好像发错地方了，麻烦楼主移一下
文章：Mg/Ca Ration and Salinity:Two controls over crystallization of dolomite,R.L. Folk and L.S. Land, 1975, AAPG
以下是我翻译的中文，请各位高手砸一下。
另这篇文章我翻译了全文，有兴趣的话可以站内信。
1、With a high concentration of Ca, Mg, and CO3 ions, such as exists under evaporitic conditions, a highly oversaturated solution can lose energy by forming the improbable and difficult dolomite structure, or it can lose a smaller, but still substantial amount of energy by crystallizing as the simpler calcite or aragonite structures.
在高浓度的镁离子，钙离子，碳酸根离子环境中，例如在蒸发条件下，高度过饱和的溶液通过形成一些不常见到的白云石结构来降低能量，但是更大量的能量流失是通过结晶形成更简单的方解石、文石来完成的。
2、Rapid crystallization always forces dolomite/calcite boundary to right because of difficulty of ordering dolomite crystal.
由于白云石结晶较难，快速的结晶作用（意味着快速形成和快速消失，译者）通常使白云石和方解石的边界平直。
3、Any carbonate crystallized below siich high Mg/Ca ratios comes out as the easier-to-form aragonite or magnesian-calcite.
在如此高的镁钙比值背景下，任何碳酸盐岩矿物都可以以更加容易形成的文石或者镁方解石的形式析出。
4、We propose that the rapid crystallization rate in lake-bottom sediments, possibly aided by organic withdrawal of CO2, is responsible for dolomite being able to form
only at such high Mg/Ca ratios.
虽然湖水中的镁钙比在1:1到1:3间变化，但在泥岩的孔隙水中该比值却变得更高，这也是原白云石出现的地方。我们认为，湖底沉积物中的快速结晶作用是使镁钙比值变高从而形成白云石的重要因素。这种快速结晶可能受到了有机质吸收CO2的促进作用。
5、Subsurface waters of mainly meteoric derivation,though dilute, have Mg/Ca ppm ratios that approach a limit very close to 1:2 (molar ratios of
0.8 Mg to 1.0 Ca).
由于稀释作用——主要来自大气淡水的地层水，其镁钙比值（ppm）非常接近1:2（摩尔比为0.8镁比1.0钙）。
6、A similar chemical revolution ensues.
相似的化学溶解度做保证（？）。
7、The calcite is younger and is a product of phreatic freshwater diagenesis, on the basis of its coarse crystal size and the fact that large crystals of calcite extend right up to the pore walls without any wall-lining crust of bladed to fibrous calcite
由于方解石晶体粗大，且大的晶体虽超出了孔隙壁但是却没有形成任何沿孔隙壁的叶状到纤维状方解石，因此石方解石是潜流淡水成岩的产物，且形成时间较晚。
8、and in the case of dolomite this probably explains the difficulty workers have experienced and the differing results they have obtained in trying to determine the K^p of the mineral from dissolution experiments and in the interpretation of isotopic fractionation factors
这也解释了工人们所经历的种种困难，以及在Ksp溶解度实验中和在解释同位素分级因素取得的不同结果。（？）
