| 江西岩背斑岩锡矿区火山侵入杂岩稀土元素特征和成岩模拟 |
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| 引用本文： | 刘昌实,沈渭洲,熊小林,王德滋.江西岩背斑岩锡矿区火山侵入杂岩稀土元素特征和成岩模拟[J].岩石矿物学杂志,1994,13(3):193-203. |
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| 作者姓名： | 刘昌实 沈渭洲 熊小林 王德滋 |
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| 作者单位： | 南京大学地球科学系 |
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| 摘 要： | 以岩背斑岩锡矿区火山侵入杂岩为例，根据稀土元素Ｃｅ，Ｎｄ，Ｅｕ，Ｙｂ等５种元素６种不同式样协变关系（元素－元素，比值－比值）的判别，重建了本区火山侵入杂岩成岩机制。结果认为，本区第一旋回酸性岩浆是由华南加里东褶皱区基底（云开群）Ｆ＝０．３的聚集熔融形成的。未喷出地表的那一部分岩浆经历了Ｆ＝０．２的分离结晶作用形成本区残余的花岗质熔体。
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| 关 键 词： | 杂岩 稀土族 成岩模拟 斑岩 锡矿床 |
REE Characteristics and Petrogenic Models of the Volcanic-Intrusive Complex in the Yanbei Porphyry Tin Ore District |
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| Liu Changshi,Shen Weizhou,Xiong Xiaolin,Wang Dezi.REE Characteristics and Petrogenic Models of the Volcanic-Intrusive Complex in the Yanbei Porphyry Tin Ore District[J].Acta Petrologica Et Mineralogica,1994,13(3):193-203. |
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| Authors: | Liu Changshi Shen Weizhou Xiong Xiaolin Wang Dezi |
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| Abstract: | Taking the volcanic-intrusive complex in the Yanbei porphyry tin oredistrict as an example and based on the covariance plots of Ce,Nd,Sm,Eu,Yb in six different elemont-element,ratio-ratio coordinates,the authors havereestablished the petrogenic mechanism of the volcanic-intrusive complex inthis district.The results suggest that the melt of the first acidic magmaticcycle was formed as a result of accumulativo melting of basement rocks in South China(F=0.3).A part of acidic magma of the first cycle which wasnot extruded onto the surface might be crystallized in fractional crystalliz-ation state at depth,leading to the formation of residual granitic melts(F=0.2). |
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| Keywords: | porphyry tin deposit REE covariance plot petrogenic model |
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