کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1742805 | 1017735 | 2006 | 15 صفحه PDF | دانلود رایگان |
The rare earth elements (REE) concentrations in the waters of Obuki hot spring, Tamagawa geothermal system, Akita Prefecture, Japan, have been determined in order to investigate their long-term variations over a 30-year period. The temporal patterns of REE and SO42− concentrations are synchronous. Leaching experiments using source rock demonstrated that the relatively high REE concentrations in the waters were likely the result of dissolution of near-surface rocks by the acidic waters. The non-magnetic mineral group, enriched in light rare earth elements (LREE) and Eu(II), is easily attacked by the acid solution. The LREE will be selectively dissolved from the non-magnetic mineral group when the SO42− concentration is increased by SO2 derived from magmatic gases.
Journal: Geothermics - Volume 35, Issue 2, April 2006, Pages 141–155