The Yaojialing deposit is the first large‐scale Zn–Au–Cu polymetallic skarn deposit located in the Shatanjiao ore field of the Tongling area in the Middle–Lower Yangtze belt. It has distinct metallogenic characteristics and is clearly different from the known skarn Cu–Au deposits in the Tongling area and the Middle–Lower Yangtze belt. Previous studies of the Yaojialing deposit have included rock geochemistry, alteration and mineralization characteristics, as well as metallogenesis and metallogenic models. However, there are still numerous problems concerning the coexistence of multiple elements, metallogenetic specialization of the magma and the metallogenic model. In this study, using the latest production exploration work on the deposit, we investigated the Yaojialing deposit including its geological characteristics, petrography, LA–ICP MS zircon U–Pb dating and whole rock geochemistry. Two kinds of magmatic rocks have been distinguished for the first time in the deposit, amongst which the granodiorite porphyry exposed on the surface of the mining area, which is the host rock of the veined lead–zinc ore body, is the wall‐rock intrusion; and the deep concealed quartz monzonite porphyry is the causative intrusion, the distribution of orebodies and wall‐rock alteration characteristics showing regular zoning around the quartz monzonite porphyry. The ²⁰⁶Pb/²³⁸U weighted average age of the granodiorite porphyry is 140.2 ± 1.0 Ma (MSWD = 0.85, n = 13) by LA–ICP MS zircon U–Pb dating, while the quartz monzonite porphyry is 138.9 ± 1.2 Ma (MSWD = 0.60, n = 16), which is consistent with petrographic evidence. The geochemical characteristics show that the quartz monzonite porphyry is a high‐K calc‐alkaline series peraluminous rock. The trace element characteristics show that the quartz monzonite porphyry is enriched in LILE such as K, Rb, Sr, Ba and LREE, yet depleted in HFSE such as Nb, Ta, P and Ti. The Yaojialing deposit shows the mineralization characteristics of proximal skarn and distal skarn, having the common characteristics of ‘multi‐storey’ and ‘Trinity’ metallogenic models.

中文翻译：

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铜陵区姚家岭多金属矽卡岩矿床成因入侵的地球化学，年代学及新的成因模型研究

姚家岭矿床是长江中下游铜陵地区沙滩角矿田中的首个大型Zn-Au-Cu多金属矽卡岩矿床。它具有明显的成矿特征，并且与铜陵地区和扬子中下游地区已知的矽卡岩型铜金矿明显不同。姚家岭矿床的先前研究包括岩石地球化学，蚀变和矿化特征，以及成矿和成矿模式。然而，关于多种元素的共存，岩浆的成矿特殊性和成矿模式仍然存在许多问题。在这项研究中，我们使用该矿床的最新生产勘探工作，对姚家岭矿床进行了调查，包括其地质特征，岩石学，LA–ICP MS锆石U–Pb测年和整个岩石地球化学。矿床中首次区分出两种岩浆岩，其中暴露于矿区表面的花岗闪长斑岩，即脉状铅锌矿体的主体岩，即围岩侵入体。 ; 深部隐蔽的石英蒙脱石斑岩是致病性侵入体，矿体的分布和围岩蚀变特征表明在石英蒙脱石斑岩周围有规则的分区。的 深部隐蔽的石英蒙脱石斑岩是致病性侵入体，矿体的分布和围岩蚀变特征表明在石英蒙脱石斑岩周围有规则的分区。的 深部隐蔽的石英蒙脱石斑岩是致病性侵入体，矿体的分布和围岩蚀变特征表明在石英蒙脱石斑岩周围有规则的分区。的通过LA–ICP MS锆石U–Pb测年，花岗闪长斑岩的²⁰⁶ Pb / ²³⁸ U加权平均年龄为140.2±1.0 Ma（MSWD = 0.85，n = 13），而石英蒙脱石斑岩的年龄为138.9±1.2 Ma（MSWD = 0.60，n = 16），这与岩石学证据相符。地球化学特征表明，石英蒙脱石斑岩为高钾钙碱性系列高铝质岩。微量元素特征表明石英斑岩斑岩富含LILE，如K，Rb，Sr，Ba和LREE，而富含HFSE，如Nb，Ta，P和Ti。姚家岭矿床显示了上矽卡岩和下矽卡岩的矿化特征，具有“多层”和“三位一体”成矿模式的共同特征。