【作者】 郝兴中；

【导师】 肖克炎； 杨毅恒； 邢树文；

【作者基本信息】 中国地质大学（北京） ， 矿产普查与勘探， 2014， 博士

【摘要】 研究区（鲁西隆起区）地处中朝准地台东缘，其东界以NNE向的昌邑—大店断裂为界，西界为NNE向的聊考断裂，北界为近东西向的齐—广断裂，南界为山东省南界。区内铁矿成矿地质条件优越，是我国重要的矿集区之一。鲁西地区铁矿成因类型多样，地域分布广泛。铁矿主要类型有沉积变质型、矽卡岩型、热液交代充填—风化淋滤型、岩浆型和沉积型等。本文通过全面收集鲁西地区地质、矿产等相关资料，系统总结铁矿成矿地质条件，详细阐述地球物理特征与铁矿床的对应关系。通过解剖韩旺铁矿床、苍峄铁矿带、单县铁矿床、济宁铁矿床、张家洼铁矿床、金岭铁矿床、莲子汪铁矿床、店子铁矿床、肖家沟铁矿床等典型铁矿床，详尽阐明了各类铁矿的矿床特征及其成矿规律，分类总结铁矿成矿模式和区域预测模型。通过划分区内铁矿成矿区带、成矿系列和成矿谱系，圈定了铁矿找矿靶区，指明了铁矿找矿方向。区内沉积变质型铁矿主要成矿时代为新太古代，主要分布于鲁西地块中部、西南部和南部地区，赋矿围岩以泰山岩群、济宁岩群为主；矿体形态为层状、似层状、透镜状，层控现象明显。矽卡岩型铁矿主要成矿时代为燕山晚期，其中包括与中基性侵入岩有关的接触交代—高温热液型磁铁矿矿床和与中酸性侵入岩、浅成岩有关的接触交代—高温热液型磁铁矿矿床；前者主要分布于济南、莱芜和淄博等地，后者分布于苍山、沂南等地；赋矿地段位于碳酸盐岩和侵入岩体的接触带。热液交代充填—风化淋滤型铁矿多分布于淄河断裂一带，形成于燕山晚期。岩浆型钛铁矿床分布于沂沭断裂带内及其附近，形成于古元古代，铁矿石类型为含钛铁辉石角闪石岩。沉积型铁矿受控于中奥陶统灰岩风化面上及上石炭统底部，规模小、品位低、工业价值和找矿意义都不大。通过对鲁西地区地质矿产资料的梳理和分析，同时与成矿预测模型进行对比，本文对鲁西地区铁矿进行了成矿预测，按照矿床成因类型，划分出以韩旺、苍山—枣庄、东平—汶上、单县和济宁等地区为代表的沉积变质型铁矿找矿靶区24处；以莱芜、金岭、苍山地区为代表的矽卡岩型铁矿找矿靶区14处；以淄河地区铁矿为代表的热液交代充填—风化淋滤型铁矿找矿靶区6处；以莒县天宝钛铁矿为代表的岩浆型钛铁矿找矿靶区3处。在上述47处铁矿找矿靶区中，A类靶区19处，B类靶区15处，C类靶区13处。通过本次研究工作，对鲁西地区铁矿找矿靶区进行了圈定，指导了区内今后铁矿找矿方向，通过部分找矿靶区的铁矿勘查工作表明，区内圈定的铁矿找矿靶区划分较为合理、有效。更多还原

【Abstract】 The study area (Luxi Uplift: the west Shandong uplift) is located in the eastern edge ofsino-korean paraplatform. Its eastern boundary is the Changyi-Dadian fault which trends toNNE, its west side reaches to NNE Liaocheng-Lankao fault, nearly EW Qihe-Guangrao fault isbounded as the north edge, the south boundary of Shandong is the southern edge of the studyarea. The study area possesses superior iron ore metallogenic geologic conditions, so as to beone of the important ore-concentrating districts in China.Various genetic types of iron ore deposits are widely distributed in Luxi area (westernShandong province). Five types of iron ore are classified, including sedimentary metamorphictype, skarn type, Hydrothermal metasomatic filling and weathering leaching type, magmaticcrystallization differentiation type and sedimentary type. This paper comprehensively collectsgeological and mineral data in Luxi area, systematically summaries iron ore metallogenicgeological conditions and elaborates the corresponding relations between geophysicalcharacteristics and iron deposits in detail. Based on the characteristics of typical iron oredeposits in the study area, such as Hanwang iron deposit, Cangyi iron ore belt, Shanxian irondeposit, Jining iron deposit, Zhangjiawa iron deposit, Jinling iron deposit, Lianziwang irondeposit, Dianzi iron deposit and Xiaojiagou deposit, the paper illustrates the characteristics andmetallogenic regularities of all kinds of iron deposits, and summaries in category themetallogenic models and regional predicting models. By dividing the iron ore metallogenicbelts, metallogenic series, mineralized pedigree, this study delineates the iron ore prospectingtarget areas, and points out the direction of iron ore prospecting in the area.Sedimentary metamorphic type iron deposits generate in the Neo Archean epoch in Luxiarea. This type, distributing in south, southwest and central of Luxi block, is mineralized in theTaishan Group and Jining Group and characterised by banding, stratoid and lensing ore bodiesand obvious strata-bound features. Main metallogenic epoch of skarn type iron deposits focus inlate Yanshan period. This type is subdivided into two styles according to magma intrusions.One is related to intermediate-basic intrusive rocks, lying in Jinan, Laiwu and Zibo area. Theother is relative to intermediate-acid intrusive rocks, distributed in Cangshan and Yinan county.Two types above are mineralized near contact zone of limestone strata and intrusive rocks.Hydrothermal metasomatic filling and weathering leaching type iron deposits are distributedalong the Zihe fault and generate in late Yanshan period. Magmatic crystallization type isdistributed in the Yishu faults zone and it’s nearby, originated in the Palaeoproterozoic epoch.Iron ore rocks contain titanium-magnetite amphibole pyroxene rock. Sedimentary iron ore type is controlled by the weathering surface of intermediate-Ordovician limestone and the bottom ofthe carboniferous. However, because of small scale and low grade, this type turns outinsignificant industrial value and prospecting significance.Based on the analysis of the regional geological and mineral data in Luxi area, andcomparison with metallogenic predicting models, this paper proposes iron ore metallogenicprediction of Luxi area. According to genetic types of iron ore, we confirm24iron oreprospecting target areas for sedimentary metamorphic type, including Hanwang,Cangshan-Zaozhuang, Dongping-Wenshang, Shanxian, Jining iron deposits and other regions.Fourteen iron ore prospecting targets are delineated for skarn type, represented by Laiwu,Jinling, Lianziwang iron deposits. Six iron ore prospecting target areas for Hydrothermalmetasomatic filling and weathering leaching type, distributed nearby Zihe river. Three ilmeniteiron ore prospecting target areas are suggested for magmatic crystallization differentiation type,represented by Tianbao ilmenite deposit in Juxian county. The total47ore prospecting targetsinclude19A-grade targets,15B-grade ones, and13C-grade ones. The study suggests iron oreprospecting targets in Luxi area, providing guidance for iron ore prospecting direction in thefuture. With Association of exploration data, it is proved that the47delineations are reasonableand effective for guiding iron ore survey in Luxi area.更多还原