【摘要】 联合使用野外与显微构造调查、断层中方解石微量元素与C-O同位素分析、岩脉中锆石U-Pb定年与广域电磁测深来重建钦杭成矿带中段构造-岩浆成矿的时空演化过程与揭示其成因联系。研究结果表明，存在4期构造变形事件：D₁变形为东西向挤压，D₂变形为从SE向NW的逆冲，D₃变形为NW到SE的伸展事件，伴随着大规模的花岗岩体侵位以及与之有关的钨锡与铜铅锌成矿，D₄变形为成矿后的右型走滑。另外，在野外露头与深部钻孔中发现两期方解石，第二期稀土配分型式主要为LREE富集型，具有低的δ¹⁸OSMOW值（9.78‰～12.3‰），与矿床中方解石的稀土配分型式一致，证实断层中第二期方解石与钨锡和铜铅锌成矿关系密切。广域电磁剖面进一步揭示～5km深度的构造-岩浆岩矿床的几何学特征，花岗岩体的区域断层侵入。推测浅部的钨锡与铜铅锌矿体往深部（1.5～4km）具有稳定的延深。因此，地表调查、地球化学分析与广域电磁测深结合的方法在覆盖区对钨锡与铜铅锌矿床的深部探测十分有效。更多还原

【Abstract】 Field and microscopic structural investigations, trace element and C–O isotopic analyses of calcite, zircon U-Pb dating of dikes, and wide-field electromagnetic sounding are conjointly conducted in the middle part of the Qin-Hang metallogenic belt to decipher the spatial-temporal evolution and genetic relationship of structure-magmamineralization. The data reveal four deformation events: D1 is a W-to-E-thrusting event; D2 is characterized by SE-to-NW thrusting; D3 is a NW-SE-oriented extensional event accompanied by large-scale magma intrusion and W–Sn and Cu–Pb–Zn mineralization; D4 is a dextral strike-slip event after mineralization. Two stages of calcite are identified during D₃ and Stage Ⅱ calcite is characterized by LREE-enriched REE patterns, with low δ¹⁸OSMOW（from 9.78‰ to 12.3‰）, identical to those of calcite in the deposits, confirming that they are closely related to mineralization. Wide-field electromagnetic profiles further display the geometric characteristics of structures, granitic plutons, and orebodies from shallow to deep（～5 km） level. It is believed that some giant concealed W-Sn and Cu-Pb-Zn orebodies are developed in the contact zones between plutons and limestone at a depth of 1.5-4 km. It is reasonable to suggest that this method is feasible for the study on the deep exploration of W-Sn and Cu-Pb-Zn polymetallic deposits.更多还原