Trace element composition of hydrothermal quartz reflects the P-T-X conditions of the mineralizing fluids and can be a potential tracer of the fluid evolution. To explore this potential, quartz trace element data from 21 porphyry Cu-(Au-Mo) and epithermal polymetallic deposits were compiled. In addition, quartz trace element data from six granite-related systems (granite, pegmatite, greisen, Sn-W-Mo veins) and from a subset of calc-alkaline arc-related volcanic rocks were also compiled for comparison. For porphyry Cu-(Au-Mo) deposits, quartz compositions are from publications in which the sequence of quartz-bearing veins and their potential reopening were documented as well as their precipitation temperatures and pressures. The compiled dataset shows that trace element composition of quartz continuously evolved between the different porphyry veins and quartz generations (A, B, C, D, and E). The observed evolution reflects the cooling and/or compositional variations of the hydrothermal fluids. The quartz Al/Ti, Sb/Ti, Ge/Ti, and (Sb+Ge)/Ti ratios allow for the discrimination of quartz from different vein generations of porphyry Cu-(Au-Mo) deposits. This study shows that quartz composition preferentially combined with cathodoluminescence images is an efficient proxy for tracing the evolution of the hydrothermal fluids in porphyry systems and can be used as a vectoring tool to target the centers of porphyry systems.

中文翻译：

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斑岩系统石英的微量元素组成：矿化流体演化的示踪剂

热液石英的微量元素组成反映了矿化流体的 PTX 条件，可以作为流体演化的潜在示踪剂。为了探索这种潜力，我们收集了来自 21 个斑岩铜（Au-Mo）和超热液多金属矿床的石英微量元素数据。此外，还汇编了来自六个花岗岩相关系统（花岗岩、伟晶岩、greisen、Sn-W-Mo 脉）和钙碱性弧相关火山岩子集的石英微量元素数据以进行比较。对于斑岩 Cu-(Au-Mo) 矿床，石英成分来自出版物，其中记录了含石英脉的序列及其重新开放的可能性，以及它们的降水温度和压力。编译后的数据集显示，石英的微量元素组成在不同的斑岩脉和石英世代（A、B、C、D 和 E）之间不断演变。观察到的演化反映了热液流体的冷却和/或成分变化。石英 Al/Ti、Sb/Ti、Ge/Ti 和 (Sb+Ge)/Ti 比率允许区分来自斑岩 Cu-(Au-Mo) 矿床不同脉代的石英。这项研究表明，石英成分优先与阴极发光图像相结合，是跟踪斑岩系统中热液流体演化的有效代表，可用作定位斑岩系统中心的矢量工具。石英 Al/Ti、Sb/Ti、Ge/Ti 和 (Sb+Ge)/Ti 比率允许区分来自斑岩 Cu-(Au-Mo) 矿床不同脉代的石英。这项研究表明，石英成分优先与阴极发光图像相结合，是跟踪斑岩系统中热液流体演化的有效代表，可用作定位斑岩系统中心的矢量工具。石英 Al/Ti、Sb/Ti、Ge/Ti 和 (Sb+Ge)/Ti 比率允许区分来自斑岩 Cu-(Au-Mo) 矿床不同脉代的石英。这项研究表明，石英成分优先与阴极发光图像相结合，是跟踪斑岩系统中热液流体演化的有效代表，可用作定位斑岩系统中心的矢量工具。