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成岩成矿深度的构造校正测算方法 ,是从测算压力中先消除构造附加静水压力之后再计算上覆岩石厚度 ,即成岩成矿深度的方法。该方法建筑在对地壳岩石处于固体应力状态的认识之上 ,采用弹性固体模型代替静止流体模型 ,比沿袭至今单纯用压力 /密度方法得出的深度更符合于实际情况。该文以胶东玲珑 -焦家式金矿床为例 ,介绍了该方法的理论基础和野外地质研究方法——开展变形岩相形迹填图 ,在室内利用三维变形和古差应力测量 ,计算差应力时根据样品所处构造部位和性质 ,选择不同的参数换算成矿时的差应力值。观测统计位错密度时采用“最大位错密度”观测方法 ,给出恢复三维主应力的应力应变方程组 ,利用测算总压力 P和构造附加静水压力 PS的关系 ,P=PS+ PG,取得重力产生的附加静水压力值 PG,根据Terzaghi假设求得成矿深度。
The tectonic correction calculation method of diagenesis and mineralization depth is to calculate the overlying rock thickness, ie, the depth of diagenesis and mineralization, from the measured pressure first eliminating the additional hydrostatic pressure. The method is based on the recognition that the crustal rock is in a state of solid stress. The use of the elastic solid model instead of the static fluid model is more realistic than the depth obtained by simply using the pressure / density method. Taking the Linglong-Jiaojia gold deposit in Jiaodong as an example, this paper introduces the theoretical basis of the method and the field geology research method-carrying out the metamorphic lithofacies mapping, using three-dimensional deformation and paleo-stress measurements in the room to calculate the differential stress According to the sample where the structure and nature of the site, choose different parameters to convert the value of the difference between mineral stress. When observing the statistical dislocation density, the “maximum dislocation density” observation method is adopted to give the stress-strain equation for recovering the three-dimensional principal stress. By using the relationship between the total pressure P and the constructed additional hydrostatic pressure PS, P = PS + PG, Of additional hydrostatic pressure PG, according to Terzaghi hypothesis obtained depth of mineralization.