Experimental Study of Fe-Mg Exchange Reaction Between Orthopyroxene and Sapphirine and its Calibration as a Geothermometer
Experimental Study of Fe-Mg Exchange Reaction Between Orthopyroxene and Sapphirine and its Calibration as a Geothermometer
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斜方辉石与蓝宝石铁镁交换反应的实验研究及其地温计标定
DOI：
10.1016/s1342-937x(05)70909-6
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发表时间：
2002
影响因子：
6.1
通讯作者：
Kei Sato
中科院分区：
文献类型：
--
作者：
Toshisuke Kawasaki;Kei Sato
在压力7-16 kbar、温度850-1300°C条件下，用活塞柱装置研究了Fe ~（2+）和Mg ~（2+）在合成体系和天然体系中的交换。该反应是温度依赖性的，将是一个很好的地质温度计。平衡温度T用分配系数近似表示如下：T（℃）=1515/（ln KD+0.943）-273。这一经验方程被应用于南极麻粒岩和相关岩石。新的斜方辉石-石榴石地质温度计给出了与铁镁斜方辉石-石榴石地质温度计一致的结果。
The exchange of Fe2+and Mg2+between orthopyroxene and sapphirine has been investigated at pressures 7-16 kbar and temperatures 850-1300°C using a piston cylinder apparatus for the synthetic and natural systems. This reaction is temperature-dependent and would be a good geothermometer. The equilibration temperature T is approximately expressed by the distribution coefficient as follows: T(°C)=1515/(ln KD+0.943)-273. This empirical equation was applied to some Antarctic granulites and associated rocks. The new orthopyroxene-sapphirine geothermometer gives consistent results with those estimated from the Fe-Mg orthopyroxene-garnet geothermometer.