| An Improved Experimental Calibration of the Olivine-Spinel Geothermometer |
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| 摘 要： | The calibration of the olivine-spinel geothermometer by Fabries(1979) is commonly adopted by a number of petrologists.But the temperatures calculated in this way for ultramafic focks are significantly lower than those obtained by the pyroxene geothermometers.These O1-Sp temperatures are also lower than those measured experi-mentally in the natural system (four-phase lherzolite).Different rates of cation diffusion cannot fully account for these differences.The temperature deviation is actually related to the inconsistencies between natural and experimental data which support the calibration .A re-evaluation of the calibration is proposed on the basis of a set of new experimental data.
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| 关 键 词： | 实验标准 橄榄石-尖晶石地温计 阳离子扩散速率 岩石学 超基性岩 |
An improved experimental calibration of the olivine-spinel geothermometer |
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| Li Jianping,Jacques Kornprobst,Daniel Vielzeuf,Jacques Fabriès. An improved experimental calibration of the olivine-spinel geothermometer[J]. Chinese Journal of Geochemistry, 1995, 14(1): 68-77. DOI: 10.1007/BF02840385 |
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| Authors: | Li Jianping Jacques Kornprobst Daniel Vielzeuf Jacques Fabriès |
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| Affiliation: | (1) Département de Géologie et Minéralogie, URA 10 CNRS, Université Blaise Pascal, 63038 Clermont-Ferrand, France;(2) Present address: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Wushan, Guangzhou;(3) Laboratoire de Minéralogie, Muséum d’Histoire Naturelle de Paris, 75005 Paris, France |
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| Abstract: | The calibration of the olivine-spinel geothermometer by Fabriès (1979) is commonly adopted by a number of petrologists. But the temperatures calculated in this way for ultramafic rocks are significantly lower than those obtained by the pyroxene geothermometers. These O1-Sp temperatures are also lower than those measured experimentally in the natural system (four-phase lherzolite). Different rates of cation diffusion cannot fully account for these differences. The temperature deviation is actually related to the inconsistencies between natural and experimental data which support the calibration. A re-evaluation of the calibration is proposed on the basis of a set of new experimental data. |
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| Keywords: | experimental calibration olivine-spinel geothermometer cation diffusion rate |
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