摘要
峪耳崖金矿是冀东幔枝构造外围主拆离带上盘盖层中 ,受反向铲状断层和次级拆离带共同控制的典型金矿。突出表现为复合构造控制燕山期花岗质岩体呈塔状展布 ,而次级拆离带的持续拆离滑脱使成岩后的岩床状花岗岩产生一系列缓倾裂隙 ,并成为主成矿期的主要储矿构造扩容带。文中探讨了冀东地区地质演化过程 ,分析了区域成矿构造特征 ,总结了成矿作用机理 ,归纳了成矿模式。认为深部找矿仍有较大远景。
The Yuerya gold deposit is a typical deposit in the hanging wall of the main detachment belt around East Hebei mantle branch.The gold deposit is controlled by antithetic listric faults and subsidiary detachment belts.Yanshanian granite bodies controlled by complex structures are characterized by tower_like distribution.Owing to successive activities of the subsidiary detachment belts,postdiagenetic granitic sill formed a series of low_angle fractures,which became the main structural expanding and ore_hosting belt in the major mineralization period.Geological evolutionary process and regional ore_forming structural characteristics are discuissed in this paper.On the basis of detailed studies,the ore_forming mechanism and the metallogenic mechanism are summarized.It is considered that fine ore_hunting prospects remain existent at depth.
基金
地矿部百名跨世纪科技人才培养计划项目!97 0 8
河北省计委项目!98 39资助
关键词
地幔热柱
幔枝构造
控矿构造
成矿机理
金矿床
mantle plume mantle branch ore_controlling structure metallogenic mechanism east Hebei
