| 徐州地区辉绿岩地球化学特征 |
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| 引用本文： | 王善明,张洁,张琪,等.徐州地区辉绿岩地球化学特征[J].地质学刊,2018,42(1):23-31. |
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| 作者姓名： | 王善明 张洁 张琪 等 |
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| 作者单位： | 江苏省地质勘查技术院;南京地质调查中心;江苏省地质矿产局第五地质大队;湖南省地质矿产勘查开发局四一三队;江苏省地质矿产勘查局 |
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| 基金项目： | 国家青年科学基金项目“安徽栏杆含金刚石母岩及金刚石矿床指示矿物特征研究”（41402075），中央地质勘查基金项目“安徽栏杆金刚石成矿规律与苏皖地区金刚石找矿靶区优选”（12120114054301） |
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| 摘 要： | 对徐州栏杆地区侵位于元古代地层中的辉绿岩进行了系统的地球化学研究。栏杆地区的辉绿岩属于板内玄武岩系列岩石,地球化学特征上略富集轻稀土元素(LREE),富集大离子亲石元素(LILE),略亏损高场强元素(HFSE),相对富集Cr和Ni;微量元素显示了EM-OIB(富集地幔-洋岛玄武岩)的特征,辉绿岩稀土元素特征显示在岩浆上侵过程中经历了分离结晶作用。结合新元古代全球Rodinia超大陆裂解事件及其岩浆活动与地幔柱的密切关系,认为徐州地区新元古代辉绿岩可能为地幔柱作用在华北陆块边缘的记录。
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| 关 键 词： | 辉绿岩 地球化学 江苏徐州 |
A study on the geochemistry of diabase from Xuzhou area |
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| WANG Shanming,ZHANG Jie,ZHANG Qi,et al.A study on the geochemistry of diabase from Xuzhou area[J].Jiangsu Geology,2018,42(1):23-31. |
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| Authors: | WANG Shanming ZHANG Jie ZHANG Qi |
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| Abstract: | This paper presents a synthetic geochemical study on diabase emplaced in the Proterozoic strata in Langan area, Xuzhou of northern Jiangsu Province. The diabase is plotted in the within-plate basalt and is relatively enriched in LREE and LILE, comparatively enriched in Cr and Ni, but slightly depleted in HFSE. The trace elements suggested that the diabases exhibited similar features to EM-OIB and experienced crystallization and differentiation in magma upsurging shown by their REE features. Taking along with the Neoproterozoic breakup of the Rodinia supercontinent and the close relationship between the coeval magmatism and super mantle plume, this paper believes that the Neoproterozoic diabases in the Xuzhou area is the record of the contemporaneous mantle plume action in the continental margin of the North China Block |
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| Keywords: | diabase geochemistry Xuzhou of Jiangsu |
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