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Dehydration melting of amphibolite at 1.5 GPa and 800-950 degrees C: Implications for the Mesozoic potassium-rich adakite in the eastern North China Craton

文献类型：期刊论文

作者Ye, Zhilin4,5; Wan, Fang1; Jiang, Neng3; Xu, Jingui5; Wen, Yuanyun2; Fan, Dawei5; Zhou, Wenge5
刊名GEOSCIENCE FRONTIERS
出版日期2021-03-01
卷号12期号:2页码:896-906
关键词Amphibolite Partial melting Eastern North China Craton Potassium-rich adakitic rocks Hannuoba granulite xenoliths
ISSN号1674-9871
DOI10.1016/j.gsf.2020.03.008
英文摘要Mesozoic intermediate-felsic magmatic rocks in the eastern North China Craton commonly show geochemical similarity to adakites. However, the lack of direct constraints from partial melting experiments at high pressures and temperatures fuels a debate over the origin of these rocks. In this work, we performed partial melting experiments at 1.5 GPa and 800-950 degrees C on amphibolite samples collected from the vicinity of the Mesozoic potassium-rich adakitic rocks in the Zhangjiakou area, northern margin of the North China Craton. The experimental melts range from granitic to granodioritic compositions, with SiO2 = 56.4-72.6 wt.%, Al-2|O-3 = 16.1-19.3 wt. %, FeO* = 2.4-9.6 wt. %, MgO = 0.3-2.0 wt. %, CaO = 0.6-3.8 wt. %, Na2O = 4.7-5.3 wt.%, and K2O = 2.6-3.9 wt.%, which are in the ranges of the surrounding Mesozoic potassium-rich adakitic rocks, except for the higher Al2O3 contents and the data point a 1.5 GPa and 800 degrees C. Trace element compositions of the melts measured by LA-ICP-MS are rich in Sr (849-1067 ppm) and light rare earth elements (LREEs) and poor in Y (<10.4 ppm) and Yb (<0.88 ppm), and have high Sr/Y (102-221) and (La/Yb)(n) (27-41) ratios and strongly fractionated rare earth element (REE) patterns, whereas no obvious negative Eu anomalies are observed. The geochemical characteristics show overall similarity to the Mesozoic potassium-rich adakitic rocks in the area, especially adakites with low Mg#, again except for the data point at 1.5 GPa and 800 degrees C. The results suggest that partial melting of amphibolite can produce potassium-rich adakitic rocks with low Mg# in the eastern North China Craton under the experimental conditions of 1.5 GPa and 850-950 degrees C. The experimental restites consist of hornblende (Hbl) + plagioclase (P1) + garnet (Grt) +/- clinopyroxene (Cpx), a mineral assemblage significantly different from that of the nearby Hannuoba mafic granulite xenoliths which consist of Cpx + orthopyroxene (Opx) + PI +/- Grt. Chemically, the experimental restites contain higher Al2O3 but lower MgO and CaO than the Hannuoba mafic granulite xenoliths. We therefore argue that the Hannuoba mafic granulite xenoliths cannot represent the direct products of partial melting of the experimental amphibolite.
WOS关键词LOWER CRUSTAL XENOLITHS ; MG-NUMBER SIGNATURE ; CONTINENTAL-CRUST ; MAGNESIAN ANDESITES ; SOLID AMPHIBOLITE ; VOLCANIC-ROCKS ; HIGH-PRESSURE ; 10 KBAR ; ORIGIN ; CONSTRAINTS
资助项目National Natural Science Foundation of China[41772043] ; National Natural Science Foundation of China[41802043] ; Chinese Academy of Sciences "Light of West China" Program ; Youth Innovation Promotion Association CAS[2018434] ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province[[2019] 10]
WOS研究方向Geology
语种英语
WOS记录号WOS:000611950300030
出版者CHINA UNIV GEOSCIENCES, BEIJING
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences "Light of West China" Program ; Chinese Academy of Sciences "Light of West China" Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences "Light of West China" Program ; Chinese Academy of Sciences "Light of West China" Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences "Light of West China" Program ; Chinese Academy of Sciences "Light of West China" Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences "Light of West China" Program ; Chinese Academy of Sciences "Light of West China" Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province ; Innovation and Entrepreneurship Funding of High-Level Overseas Talents of Guizhou Province
源URL[http://ir.iggcas.ac.cn/handle/132A11/100071]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Fan, Dawei
作者单位1.Minco Int Min Consulting Ltd, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Ctr Lunar & Planetary Sci, Inst Geochem, Guiyang 550081, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Geochem, Key Lab High Temp & High Pressure Study Earths In, Guiyang 550081, Peoples R China
推荐引用方式
GB/T 7714		 Ye, Zhilin,Wan, Fang,Jiang, Neng,et al. Dehydration melting of amphibolite at 1.5 GPa and 800-950 degrees C: Implications for the Mesozoic potassium-rich adakite in the eastern North China Craton[J]. GEOSCIENCE FRONTIERS,2021,12(2):896-906.
APA Ye, Zhilin.,Wan, Fang.,Jiang, Neng.,Xu, Jingui.,Wen, Yuanyun.,...&Zhou, Wenge.(2021).Dehydration melting of amphibolite at 1.5 GPa and 800-950 degrees C: Implications for the Mesozoic potassium-rich adakite in the eastern North China Craton.GEOSCIENCE FRONTIERS,12(2),896-906.
MLA Ye, Zhilin,et al."Dehydration melting of amphibolite at 1.5 GPa and 800-950 degrees C: Implications for the Mesozoic potassium-rich adakite in the eastern North China Craton".GEOSCIENCE FRONTIERS 12.2(2021):896-906.

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