, 'pseudo-primary' reference materials OD306 and Hogsbo, and secondary reference materials Bamble and Black Point. (Sm/Ce)_N values given for apatite unknowns (right of table). Normalisation values (chondrite) from Sun and McDonough (1989).<b>Table S6.</b> LA–ICP–MS U–Pb isotope results for rutile. Major and trace-element data for a small selection of isotopes is provided. Data is also provided for rutile standards R10 and R19, and for synthetic glass standard NIST-610. Zr-in-rutile temperatures calculated using the calibration of Tomkins et al. (2007). A pressure of 18 kbar was used.

<b>布朗（2024）博士学位论文补充材料——第8章：弧后塌陷引发的高热梯度大陆俯冲——来自塔斯马尼亚西南部偏远地区的证据</b>
扩展方法。
<b>补充图S1</b>：扩展矿物平衡正演模拟结果。计算过程未纳入单斜闪石的平衡计算。(a) 样品NB-64全岩成分的压力-温度（P-T）拟截面图，计算条件为饱和水（H₂O）环境，白色虚线代表石榴石稳定域（压力轴向上）。(b) 样品NB-64的有效全岩成分（剔除石榴石核部成分）的压力-温度拟截面图，白色虚线为固相线。所有计算采用的化学体系为MnNCKFMASHTO，符号V代表各矿物组合的自由度。
<b>补充表S1</b>：固溶体矿物的电子探针显微分析（EPMA）代表性结果。主量元素氧化物组分以重量百分比（wt%）给出。
<b>补充表S2</b>：石英中钛含量测温结果。采用电子探针显微分析测得钛元素质量分数（ppm），测温校准采用Osborne等人（2022）的标定方法。
<b>补充表S3</b>：本研究使用的激光剥蚀电感耦合等离子体质谱（ICP-MS）仪器详细参数补充信息。
<b>补充表S4</b>：石榴石的激光剥蚀电感耦合等离子体质谱（LA-ICP-MS）主量元素与稀土元素（REE）分析结果。同时提供合成玻璃标准物质GSG-1G与NIST-610的元素数据。表后附Eu/Eu*值的计算方法。符号(bd)代表检测限以下。
<b>补充表S5</b>：磷灰石与石榴石的激光剥蚀电感耦合等离子体质谱/串联质谱（LA-ICP-MS/MS）Lu-Hf同位素分析结果。仅列出部分同位素的主量与微量元素数据，同时提供一级参考物质NIST-610、“准原生”参考物质OD306与Hogsbo，以及二级参考物质Bamble与Black Point的数据。表右侧列出磷灰石待测样品的(Sm/Ce)ₙ值。标准化值（球粒陨石）取自Sun与McDonough（1989）的研究。
<b>补充表S6</b>：金红石的激光剥蚀电感耦合等离子体质谱U-Pb同位素分析结果。仅列出部分同位素的主量与微量元素数据，同时提供金红石标准物质R10与R19，以及合成玻璃标准物质NIST-610的数据。采用Tomkins等人（2007）的标定方法计算金红石中锆含量对应的测温结果，计算时采用18 kbar的压力条件。