Reviews on applying common-used geothermobarometers for eclogites.
文献类型：期刊论文
| 作者 | Chen, Y; Ye, K; Wu, CM |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2005-07-01 |
| 卷号 | 21期号:4页码:1067-1080 |
| 关键词 | Eclogite Geothermobarometer Phase Equilibrium Experiment Thermodynamic Data Activity Model |
| ISSN号 | 1000-0569 |
| 文献子类 | Review |
| 英文摘要 | Several geothermobarometers, common-used for P-T estimations of eclogites, have been evaluated through reproducing phase equilibrium experimental data and checking their reliability of thermodynamic activity model. We found that there have five problems in these thermobarometers. (1) In the four versions of common-used garnet-clinopyroxene Fe-Mg exchange thermometer (Ellis and Green, 1979; Powell, 1985; Krogh, 1988; Ravna, 2000), the version of Ravna (2000) yields the smallest absolute error in reproducing the experimental temperatures collected from literatures and thus is the first choice for temperature estimation; (2) These four versions of garnet-clinopyroxene thermometer cannot be used for eclogites with X-Jd > 0.55 in omphacite; (3) The temperatures for ultrahigh-pressure (UHP) phengite-bearing eclogites calculated by the garnet-phengite thermometer of Green and Hellman (1982) are consistent with those obtained by the thermometer of Ravna (2000), suggesting that the thermometer of Green and Hellman (1982) is reliable for UHP eclogites. However, Green and Hellman (1982) garnet-phengite thermometer usually overestimats temperature of high-pressure (HP) phengite-bearing eclogites; (4) The validity of the garnet-clinopyroxene-phengite barometer of Waters and Martin (1993) and the garnet-clinopyroxene-kyanite-phengite-coesite/quartz thermobarometer of Ravna and Terry (2004) is controlled by sodic clinopyroxene activity model as ascribed by Holland (1990). They cannot be applied to eclogites with X-Jd > 0.55 in omphacite. However, Waters and Martin (1996) made an empirical correction for the barometer of Waters and Martin (1993) to remedy the limitation of clinopyroxene activity model, thus it is suitable for eclogites with high jadeite content (X-Jd > 0.55) in omphacite; (5) Nakamura and Banno (1997) used unreliable garnet and hedenbergite activity models in calibrating a thermobarometer for the UHP assemblage garnet-omphacite-kyanite-coesite, this thermobarometer usually yields too much lower pressures. We suggest (1) to combine the barometer of Waters and Martin (1993) and the thermometer of Ravna (2000) for P-T estimation of phengite-bearing eclogites with X-Jd < 0.55 in omphacite; (2) to combine the thermometer of Green and Hellman (1982) and the barometer of Waters and Martin (1996) for P-T estimation of UHP phengite-bearing eclogites with high jadeite content (X-Jd > 0.55) in omphacite; (3) to use the thermobarometer of Ravna and Terry (2004) for UHP kynaite eclogites with X-Jd < 0. 55 in omphacite. Application range, especially the range of X-Ca and Mg-# in garnet and X-Jd in omphacite, must be fully taken into account in applying the thermobarometers. Temperature estimates are strongly affected by Fe3+ contents, thus the Fe3+ contents in garnet and omphacite must be correctly normalized. |
| WOS关键词 | WESTERN GNEISS REGION ; METAMORPHIC EVOLUTION ; PHASE-RELATIONS ; SOLID-SOLUTION ; MICROPROBE ANALYSES ; JADEITIC PYROXENES ; PRESSURE ECLOGITES ; COEXISTING GARNET ; COESITE-ECLOGITE ; DABIE MOUNTAINS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000232291300005 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65728]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen, Y |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Lab Computat Geodynam, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Y,Ye, K,Wu, CM. Reviews on applying common-used geothermobarometers for eclogites.[J]. ACTA PETROLOGICA SINICA,2005,21(4):1067-1080. |
| APA | Chen, Y,Ye, K,&Wu, CM.(2005).Reviews on applying common-used geothermobarometers for eclogites..ACTA PETROLOGICA SINICA,21(4),1067-1080. |
| MLA | Chen, Y,et al."Reviews on applying common-used geothermobarometers for eclogites.".ACTA PETROLOGICA SINICA 21.4(2005):1067-1080. |
入库方式： OAI收割
来源：地质与地球物理研究所
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