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| How High Are the P-T Conditions for Paleoproterozoic Metamorphism of the Huangtuling Felsic Granulite, North Dabieshan, Central China？ | |
| 引用本文： | 陈能松,龚松林,孙敏,杨勇,刘嵘.How High Are the P-T Conditions for Paleoproterozoic Metamorphism of the Huangtuling Felsic Granulite, North Dabieshan, Central China？[J].中国地质大学学报(英文版),2006,17(4):291-301. |
| 作者姓名： | 陈能松 龚松林 孙敏 杨勇 刘嵘 |
| 作者单位： | [1]Faculty of Earth Sciences, China University of Geosciences , Wuhan 430074, China [2]Department of Earth Sciences, The University of Hong Kong , Pok fulam Road, Hong Kong [3]School of Foreign Language, China University of Geosciences , Wuhan 430074, China |
| 基金项目： | the Special Doctoral Grant of the Ministry of Education of China，国家自然科学基金 |
| 摘 要： | This paper is supported by the Special Doctoral Grant of the Ministry of Education of China （No. 98049114） and the National Natural Science Foundation of China （No. 49972023）. |
| 关 键 词： | 变质作用 长英矿物 大别山 找矿方法 |
| 收稿时间： | 2006-07-09 |
| 修稿时间： | 2006-09-25 |
How High Are the P-T Conditions for Paleoproterozoic Metamorphism of the Huangtuling Felsic Granulite,North Dabieshan,Central China? |
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| Chen Nengsong,Gong Songlin,Sun Min,Yang Yong,Liu Rong.How High Are the P-T Conditions for Paleoproterozoic Metamorphism of the Huangtuling Felsic Granulite,North Dabieshan,Central China?[J].Journal of China University of Geosciences,2006,17(4):291-301. | |
| Authors: | Chen Nengsong Gong Songlin Sun Min Yang Yong Liu Rong |
| Institution: | 1. Faculty of Earth Sciences,China University of Geosciences ,Wuhan 430074,China;Department of Earth Sciences,The University of Hong Kong,Pok fulam Road,Hong Kong 2. Faculty of Earth Sciences,China University of Geosciences ,Wuhan 430074,China;School of Foreign Language,China University of Geosciences,Wuhan 430074,China 3. Department of Earth Sciences,The University of Hong Kong,Pok fulam Road,Hong Kong 4. Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074,China |
| Abstract: | The 2.34 cm-wide garnet porphyroblast in the Paleoproterozoic felsic granulite from the Huangtuling area, North Dabieshan, has been reinvestigated for compositional variation in light of Cacomposition X-ray mapping to obtain peak P-T conditions of granulite-facies metamorphism.A new core-rim traverse was conducted through where there is little influence on Ca-profile and slight modification in Mn-, Mg- and Fe-profiles with the highest Mg/(Mg Fe) value of 0.467.Reasonable peak P-T conditions were estimated to be 1.50- 1.70 GPa and 1 100- 1 150 ℃ according to TWQ-based garnetAl-orthopyroxene thermobarometry.These estimations suggest that the Huangtuling granulite once was subjected to ultrahigh-temperature (UHT) granulite-facies metamorphism following a high-pressure granulite-faices metamorphic stage, implying that a deep subduction and collision process relevant to the Yangtze block occurred in the Paleoproterozoic time, probably as a response to the global assembly event of the Columbia supercontinent. |
| Keywords: | close-to peak garnet growth zoning garnet-Opx thermobarometry peak P-T conditions Paleoproterozoic HP-UHT granulite Dabieshan assembly event of supercontinent |
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