山东莒县棋山钛铁矿地质特征及成因探讨
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注:本文为山东省地质勘查基金研究项目(编号 20070018)的成果。


Geological Characteristics and Origin of the Qishan Ilmenite Deposit in Shandong Province
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    摘要:

    莒县棋山钛铁矿是山东评价的首个大型钛铁矿矿床。矿区位于沂沭断裂带中段的汞丹山凸起上,其成矿母岩和矿体均为褐绿色中细粒含钛磁铁矿辉石角闪石岩。在发现的五个矿体中,对Ⅰ、Ⅱ、Ⅲ号矿体进行了工程控制。其中Ⅰ号矿体长1600m,平均宽180m,控制深204m,平均品位TiO2 8.68%、TFe 18.46%。Ⅱ号矿体长880m,平均宽160m,控制深120m,平均品位TiO2 8.33%、TFe 17.07%。Ⅲ号矿体矿体长1600m,宽25~67m,控制深170m,平均品位TiO28.86%、TFe20.13%。矿体品位变化系数7.06%~42.0%,属品位稳定的矿体。该矿床具矿体规模大、形态简单,易于开采之特点。通过对矿床地质特征的研究,认为该矿床属岩浆早期分异型钛铁矿床,其成矿时代为古元古代。

    Abstract:

    Qishan ilmenite deposit in Juxian County is the first evaluated largescale ilmenite deposit. It is located tectonically in the Gongdanshan uplift of the middle part of the Yishu fault belt. The primary rock and orebodies are brownish green, finegrained titaniumbearing magnetiteamphibole pyroxene. Among the five bodies discovered, the No. I, II and III ore bodies were controlled in project. The No. 1 orebody is 1600 m long, with an average of 180 m, a controlled depth of 204 m, and the average TiO2 and TFe grades of 8.68% and 18.46%, respectively. The No. II orebody is 880 m long, with an average width of 160 m, a controlled depth of 120 m, the average TiO2 and TFe grades of 8.33% and 17.07%, respectively. The No. III orebody is 1600 m long, with a width of 25 ~ 67 m, a control depth of 170m, the average TiO2 and TFe grades of 8.86% and 20.13%, respectively. The orebody coefficient varying from 7.06% to 42.0% suggests the orebodies with stable grade. This deposit is characterized by large scale, simple form and easytoexploitation. Based on study on its geological characteristics, it is proposed that this deposit belongs to magma differentiated ilmenite deposit at early period, which formed in the Paleoproterozoic era.

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李洪奎,于学峰,杨永波.2010.山东莒县棋山钛铁矿地质特征及成因探讨[J].地质学报,84(7):1041-10488.
lihongkui.2010. Geological Characteristics and Origin of the Qishan Ilmenite Deposit in Shandong Province[J]. Acta Geologica Sinica,84(7):1041-10488.

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历史
  • 收稿日期:2008-10-16
  • 最后修改日期:2008-12-13
  • 录用日期:2008-12-17
  • 在线发布日期: 2010-07-26