| 辽宁翁泉沟橄榄玄武岩的地质地球化学特征及其形成环境 |
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| 关键词:olivine basalt geochemical characteristics forming environment eastern Liaoning area |
| 基金项目:国家自然科学学基金项目(编号:40073013); 辽宁省国土资源厅项目(编号:20050142) |
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| Geological and Geochemical Characteristics and Formation Environment of the Wenquangou Olivine Basalt in Liaoning Province |
| Wenquangou olivine basalt in Fengcheng of Liaoning Province is a kind of host rock in the Wenquangou ludwigite deposit and has many characteristics of rifting volcanic rock: ① the rock is in zonal distribution concordant with Early Proterozoic volcanic sedimentary rock, and has vesicular and amygdaloidal structures; ② the major elements indicate that the rock is rich in Fe and Mg, with relatively high B, Cl, F, Rb, Cs, Th, U and comparatively low V ,Cr, Ni. HFSE and related ratios are similar to those of common basic rocks. The relationships between Ti, Zr, Cr and Y show that the rock is somewhat a kind of intraplate basalt. The fractionation of LREE from HREE is obvious, negative Eu anomaly is invisible, and the REE pattern makes up a right oblique line, suggesting that the magma has experienced obvious fractionation; ③ a comparison of ΣREE between magnesian host rocks of borate deposits in Liaoning Province reveals that they have the same horizon and are all rich in magnesium, indicating that their rock-forming tectonic background is a rifting tectonic setting. |
| WANG Cui-zhi,XIAO Rong-ge,LIU Jing-dang.2008.Geological and Geochemical Characteristics and Formation Environment of the Wenquangou Olivine Basalt in Liaoning Province[J].Acta Geoscientica Sinica,29(5):542-552. |
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