煤系黄铁矿在化学计量组成中含有碳的矿物，其表面的含碳量均大于40%。
In terms of chemical computation composition, in minerals with carbon, its surface carbon content is more than 40%.
对河水的化学计量分析表明河水化学组成受碳酸盐岩溶解控制，而碳酸盐岩主要受碳酸和硫酸作用而溶解。
The end-member identification by the intercorrelations between chemical and isotopic ratios shows three main sources, which are derived from weathering of limestone, dolomite and silicates.
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