| 千里山花岗岩体地质地球化学及与成矿关系 |
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| 引用本文：.1995.Geology and geochemistry of the Qianlishan granite stock and its relationship to polymetallic Tungsten mineralization[J].Mineral Deposits,14(1):12~25 |
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| 基金项目:地质行业基金资助项目“柿竹园钨多金属矿床成矿作用” |
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| 中文摘要:千里山花岗岩由似斑状黑云母花岗岩、等粒黑云母花岗岩和花岗斑岩组成。前两期岩体分别与两期钨多金属矿化有关，后一期与铅锌银成矿密切相联。两套花岗岩虽然均来自地壳，但取于不同源地。该岩体既为富F、Li、Rb、Be、Ga的BELIF花岗岩，又是富U、Th的高热花岗岩。 |
| 中文关键词:花岗岩 地球化学 钨多金属矿床 柿竹园 |
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| Geology and geochemistry of the Qianlishan granite stock and its relationship to polymetallic Tungsten mineralization |
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| Abstract:The Qianlishan granite stock is composed of pseudoporphyritic biotite granite, equigranular biotite granite and granite porphyry dikes. Rock-forming minerals of the three phases of granitic rocks are K-feldspar, albite olibyoclase, quartz and biotite. Petrocbemical data show that these granitoids belong to peraluminous granite series with their differentiation indices (D.I. )being all higher than 92, and the distributional patterns of their trace elements being similar. However, pseudoporphyritic biotite granite and equigranula/biotite granite are some: what different from granite porphyry in accessory minerals, the first two sorts of granitoids containing mainly zircon, monazite, allanite, apatite, zircon, rutile and monazite. In addition, there are no obvious petrochemical evolutionary relations between the first two and the last one. From pseudoporphyrtic biotite granite to equigrarular biotite granite, the differentiational degree of the granitic magma gradually gets higher so that the basic elements and Zr/Hf and La/Yb ratios decrease, Eu depletion becomes stronger, and acid incompatible elements, volatile components, ore-forming elements, and Rb/Sr and U/Th ratios increase. These two phases of granitic rocks are both associated with polymetallic tungsten mineralization. The granite porphyry is lower than the first two granitic rocks in differentiation degree and so are its RblSr and U/Th ratios. Besides, its ZrlHf and La/Yb ratios are higher, and Eu depletion is weaker. The granite porphyry is frequently associated with lead, zinc and silver mineralization. Therefore, we hold that the two groups of granitic rocks, though derived from the crust, are from different sources. The Qianlishan granite stock is highly enriched in F, Li, Rb, Be and Ga, and is a characteristic BELIF ore-forming rock body. Furthermore, due to the enrichment in radioactive elements such as uranium and thorium, these granitoids in the Qianlishan granite stock are considered to be typical high heat production (HHP) granites. |
| keywords:granite, geochemistry, polymetallic tungsten deposit, Shizhuyuan |
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