东天山地区两类钒钛磁铁矿型矿床含矿岩石对比
Comparison of host rocks between two vanadic titianomagnetite deposit types from the eastern Tianshan mountains.
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摘要: 新疆东天山地区产出有两类岩浆型钒钛磁铁矿矿床，分别以尾亚和香山西矿床为代表。尾亚是以铁钛为主的中型钒钛磁铁矿矿床，香山西则是以钛为主的大型钛铁矿矿床，与铜镍矿床共生。尾亚矿床含矿岩石的岩石学、岩石化学、稀土及微量元素特征与典型的钒钛磁铁矿矿床相似。而香山西矿床含矿岩石的碱度、镁铁指数（FeO^＊／MgO）、岩浆酸度（αsi）、钙碱富集指数（calk／m）等地球化学参数，氧逸度和硫逸度等物理化学参数均介于独立的典型铜镍硫化物和典型钒钛磁铁矿矿床之间。两类矿床含矿岩石特征的差异可能在于其产出的构造背景不同，导致其含矿岩浆演化过程中处于不同的物理化学条件。
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