| 摘要: |
| 盂县辉长苏长岩体分为两个相带:边缘相为蚀变中细粒辉长岩,中心相为蚀变中粗粒辉长岩。m/f值介于0.41~2.10之间,属铁质基性岩。区内有钠化辉长苏长岩,钠高、铁低,其原岩细粒辉长苏长岩则是钠低、铁高,表明钠化使铁质活化、转移和富集。含矿岩体下部表现为高电阻、低极化率、强磁性特征,辉长岩体底部及边部可能富集形成钒钛磁铁矿和金属硫化物矿床。 |
| 关键词: 盂县 辉长苏长岩体 太古宇 山西 |
| DOI： |
| 附件 |
| 投稿时间：2007-06-30 |
| 基金项目: |
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| Gabbro-norite masses in Yuxian, Shanxi:characteristics and ore potential |
| LIU Xue-mei |
| (No.3 Research Institute of Geological Engineering Exploration, Yuci 030620, Shanxi, China) |
| Abstract: |
| Two facies belts may be discriminated for the gabbro-norite masses in Yuxian, Shanxi:the marginal facies consisting of altered medium-to fine-grained gabbro and the central facies composed of altered medium-to coarsegrained gabbro. The m/f ratios range between 0.41 and 2.10, indicating a kind of ferruginous basic rocks. The albitized gabbro-norite from the study area is characterized by higher Na contents (Na2O=4.98%) and lower Fe contents (TFe=3.36%), while their protoliths fine-grained gabbro-norite by lower Na contents (Na2O=1.02%) and higher Fe contents (TFe=11.64 -14.94%), implying that the activation, migration and enrichment of Fe were caused by albitization. The lower part of the ore-bearing rocks has higher electrical resistivity, lower polarizability and strong magnetism. The vanado-titano-magnetite deposits and metallic sulphide deposits may be emplaced in the basal and marginal parts of the gabbro masses. |
| Key words: Yuxian gabbro-norite mass Archean Shanxi |
