An empirical model of Cl and Mo fluid/melt partitioning in felsic upper-crustal magmatic-hydrothermal systems: The effects of fluid salinity and silicate melt composition

This dataset is part of the supplement of Gennaro et al. (2025) under the same title. The dataset provides raw output from electron microprobe analyses (EPMA), output from the SILLS software to quantify data following laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and integrated areas of water bands in selected samples analyzed using Raman spectroscopy. All data comes from a suite of experimental glasses (Table S1) and corresponding synthetic fluid inclusions (Table S2). The full methodology of each analytical technique can be found in the corresponding manuscript. These data are used to determine the effect of melt aluminum saturation index (ASI) and fluid Cl concentration on the fluid/melt partitioning behaviour of Mo and Cl.

Table S1: A compilation of measurements performed on run product glasses for all experiments. Each Excel sheet represents a different experiment and consists of three tables labelled a–c or a–d. Table a is composed of EPMA measurements on major elements, reported here as oxides. Table b provides Cl concentrations as determined by using EPMA on different spots than those analyzed for major elements. Table c gives the concentrations of Na2O, trace elements, and the distance of each measurement point from the rim of the run product glass measured using LA-ICP-MS. Values highlighted in red are not considered as part of the mean concentration of their corresponding element. These values were filtered on the basis of distance from the rim or, occasionally, contamination due to micro-inclusions or unseen quench crystals in the glass. Table d, if included, contains one column listing the integrated area of the water peak of each Raman signal collected. The second column displays the calculated water concentration in the glass using the equation derived from measurements of standards. Rhyolitic glass standards containing 2 and 5 wt% H2O yielded integrated areas of 197265 ± 13055 and 499405 ± 28652 (1σ error; 6 spectra each) respectively, yielding a calibration curve of with an R2 coefficient of 1.
Table S2: A compilation of individual LA-ICP-MS analyses of synthetic fluid inclusions from all experiments. The very few (<5%), easily identifiable outliers shown in red were not considered as part of the mean of their corresponding element concentration on the basis of the poor quality of the LA-ICP-MS signal. Poor signals and outlier behaviour were caused by fracturing of quartz upon ablation, ambiguous signal spikes, or abnormally large signal tails resulting from contamination in the quartz matrix along microfractures or sub-microscopic necking which were not visible petrographically.

本数据集为Gennaro等人2025年同名研究补充材料的一部分。本数据集包含电子探针显微分析（electron microprobe analyses, EPMA）的原始输出结果、用于定量激光剥蚀电感耦合等离子体质谱法（laser ablation inductively coupled plasma mass spectrometry, LA-ICP-MS）测试数据的SILLS软件输出结果，以及经拉曼光谱法分析的选定样品中水谱带积分面积。所有数据均来自一组实验玻璃（附表S1）及对应的合成流体包裹体（附表S2）。各项分析技术的完整方法可参见对应研究论文。本数据集用于探究熔体铝饱和指数（melt aluminum saturation index, ASI）与流体氯浓度对钼（Mo）及氯的流体/熔体分配行为的影响。

附表S1：所有实验的实验产物玻璃测试数据汇编。每个Excel工作表对应一个独立实验，包含a~c或a~d三个数据表。表a为常量元素的电子探针显微分析结果，以氧化物形式呈报。表b为通过电子探针显微分析（与常量元素测试点位不同）测得的氯浓度。表c给出了氧化钠（Na₂O）浓度、微量元素浓度，以及采用激光剥蚀电感耦合等离子体质谱法测得的各测试点距实验产物玻璃边缘的距离。标红的数值不计入对应元素的平均浓度计算，此类数值基于测试点距玻璃边缘的距离，或是玻璃中存在微包裹体、未被观测到的淬火晶体导致的污染情况进行了过滤。表d（若包含）包含两列数据：第一列为各拉曼信号的水峰积分面积；第二列为基于标准样品测试推导的公式计算得到的玻璃中水浓度。含2 wt%和5 wt% H₂O的流纹岩玻璃标准样品的积分面积分别为197265 ± 13055和499405 ± 28652（1σ误差，每组各6条谱线），据此得到的校准曲线决定系数R²为1。

附表S2：所有实验的合成流体包裹体的单次激光剥蚀电感耦合等离子体质谱法测试数据汇编。仅占比不足5%的少量、易于识别的红色异常值，因激光剥蚀电感耦合等离子体质谱法信号质量不佳，未被计入对应元素浓度的平均值计算。信号质量差及异常值产生的原因为：剥蚀过程中石英碎裂、信号尖峰模糊不清，或是因石英基质微裂隙或亚微观颈缩处存在污染导致的异常大信号尾迹，此类污染在岩相学观测中无法被识别。