| 四川华蓥偏岩子晚二叠世玄武岩地球化学特征及其与峨眉山大火成岩省的成因关系 |
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| 引用本文： | 刘冉,李亚,赵立可,王尉,李宏博,李常权,李博通.四川华蓥偏岩子晚二叠世玄武岩地球化学特征及其与峨眉山大火成岩省的成因关系[J].岩石矿物学杂志,2022,41(1):1-17. |
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| 作者姓名： | 刘冉 李亚 赵立可 王尉 李宏博 李常权 李博通 |
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| 作者单位： | 中国石油大学（北京）地球科学学院;中国石油西南油气田分公司勘探开发研究院;中国地质大学（北京）中国地质大学地质过程与矿产资源国家重点实验室;中国地质博物馆 |
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| 基金项目： | “十三五”国家重大专项(2016ZX05007004);中国石油西南油气田公司科技重大专项(2019ZD01)。 |
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| 摘 要： | 四川华蓥偏岩子地区位于四川盆地中东部,新发现的晚二叠世玄武岩介于茅口组(下伏)和龙潭组(上覆)之间,可与峨眉山玄武岩进行对比.矿物学和地球化学研究表明,偏岩子玄武岩属于高钛亲碱性系列,具有OIB型的稀土元素和微量元素配分模式.偏岩子玄武岩基本未遭受地壳混染,单斜辉石的结晶温度为1405～1439℃,指示源区存在异常高温...
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| 关 键 词： | 地球化学 峨眉山大火成岩省 玄武岩 地幔柱 四川偏岩子 |
| 收稿时间： | 2021/6/11 0:00:00 |
Geochemical characteristics of the Late Permian basalts in Pianyanzi, Huaying, Sichuan and their genetic relationship with Emeishan Large Igneous Province |
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| LIU Ran,LI Y,ZHAO Li-ke,WANG Wei,LI Hong-bo,LI Chang-quan,LI Bo-tong.Geochemical characteristics of the Late Permian basalts in Pianyanzi, Huaying, Sichuan and their genetic relationship with Emeishan Large Igneous Province[J].Acta Petrologica Et Mineralogica,2022,41(1):1-17. |
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| Authors: | LIU Ran LI Y ZHAO Li-ke WANG Wei LI Hong-bo LI Chang-quan LI Bo-tong |
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| Institution: | (College of Geosciences,China University of Petroleum,Beijing,102249,China;Exploration and Development Research Institute,PetroChina Southwest Oil&Gasfield Company,Chengdu 610041,China;State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China;Geological Museum of China,Beijing 100034,China) |
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| Abstract: | Huaying Pianyanzi area is located in the middle-east of Sichuan Basin.The newly discovered Pianyanzi Late Permian basalt is between Maokou Formation(underlying)and Longtan Formation(overlying),which can be compared with Emeishan basalt.The study of petrology,mineralogy and geochemistry suggests that Pianyanzi basalts belong to the high-Ti alkaline series,and the rare earth element(REE)and trace element patterns are similar to those typically found in ocean island basalts(OIB).The basalts have not undergone any significant crustal contamination.The crystallization temperature of clinopyroxene is estimated to be 1405~1439℃,suggesting anomalously thermal inputs from a mantle source and a possible plume-head origin.The REE simulation result su-ggests that Pianyanzi basalts were produced by small degree of partial melting of Emeishan mantle plume within the garnet-spinel transition region.In general,the Pianyanzi Late Permian basalt is very similar to the Emeishan basalt,especially the basalt in the east of Emeishan Large Igneous Province(ELIP),which is an integral part of ELIP. |
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| Keywords: | geochemistry Emeishan Large Igneous Province basalt mantle plume Pianyanzi Sichuan |
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