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| 桂东北煌斑岩地球化学特征及其成因研究 | |
| 引用本文： | 鹿,坤.桂东北煌斑岩地球化学特征及其成因研究[J].地质与勘探,2009,45(2):8-13. |
| 作者姓名： | 鹿 坤 |
| 作者单位： | 1. 中国地质大学(北京)能源学院,北京,100083 2. 桂林工学院资源与环境工程系,桂林,541004 3. 中国地质科学院矿产资源研究所,北京,100037 |
| 基金项目： | 国家自然科学基金项目(编号:40772126);;广西自然科学基金项目(编号:桂科自0542001)联合资助 |
| 摘 要： | 桂东北煌斑岩SiO2含量主要在33.74%～48.14%之间,属基性-超基性范围,为钙碱性岩系、钾质-超钾质煌斑岩;地球化学表明,桂东北煌斑岩以富集大离子亲石元素和轻稀土元素,而亏损高场强元素(Ta-Nb-Ti)为特征,轻、重稀土具有较好的分馏.结合元素地球化学和地质发展史研究表明,桂东北煌斑岩为富含稀土元素的俯冲带流体交代过的富集地幔部分熔融所产生的岩浆.在上升过程中受到部分地壳混染的产物. |
| 关 键 词： | 煌斑岩 地球化学特征 部分熔融 地壳混染 桂东北 |
| 收稿时间： | 2008/6/10 0:00:00 |
| 修稿时间： | 2008/8/15 0:00:00 |
Geochem istry and Or ig in of Lamprophyre in the Northea st of Guangx i |
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| LU Kun.Geochem istry and Or ig in of Lamprophyre in the Northea st of Guangx i[J].Geology and Prospecting,2009,45(2):8-13. | |
| Authors: | LU Kun |
| Institution: | 1.China University of Geosciences;Beijing 100083;2.Department of Resource and Environmental Engineering;Guilin University of Technology;Guilin 541004;3.Institute of Mineral Resources;Chinese Academy of Geological Sciences;Beijing 100037 |
| Abstract: | The content of silicon dioxide in the lamprophyres in northeast Guangxi changes from 33.74% to 48.14%,which can be classified as basic to ultra-basic,potassic to ultra-potassic lamprophyre of the calc-alkaline rock series.The geochemical study demonstrates that the lamprophyre dykes are characterized by significant LILE and LREE enrichment but a depletion in HFS elements(Ta-Nb-Ti),there is moderate to strong fractionation between the light and heavy REE.The study of element geochemistry and geological histo... |
| Keywords: | lamprophyres geochemistry partial melting crustal contamination northeast Guangxi |
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