| Composition of Phengites in Eclogites and Their Retrogressive Derivatives of the Dabieshan Region：Implication for the Applicability of Phengite Geobarometre |
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| 引用本文： | 顾连兴,杜建国,翟建平,范建国,赵成浩,张文兰.Composition of Phengites in Eclogites and Their Retrogressive Derivatives of the Dabieshan Region：Implication for the Applicability of Phengite Geobarometre[J].中国地球化学学报,2002,21(1):52-56. |
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| 作者姓名： | 顾连兴 杜建国 翟建平 范建国 赵成浩 张文兰 |
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| 作者单位： | [1]DepartmentofEarthSciences,StateKeyLaboratoryforMineralDepositResarch,NanjingUniversity,Nanjing210093,China [2]AnhuiAcademyofGeologicalSurvey,Hefei230001,China |
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| 摘 要： | Phengites in ecologites of the Dabieshan region can be divided into three enerations:primary phengite formed during ecologite-facies prograde metamorphism(Phel),phengite formed during the late stage of eclogite-facies retrograde metamorphism(Phe2)and phengite formed during amphibolite-to greenschist-facies diaphthoresis(Phe3).Electron microprobe analyses show that the Si and Fe^2 Mg contents of Phel are unexpectedly lower than those of Phe3.Therefore,much caution should be exerciesed while using the Si content of phengite to estimate the pressure of a retrograde process.
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| 关 键 词： | 榴辉岩 地球大气压力 大别山 多硅白云母 镁离子 铁离子 |
Composition of phengites in eclogites and their retrogressive derivatives of the Dabieshan region: Implication for the applicability of phengite geobarometre |
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| Gu Lianxing,Du Jianguo,Zhai Jianping,Fan Jianguo,Zhao Chenghao,Zhang Wenlan.Composition of phengites in eclogites and their retrogressive derivatives of the Dabieshan region: Implication for the applicability of phengite geobarometre[J].Chinese Journal of Geochemistry,2002,21(1):52-56. |
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| Authors: | Gu Lianxing Du Jianguo Zhai Jianping Fan Jianguo Zhao Chenghao Zhang Wenlan |
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| Institution: | (1) Department of Earth Sciences, State Key Laboratory for Mineral Deposit Research, Nanjing University, 210093 Nanjing, China;(2) Anhui Academy of Geological Survey, 230001 Hefei, China |
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| Abstract: | Phengites in ecologites of the Dabieshan region can be divided into three generations: primary phengite formed during ecologite-facies
prograde metamorphism ( Phe1), phengite formed during the late stage of eclogite-facies retrograde metamorphism (Phe2) and
phengite formed during amphibolite-to greenschist-facies diaphthoresis ( Phe3). Electron microprobe analyses show that the
Si and Fe2+ + Mg contents of Phel are unexpectedly lower than those of Phe3. Therefore, much caution should be exercised while using
the Si content of phengite to estimate the pressure of a retrograde process.
This research was financially supported by Key Project No. 9501102-04-01 of Ministry of Geology and Mineral Resources and
by State Key Laboratory of Ore Genesis, Nanjing University. |
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| Keywords: | phengite eclogite geobarometre Dabieshan |
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