Journal
ARABIAN JOURNAL OF GEOSCIENCES
Volume 7, Issue 10, Pages 3973-3982Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s12517-013-1057-4
Keywords
Hydrogeochemistry; Groundwater resources; Major ion chemistry; Water-rock interaction; Mineral weathering
Categories
Funding
- Doctor Postgraduate Technical Project of Chang'an University [2013G5290002, CHD2011ZY022]
- Special Fund for Basic Scientific Research of Central Colleges [CHD2011ZY020, CHD2012TD003]
- National Natural Science Foundation of China [41172212]
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Prior to mining, the water in and around the mine is rarely influenced by human activities, and hydrogeochemical processes are the major factors influencing and controlling water chemistry. To identify these natural hydrogeochemical processes in Laoheba phosphorite mine (Sichuan Province, China), correlation and multivariate statistical techniques were used. Results show that water quality in the area is generally good before the Laoheba phosphorite mine goes into construction and production. The cluster analysis classified water samples into 4 clusters (C1-C4). Samples from C1 and C2 are of HCO3-Ca center dot Mg and HCO3-Ca type, while those from C3 and C4 are of HCO3-Ca center dot Mg type. Most parameters except Cl- and pH show an increasing trend in the order of C1 to C4. Three principal components were extracted, and PC1 represents the ion exchange and the weathering of calcite, dolomite, and silicate minerals. PC2 and PC3 indicate the process of water recharge from upstream waters and the process of evaporation, respectively. The hydrochemistry of waters in the area is a result of multiple factors, and natural mineral weathering and ion exchange are the most important ones.
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