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| 大兴安岭北部伊列克得组玄武岩的地球化学特征 | |
| 引用本文： | 葛文春,林强,李献华,吴福元,孙德有,尹成孝.大兴安岭北部伊列克得组玄武岩的地球化学特征[J].矿物岩石,2000,20(3):14-18. |
| 作者姓名： | 葛文春 林强 李献华 吴福元 孙德有 尹成孝 |
| 作者单位： | 1. 中国科学院广州地球化学研究所,广州五山,510640;长春科技大学地球科学学院,长春,130026 2. 长春科技大学地球科学学院,长春,130026 3. 中国科学院广州地球化学研究所,广州五山,510640 4. 釜山大学校师范大学地球科学科,韩国釜山,609-735 |
| 基金项目： | 国家自然科学基金（49972027）和国家杰出青年科学基金（49725309）资助项目成果 |
| 摘 要： | 大兴安岭北部伊列克得组玄岩类具有富碱（Ｋ２Ｏ＋Ｎａ２Ｏ〉６．３７％）、高Ｋ２Ｏ（２．６２％～３．１１％），高Ｋ２Ｏ／Ｎａ２Ｏ比值（０．７～０．８）和Ｔｈ／Ｔａ、Ｃｅ／Ｎｂ、Ｔａ／Ｎｂ比值，以及强烈富集大离子亲石元素（ＬＩＬＥ）和轻稀土元素（ＬＲＥＥ）的特征，属于钾玄质系列，低Ｓｒ／Ｎｄ比值（１３～１７．５）的特征类似于洋岛玄武岩，但其Ｔａ／Ｈｆ，Ｔｈ／Ｔａ比值特征及与Ａ型花岗岩共生等特征表明，钾玄 |
| 关 键 词： | 钾玄岩 地球化学 早白垩世 大陆裂谷 玄武岩 |
| 修稿时间： | 2000-03-03 |
GEOCHEMICAL CHARACTERISTICS OF BASALTS OF THE EARLY CRETACEOUS YILIEKEDE FORMATION,NORTH DAXING'ANLING |
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| GE Wen-chun,LIN Qiang,LI Xian-hua,WU Fu-yuan,SUN De-you,YUN Sunghyo.GEOCHEMICAL CHARACTERISTICS OF BASALTS OF THE EARLY CRETACEOUS YILIEKEDE FORMATION,NORTH DAXING'ANLING[J].Journal of Mineralogy and Petrology,2000,20(3):14-18. | |
| Authors: | GE Wen-chun LIN Qiang LI Xian-hua WU Fu-yuan SUN De-you YUN Sunghyo |
| Institution: | GE Wen-chun ; (Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640;College of Earth Sciences, Changchun University of Science and Technology, Changchun 130061); LIN Qiang ; (College of Earth Sciences, Changchun University of Science and Technology, Changchun 130061); LI Xian-hua ; (Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640); WU Fu-yuan ,SUN De-you ; (College of Earth Sciences, Changchun University of Science and Technology, Changchun 130061); YUN Sunghyo ; (Department of Earth Science, College of Education, Pusan National University. Pusan 609 |
| Abstract: | The basalts of early Cretaceous Yiliekede Formation belong to shoshonitic series characterized by rich alkaline (K 2O Na 2O>6.37%), high K 2O(2.62%~3.11%), high ratios of K 2O/Na 2O, Th/Ta, Ce/Nb and Ta/Nb, and strongly enriched in LILE and LREE. The low Sr/Nd ratios (13~17.5) of basalts are similar to those of OIB, but the characteristics of Ta/Hf, Th/Ta and co existance with the A type granites suggest that the shoshonites were formed under the condition of intraplate setting, most likely continental rift.The shoshonitic magma is considered to be the partial melting product of phlogopite bearing lherzolite in the enriched Mesozoic lithospheric mantle. |
| Keywords: | shoshonite Geochemistry Early Cretaceous continental rifting Daxing'anling |
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