河南银洞沟矿区辉长岩地球化学特征及其地质意义
Yindonggou Gabbro Geochemistry and Its Geological Implication, Henan Province
DOI: 10.12677/AG.2018.84090, PDF,   
作者: 袁海明：河南省有色金属地质矿产局第三地质大队，河南 郑州；河南省有色金属矿产探测工程技术研究中心，河南 郑州；蔡洋, 刘清泉, 刘忠法：中南大学有色金属成矿预测与地质环境监测教育部重点实验室，湖南 长沙；中南大学地球科学与信息物理学院，湖南 长沙
关键词: 银洞沟；辉长岩；岩石地球化学；河南；Yindonggou； Gabbro； Lithogeochemistry； Henan Province
摘要: 辉长岩岩石地球化学分析结果显示，岩石SiO2含量为47.05%~50.15%，K2O含量为0.27%~0.47%，Na2O含量为0.64%~2.49%，Al2O3含量为12.14%~16.96%，岩石属低钾拉斑系列。岩石稀土总量较低(34.25~55.77 ppm)，轻重稀土分异不明显，δEu = 0.90~1.10，Eu具有弱的正异常或弱的负异常。岩石具有Nb、Ta、Zr、Hf、Th等HFSE亏损，Ba、U、K、Sr等LILE富集的特征。岩浆可能来源于尖晶石相的地幔部分熔融，岩石形成于岛弧构造环境。
Abstract: The gabbro are characterized by SiO2 = 47.05% - 50.15%, K2O = 0.27% - 0.47%, Na2O = 0.64% - 2.49%, Al2O3 = 12.14% - 16.96%, ACNK = 1.03 - 1.17, which indicate that the gabbro are tholeiite series. The rocks are enriched in LREE, depleted HREE and negative or positive Eu anomalies, enriched in Ba, U, K, Sr, LILE and depleted Nb, Ta, Zr, Hf, Th, HFSE. The magma may be from the spinel phase partial melting. The gabbro formed in the arc tectonic setting.
文章引用：袁海明, 蔡洋, 刘清泉, 刘忠法. 河南银洞沟矿区辉长岩地球化学特征及其地质意义[J]. 地球科学前沿, 2018, 8(4): 829-836. https://doi.org/10.12677/AG.2018.84090

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