| Trace elemental records of short-lived heating during exhumation of the CCSD eclogites |
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| 作者姓名： | ZONG KeQing LIU YongSheng LIU XiaoMing ZHANG BinHui |
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| 作者单位： | [1]State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China [2]State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi＇an 710069, China |
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| 基金项目： | Supported by the Ministry of Scieace and Technology of China （Grant No. 2003CB716501）, the National Natural Science Foundation of China （Grant Nos. 40521001 and 40473013）, the Program for New Ceatury Excelleat Taleats in University （Grant No. NCET-054）664）, the State Key Laboratory of GPMR, China University of Geoscieaces （Grant No. GPMR0511） and the State Key Laboratory of Confineatal Dynamics, Northwest University, China |
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| 摘 要： | Trace element compositions of garnet, omphacite and apatite in ultrahigh-pressure eclogites from the main hole of the Chinese Continental Scientific Drilling (CCSD) project were in situ analyzed by the LA-ICP-MS method. Although both garnet and omphacite have homogeneous major element composi-tions, their trace elements show zonations from core to rim in rare earth elements. In particular, middle rare earth elements in the garnet, heavy rare earth elements in the apatite and all rare earth elements in the omphacite increase from core to rim, respectively. Based on dependence of partition coefficients on temperature and pressure in these minerals, we suggest that the trace elemental zonations in these minerals may record a short-lived heating event during exhumation.
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| 关 键 词： | 中国大陆架科学钻探计划 榴辉岩 痕量元素 现场分析 短暂加热 矿化带 |
| 收稿时间： | 14 January 2006 |
| 修稿时间： | 2006-01-172006-10-01 |
Trace elemental records of short-lived heating during exhumation of the CCSD eclogites |
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| ZONG KeQing LIU YongSheng LIU XiaoMing ZHANG BinHui.Trace elemental records of short-lived heating during exhumation of the CCSD eclogites[J].Chinese Science Bulletin,2007,52(6):813-824. |
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| Authors: | Zong KeQing Liu YongSheng Liu XiaoMing Zhang BinHui |
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| Institution: | (1) State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China;(2) State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an, 710069, China |
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| Abstract: | Trace element compositions of garnet, omphacite and apatite in ultrahigh-pressure eclogites from the main hole of the Chinese Continental Scientific Drilling (CCSD) project were in situ analyzed by the LA-ICP-MS method. Although both garnet and omphacite have homogeneous major element composi- tions, their trace elements show zonations from core to rim in rare earth elements. In particular, middle rare earth elements in the garnet, heavy rare earth elements in the apatite and all rare earth elements in the omphacite increase from core to rim, respectively. Based on dependence of partition coefficients on temperature and pressure in these minerals, we suggest that the trace elemental zonations in these minerals may record a short-lived heating event during exhumation. |
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| Keywords: | eclogite in situ analysis trace element mineral zoning |
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