| 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： | 毛景文,李红艳,裴荣富,L Raimbaull,B Guy.千里山花岗岩体地质地球化学及与成矿关系[J].矿床地质,1995,14(1):12-25. |
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| 作者姓名： | 毛景文 李红艳 裴荣富 L Raimbaull B Guy |
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| 作者单位： | 中国地质科学院矿床地质研究所 |
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| 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。
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| 关 键 词： | 花岗岩 地球化学 钨 多金属矿床 矿化 |
Geology and geochemistry of the Qianlishan granite stock and its relationship to polymetallic Tungsten mineralization |
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| Mao Jingwen, Li Hongyan and Pei Rongfu.Geology and geochemistry of the Qianlishan granite stock and its relationship to polymetallic Tungsten mineralization[J].Mineral Deposits,1995,14(1):12-25. |
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| Authors: | Mao Jingwen Li Hongyan and Pei Rongfu |
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| Abstract: | The Qianlishan granite stock is composed of pseudoporphyritic biotitegranite , equigranular biotite granite and granite porphyry dikes . Rock-formingminerals of tho three phases of granitic rocks are K-feldspar, albite oligo-clase, quartz and biotite. Petrochemical data show that these granitoids belongto peraluminous granite series with their differentiation indices (D. I.) beingall higher than 92, and the distributional patterns of their trace elementsbeing similar. However, pseudoporphyritic biotite granite and equigranular bi-otite granite are somewhat different from granite porphyry in accessory mi-nerals, the first two sorts of granitoids containing mainly zircon, monazite,allanite, apatite, zircon, rutile and monazite. In addition, there are no obviouspetrochomical evolutionary rolations botween the first two and the last one.From pseudoporphyrtic biotite granite to equigranular biotite granite, thedifferentiational degree of the granitic rnagma gradually gets higher so thatthe basic elements and Zr/Hf and La/Yb ratios decrease, Eu depletion beco-mes stronger, and acid incompatible elemonts, volatile components, ore-form-ing elements. and Rb/Sr and U/Th ratios increase. These two phases of gra-nitic rocks are both associated with polymetallic tungsten mineralization.The granite porphyry is lower than the first two granitic rocks in differenti-ation degree and so are its Rb/Sr and U/Th ratios. Besides, its Zr/Hf andLa/yb ratios are higher, and Eu doplotion is weaker. The granite porphyryis 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 granito stock is highly enriched in F, Li, Rb, Be and Ga,and is a characteristic BELIF ore-forming rock body. Furthermore, due tothe enrichment in radioactive elements such as uranium and thorium, thesegranitoids in the Qianlishan granite stock are considered to be typical highheat production ( HHP) granites . |
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| Keywords: | granite geochemistry polymetallic tungsten deposit Shizhuyuan |
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