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| 松辽盆地早白垩世火山岩地球化学特征及其构造意义 | |
| 引用本文： | 宋立忠,赵泽辉,焦贵浩,孙平,罗霞,姜晓华,王志宏,曾富英,缪卫东. 松辽盆地早白垩世火山岩地球化学特征及其构造意义[J]. 岩石学报, 2010, 26(4): 1182-1194 |
| 作者姓名： | 宋立忠 赵泽辉 焦贵浩 孙平 罗霞 姜晓华 王志宏 曾富英 缪卫东 |
| 作者单位： | 1. 中国石油大学(北京)资源与信息学院,北京,102249;中国石油吉林油田公司,松原,138000 2. 中国石油勘探开发研究院廊坊分院,廊坊,065007 3. 中国地质大学(北京)能源学院,北京,100083 |
| 基金项目： | 国家科技重大专项(2008ZX05007-006)资助 |
| 摘 要： | 松辽盆地早白垩世发育基性岩类的橄榄玄武岩、玄武岩,中性岩类的玄武安山岩、安山岩、粗安岩,酸性岩类的粗面岩、粗面英安岩、英安岩和流纹岩。早白垩世火山岩都具有大离子亲石元素(LILE)、轻稀土元素(LREE)相对富集的特征,并具有较低的(~(87)Sr/~(86)Sr)_i值和较高的(~(143)Nd/~(144)Nd)_i值。基性岩类Ce/Nb=1.92～8.31,Th/Nb=0.08～0.44,(~(87)Sr/~(86)Sr)_i=0.7031～0.7047,ε_(Nd)(t)=+1.7～+5.2;中性岩类Ce/Nb=3.70～15.80,Th/Nb=0.34～2.58,(~(87)Sr/~(86)Sr)_i=0.7040～0.7054,ε_(Nd)(t)=0～+3.0;酸性岩类Ce/Nb=4.29～15.80,Th/Nb=0.11～1.02,(~(87)Sr/~(86)Sr)_i=0.7038～0.7066,ε_(Nd)(t)=+1.0～+3.3。基性岩类岩浆主要来自被富集了的亏损地幔源的部分熔融,受混染程度很小;中性岩类岩浆源于年轻地壳组分被来自亏损地幔岩浆的再次部分熔融;酸性岩类浆岩可能主要来自源于亏损地幔的初生地壳部分熔融,并受到了上地壳的混染。晚侏罗世-早白垩世,由于蒙古-鄂霍次克洋关闭引发强烈的挤压造山后,发生的岩石圈拆沉作用致使来自亏损地幔的岩浆熔融上涌导致岩石圈主动伸展拉张,地表则表现出大规模的裂谷断陷作用和大范围的火山活动。这个阶段的伸展拉张以主动拉张为主。 |
| 关 键 词： | 松辽盆地 早白垩世 火山岩 地球化学特征 构造意义 |
| 收稿时间： | 2008-12-19 |
| 修稿时间： | 2009-09-02 |
Geochemical characteristics of Early Cretaceous volcanic rocks from Songliao basin, Northeast China, and its tectonic implications |
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| Song LZ,Zhao ZH,Jiao GH,Sun P,Luo X,Jiang XH,Wang ZH,Zeng FY and Miao WD. Geochemical characteristics of Early Cretaceous volcanic rocks from Songliao basin, Northeast China, and its tectonic implications[J]. Acta Petrologica Sinica, 2010, 26(4): 1182-1194 | |
| Authors: | Song LZ Zhao ZH Jiao GH Sun P Luo X Jiang XH Wang ZH Zeng FY Miao WD |
| Affiliation: | Faculty of Natural Resource and Information Technology, China University of Petroleum, Beijing 102249, China;Langfang Branch of Petroleum Exploration and Development Research Institute, Petrochina, Langfang 065007, China;Langfang Branch of Petroleum Exploration and Development Research Institute, Petrochina, Langfang 065007, China;Langfang Branch of Petroleum Exploration and Development Research Institute, Petrochina, Langfang 065007, China;Langfang Branch of Petroleum Exploration and Development Research Institute, Petrochina, Langfang 065007, China;School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China;Langfang Branch of Petroleum Exploration and Development Research Institute, Petrochina, Langfang 065007, China;Langfang Branch of Petroleum Exploration and Development Research Institute, Petrochina, Langfang 065007, China;Langfang Branch of Petroleum Exploration and Development Research Institute, Petrochina, Langfang 065007, China |
| Abstract: | |
| Keywords: | Songliao basin Early Cretaceous Volcanic rocks Geochemical characteristics Tectonic implications |
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