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| 吉林汪清—辉南地幔透辉石微量元素及其记录的地幔熔融与交代作用 | |
| 引用本文： | 张志海,郑建平,马鸿文.吉林汪清—辉南地幔透辉石微量元素及其记录的地幔熔融与交代作用[J].地质科技情报,2006,25(6):9-16. |
| 作者姓名： | 张志海 郑建平 马鸿文 |
| 作者单位： | 1. 中国地质大学,研究生院,武汉,430074 2. 中国地质大学,地球科学学院,武汉,430074;中国地质大学,地质过程与矿产资源国家重点实验室,武汉,430074 3. 中国地质大学材料科学与工程学院,北京,100083 |
| 摘 要： | 根据吉林汪清(WQ)中新世和辉南(HN)上新世玄武岩捕虏体橄榄岩透辉石的激光探针(LAM-ICPMS)微量元素分析结果,分析了华北北缘与兴蒙造山带结合部位陆下岩石圈地幔所经历的部分熔融作用和地幔交代作用.新生代时无论是靠近华北地块一侧的辉南,还是靠近兴蒙造山带一侧的汪清陆下岩石圈除少量难熔地幔残留外,主体上均表现为显生宙‘大洋型’的地幔特征,即经历了8％以下的部分熔融作用.这些地幔又记录着复杂的地幔交代作用过程,交代介质类似于含水的、含碳酸岩质的硅酸岩熔体.这样的地幔特征与中国东部其他地区新生代时的主体岩石圈相似,也有少量古老地幔残余,由此进一步说明中国东部中、新生代岩石圈减薄作用经历了软流圈地幔对古老岩石圈的侵蚀和最终的置换过程. |
| 关 键 词： | 橄榄岩 透辉石 微量元素 地幔置换作用 华北北部 |
| 文章编号： | 1000-7849（2006）06-0009-08 |
| 收稿时间： | 2006-03-08 |
| 修稿时间： | 2006-03-08 |
Trace Elemental Compositions of Peridotitic Diopsides and the Record of Partial Melting and Metasomatism in Lithosphere Beneath Wangqing and Huinan Areas,Jilin Province |
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| ZHANG Zhi-hai,ZHENG Jian-ping,MA Hong-wen.Trace Elemental Compositions of Peridotitic Diopsides and the Record of Partial Melting and Metasomatism in Lithosphere Beneath Wangqing and Huinan Areas,Jilin Province[J].Geological Science and Technology Information,2006,25(6):9-16. | |
| Authors: | ZHANG Zhi-hai ZHENG Jian-ping MA Hong-wen |
| Institution: | 1a. Graduate School ; lb. Faculty of Earth Sciences ; lc. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China; 2. Faculty of Material Science and Engineering, China University of Geosciences , Beijing 100083, China |
| Abstract: | This paper presents LAM-ICPMS trace element data of peridotitic diopsides from Cenozoic Wangqing and Huinan basalts, Jilin Province. It then discusses the nature of the lithospheric mantle including partial melting and metasomatism beneath the integrate position of the North China Craton and the Xingmeng Orogenic Belt. In Cenozoic, the lithospheric mantle is mainly characterized by the Oceanic affinity with minor relics of refractory one. The mantle recorded less than 8 % partial melting and experienced complex metasomatism by silicatitic and carbonatitic melts. It is found that the characters are similar to those of the main lithosphere mantle in Cenozoic from the other parts of the East China. The coexistence of the major newly accreted mantle with minor relics of refractory one in the area proves the mantle replacement in the Mesozoic-Cenozoic lithospheric thinning. |
| Keywords: | peridotite diopside trace element mantle replacement northern part of North China |
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