| 山东齐河-禹城富铁矿区李屯岩体地质特征初探 |
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| 引用本文： | 沈立军,朱裕振,高志军.山东齐河-禹城富铁矿区李屯岩体地质特征初探[J].山东国土资源,2020,36(2):23-29. |
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| 作者姓名： | 沈立军 朱裕振 高志军 |
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| 作者单位： | 山东省煤田地质规划勘察研究院,山东济南 250104;山东省煤田地质规划勘察研究院,山东济南 250104;山东省煤田地质规划勘察研究院,山东济南 250104 |
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| 基金项目： | 山东省2018年度地勘基金项目;山东省煤田地质局2019年度科研专项奖励基金项目 |
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| 摘 要： | 近年来,山东省齐河-禹城地区矽卡岩型铁矿找矿工作取得了重大进展,但对控矿岩体的研究相对薄弱,该文对岩体的基本地质特征、形成演化及其与成矿的关系进行了系统研究。研究表明,李屯岩体平面形态呈不对称“马蹄”形,总体产状E倾,垂向形态呈“驼峰”状,侵位于奥陶系和石炭-二叠系等地层内。岩性主要为角闪闪长岩、辉石闪长岩、石英闪长岩及辉长岩等。远矿闪长岩属钙碱性系列,为富钙、富镁、贫铁的过铝质岩石;近矿闪长岩因热液影响显示为低钾系列,为贫钾、富钙、贫铁、贫镁的过铝质岩石。形成时代为早白垩世,在华北克拉通岩石圈减薄与克拉通破坏构造背景下,深部岩浆沿齐广断裂上侵,在断裂东侧的奥陶纪及石炭-二叠纪等地层拉张空间就位,后经构造抬升、剥蚀,形成现在的分布格局。岩体不仅控制了富铁矿体的产出,同时为其提供了成矿物质来源。
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| 关 键 词： | 富铁矿 矽卡岩 李屯岩体 齐河-禹城地区 山东省 |
Paimary Study on Geological Characteristics of Litun Rock Mass in QiheYucheng Rich Iron Ore Area in Shandong Province |
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| SHEN Lijun,ZHU Yuzhen and GAO Zhijun.Paimary Study on Geological Characteristics of Litun Rock Mass in QiheYucheng Rich Iron Ore Area in Shandong Province[J].Land and Resources in SHANDONG Province,2020,36(2):23-29. |
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| Authors: | SHEN Lijun ZHU Yuzhen and GAO Zhijun |
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| Abstract: | In recent years, great progress has been made in the exploration of skarn type iron ore in Qihe Yucheng area in Shandong province. But the study on ore controlling rock mass is relatively weak. In this paper, basic geological characteristics, formation and evolution of rock mass and its relationship with mineralization have been studied for the first time. It is showed that the plane shape of Litun rock body is asymmetric "horseshoe" shape with the trend of E, and the vertical shape is "Hump" shape, which intrudes into the Ordovician and Carboniferous Permian strata. The lithology is mainly hornblende, pyroxene diorite, quartz diorite and gabbro. The distant ore diorite belongs to calc alkaline series, which is a peraluminous rock rich in calcium, magnesium and iron. The near ore diorite is a low K series, which is poor in potassium, calcium, iron and magnesium due to the influence of hydrothermal solution. The formation time is early Cretaceous. Under the background of lithospheric thinning and cratonic destruction of North China Craton, the deep magma intrudes along the qiguang fault, and is in place in the Ordovician and Carboniferous Permian strata in the east of the fault. After tectonic uplift and denudation, the present distribution pattern is formed. The rock mass not only controls the occurrence of iron rich ore bodies, but also provides the source for oreforming materials. |
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| Keywords: | Rich iron deposit skarn Litun rock mass QiheYucheng area Shandong province |
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