During the process of reconnaissance, exploitation, transportation and deposit, a large area around the oil field suffered from serious pollution.
在石油的勘察、开采、运输以及储存过程中，油田周围大面积土壤都受到严重的污染。
2
Suggestions for future thallium pollution protection have been put forward according to present state of Xiangquan thallium mineralized district and possible exploitation of thallium deposit.
针对香泉铊矿化区铊污染的现状和未来铊矿床的开采，提出防治建议。
3
Metal deposit environmental pollution originates from the oxidation and decomposition reaction of metal sulfides , particularly pyrite(FeS 2) and pyrrhotite (FeS).