LOW-TEMPERATURE EXPERIMENTAL INVESTIGATION OF THE EFFECT OF HIGH PH KOH SOLUTIONS ON THE OPALINUS SHALE, SWITZERLAND

被引:67
作者
CHERMAK, JA [1 ]
机构
[1] UNIV BERN,INST MINERAL PETROG,CH-3012 BERN,SWITZERLAND
关键词
EXPERIMENTAL INVESTIGATION; HIGH PH; K-RECTORITE; K-FELDSPAR; OPALINUS SHALE; PHILLIPSITE;
D O I
10.1346/CCMN.1993.0410313
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Batch reactor experiments were performed at 150-degrees-C, 175-degrees-C, and 200-degrees-C to determine the effect of high pH KOH solutions on the mineralogy of the Opalinus shale. In these experiments, the change in solution quench pH at 25-degrees-C, solution composition, and mineralogy were monitored as a function of time for up to almost-equal-to 50 days. Runs were performed in 50 ml titanium hydrothermal reactor vessels. Each reactor was charged with 0.5-5.0 grams of the 80-200 mesh size fraction of Opalinus shale, and 25 ml of solution (0.08 and 0.008 m KOH). Under these high pH conditions, the general sequence of reaction products observed is the formation of phillipsite, followed by K-feldspar +/- K-rectorite. Phillipsite is a metastable intermediate that eventually transforms to K-feldspar. This sequence of mineral reaction products is very different from that found in the NaOH system.
引用
收藏
页码:365 / 372
页数:8
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