金厂沟梁-二道沟金矿田内花岗岩类侵入体SHRIMP锆石U-Ph定年结果表明,该区中生代以来到少经历了三次中酸性岩浆侵入作用,它们分别以西台子二长花岗岩、娄上含辉石石英闪长岩和西对面沟花岗闪长岩及闪长玢岩脉在218±4Ma(印支期)、161±1Ma(燕山早期)和126±1Ma(燕山晚期)的侵位为标志。花岗岩类的地球化学资料表明,这些花岗岩类侵入体形成与造山作用有关,为造山后或陆内拉张作用的产物。二道沟矿区成矿前或成矿期闪长玢岩脉的年龄126±1Ma限定了该区金矿化的最大年龄;结合前人有关年代学资料,认为本区金矿化应发生在126～118Ma。这说明金厂沟梁-二道沟金矿田的金矿床与我国胶东、小秦岭和辽东等地区的金矿床是同时形成的,再次证明燕山晚期是中国最重要而广泛的金成矿期。此外,在这些主要的金矿区内,金矿化时间上均具有与各自区内最晚一次花岗质岩浆作用同时或稍晚的特征,这可能指示金矿床是造山作用或区域构造-岩浆演化最晚期的产物。 The SHRIMP zircon U-Ph dating of the Jinchangguliang-Erdaogou gold ore field shows that the Mesozoic magmatic intrusions have undergone three intrusive cycles since the Mesozoic in this area. They are mainly composed of Xitaizi monzogranite, The emplacement of the palygorskite-bearing diorite and western Opposite-dickite diorite and diorite porphyrite at 218 ± 4Ma (Indo-Chinese epoch), 161 ± 1Ma (early Yanshanian) and 126 ± 1Ma (late Yanshanian) As a sign. Geochemical data from granitoids indicate that these granitoids intrusions are associated with orogeny and are products of orogenic or intracontinental tonalism. The age of the dioritic veins before or during mineralization in the Erdaogou Mine Area is 126 ± 1Ma, which limits the maximum age of gold mineralization in the area. According to the previous chronological data, the gold mineralization in this area should occur at 126 ~ 118Ma. This indicates that the gold deposits in the Jindingchang-Erdaogou gold ore field are formed simultaneously with the gold deposits in the Jiaodong, Xiaoqinling and Liaodong areas in our country, proving once again that the late Yanshanian period is the most important and extensive gold-forming period in China. In addition, the timing of gold mineralization in these major gold mines has the same or a lesser degree as the latest granitic magmatism in the respective zones, which may indicate that the gold deposits are either orogenic or regional tectono-magmatic The product of the latest evolution.