| 海南岛戈枕金矿带煌斑岩的岩石地球化学研究 |
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| 引用本文： | 许德如.海南岛戈枕金矿带煌斑岩的岩石地球化学研究[J].大地构造与成矿学,1999,23(4):353-360. |
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| 作者姓名： | 许德如 |
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| 作者单位： | 中国科学院长沙大地构造研究所,湖南,长沙,410013 |
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| 基金项目： | 金矿资源战略接替基地基金;; |
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| 摘 要： | 对海南岛戈枕金矿带与金矿脉在空间上紧密共生的暗色脉岩的地质特征、矿物学、主要元素、微量元素、同位素地球化学的研究，确定这种脉岩为煌斑岩。岩石类型以钙碱性煌斑岩为主，呈现两种稀土配分模式，即平坦向右倾斜型和星四重效应的W型；Sr、Nd同位素及元素地球化学综合研究表明，本区煌斑岩可划分为两组类型，它们时代相同但地幔源区相异，可能形成于特殊的构造环境。
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| 关 键 词： | 海南岛 煌斑岩 岩石地球化学 |
| 文章编号： | 1001－1552(1999)04－0353－08 |
A STUDY ON THE ROCK CHEMISTRY OF LAMPROPHYRE IN THE GEZHEN GOLD-BEARING ZONE,HAINAN ISLAND |
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| XU De-ru.A STUDY ON THE ROCK CHEMISTRY OF LAMPROPHYRE IN THE GEZHEN GOLD-BEARING ZONE,HAINAN ISLAND[J].Geotectonica et Metallogenia,1999,23(4):353-360. |
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| Authors: | XU De-ru |
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| Abstract: | According to geological features, rock structure and texture, mineral association and rock chemised, it is shown that the veinrock closely associated with the Gezhen gold ore deposit is lamprophyre and not diorite-porphyrite. The rock is mainly cafe-alkalic with typical lamprophyric texture, cavity and zonal structure and idiomorphic phenocryst of water-bearing minerals(amphiboleand biotite). LREE is rich with twO kinds of pattern: smooth with little inclining and W-shape withquadruple effect. Sr, Nd isotopic geochmnology and other lines of evidence of rock chemistry indicate that the lamprophyre has two different types at the same time but different mantle originalmagma. It is formed under a special tectonic environment. |
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| Keywords: | lampmphyre rock chemistry Hainan Island |
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