Structural network studies could give appropriate opportunities to understanding structural/hydrothermal events, transportation of ore-forming fluids and water/rock interaction process. Four structural deformation/hydrothermal events have been identified in the Jiaojia fault zone according to microtexture and deformation of quartz and feldspars. Plagioclase experienced ductile deformation period with bended polysynthetic twin stripes (>450 °C) in the early stage, followed by K-feldspar alteration period with ductile-brittle deformation and subgrain rotation recrystallization of quartz (380–450 °C). Then, sericitization period occurred extensive ductile-brittle deformation (350–420 °C) and extensive subgrain rotation recrystallization with a little bulging recrystallization in quartz. In the last, gold precipitation-related pyrite-sericite-quartz alteration was dominated by brittle deformation (300–380 °C) and total bulging recrystallization of quartz. From the K-feldspar alteration zone and sericitization zone to pyrite-sericitequartz alteration zone, fractal dimension values of dynamically recrystallized quartz grains increase from 1.07 and 1.24 to 1.32, the calculated paleo strain rate values of dynamically recrystallized quartz range from 10^−10.7 (380 °C)−10⁻⁹⁶ (450 °C) and 10^−9.3 (350 °C)−10⁻⁸² (420 °C) to 10^−9.5 (300 °C)−10⁻⁸⁰ (380 °C), and the paleo differential stress values increase from 36.9 and 39.3, to 121.3 MPa. The increase of fractal dimension values and decrease of grain size from pyrite-sericite-quartz alteration zone and sericitization zone to K-feldspar alteration zone decreased average water/rock ratio values, which could lead to different acidity and redox conditions of ore-forming fluids and mineralization differences. Two kinds of orecontrolling fractures have been distinguished which include the gentle dip types (18°–50°) with NW (315°–355°) and SW (180°–235°) dip hosting No. I orebodies and the steep dip types (74°–90°) with NE (45°–85°) and SE (95°–165°) dip hosting No. III orebodies. These faults/fractures crosscut altered Linglong granite of footwall of the Jiaojia fault zone as rhombohedrons that promoted the connection between fractures in the K-feldspar alteration zone and fluid flow passages near the main fault face. Research results indicate No. I and No. III orebodies should be derived from the same mineralization event and belong to different orebody types in different mineralization sites under the same structural networks.

中文翻译：

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胶东半岛胶家金矿床蚀变及成矿过程的结构网络约束

结构网络研究可以为了解结构/热液事件，成矿流体的运输以及水/岩石相互作用过程提供适当的机会。根据石英和长石的显微组织和变形，在胶家断裂带发现了四个结构变形/热液事件。斜长石在早期经历了弯曲的多合成双条纹（> 450°C）的延性变形期，随后是钾长石蚀变期，具有延性-脆性变形和石英的亚晶粒旋转重结晶（380-450°C）。然后，浆化期发生了广泛的韧性脆性变形（350-420°C）和广泛的亚晶粒旋转再结晶，而石英中的鼓胀再结晶很少。在最后，与金沉淀有关的黄铁矿-绢云母-石英蚀变主要由脆性变形（300-380°C）和石英的总鼓胀重结晶引起。从钾长石蚀变带和绢云母化带到黄铁矿-绢云母石英蚀变带，动态再结晶石英晶粒的分形维数值从1.07和1.24增加到1.32，动态再结晶石英的古应变率值计算为10^-10.7（380°C）−10 ⁻⁹⁶（450°C）和10 ^−9.3（350°C）−10 ⁻⁸²（420°C）至10 ^−9.5（300°C）−10 ⁻⁸⁰（380°C），古微分应力值从36.9和39.3增加到121.3 MPa。从黄铁矿-绢云母-石英蚀变带和绢云母化带到钾长石蚀变带的分形维数增加和晶粒尺寸减小，平均水/岩石比值降低，这可能导致成矿流体的酸度和氧化还原条件不同。和矿化差异。区分出两种控矿裂缝，包括轻度倾角类型（18°–50°），西北倾角（315°–355°）和西南倾角（180°–235°），其中I类矿体和陡倾类型（74°–90°），NE（45°–85°）和SE（95°–165°）浸入III号矿体。这些断层/裂缝横切面改变了胶家断裂带下盘面的玲珑花岗岩，成为菱面体，促进了钾长石蚀变带中的裂缝与主断面附近的流体通道之间的联系。研究结果表明，一号和三号矿体应源于同一矿化事件，在同一构造网络下，在不同矿化位点属于不同矿体类型。