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众所周知,不同的钙、镁、铁、锰等碳酸盐矿物,可用于解释在一定物理化学条件下所形成之矿物共生组合。象方解石(PH=8—7)、白云石(PH=7—8)、铁白云石(PH>7)和菱铁矿(PH>7)这样一些矿物,尤其是重要的。这些矿物是成矿溶液酸碱度的特殊指示剂,不过要用这些矿物作指示剂,必须用光学方法(折光率、重折率和光性符号的鑑定等)推确鑑定每个矿物。另外,还必须查明矿物在共生组合中的分布规律,与其它矿物的共生类型,并确定其生成顺序。在此基础上,进而判断矿物在析出的过程中矿液所经历的全部变化。在薄片和光片(有些已成功地用于研究手标本和
It is well known that different carbonate minerals such as calcium, magnesium, iron and manganese can be used to explain the symbiosis of minerals formed under certain physicochemical conditions. Some minerals like calcite (PH = 8-7), dolomite (PH = 7-8), iron dolomite (PH> 7) and siderite (PH> 7) are of particular importance. These minerals are special indicators of the pH of mineralization solutions, but using these minerals as an indicator, each mineral must be accurately identified by optical methods (refractive index, birefringence, and identification of light symbols, etc.). In addition, the distribution of minerals in the symbiotic assemblage, the type of symbiosis with other minerals, and the order of their formation must also be identified. On this basis, and then determine the mineral during the precipitation process all the changes experienced. In sheets and sheets of light (some have been used successfully to study hand specimens and