Geological Characteristics and Genesis of Luowen Iron Deposit in Preah Vihear of Cambodia
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摘要: 罗文铁矿位于柬埔寨北部柏威夏省罗文县境内，区域上位于罗文真基底穹窿中部，是柬埔寨铁矿产资源的重要产地。该矿区燕山期中酸性岩浆喷发-侵入活动强烈，原生矿体主要呈似层状、透镜状、脉状、囊状产于安山岩、闪长玢岩、凝灰岩等火山岩中，大部分赋矿围岩蚀变发育，主要有矽卡岩化、绿泥石化、绿帘石化、硅化、黑云母化、碳酸盐化等。通过对矿石组构、矿物共生组合、围岩蚀变特征分析，该矿床形成划分为岩浆期和热液期2个成矿期，进一步分为3个成矿阶段：透辉石-石榴子石-磁铁矿阶段、透辉石-石榴子石-透闪石-绿泥石-磁铁矿阶段、黄铁矿（黄铜矿）-镜铁矿-碳酸盐矿物阶段。笔者在野外地质调查和室内分析研究的基础上，认为罗文铁矿矿床成因与火山-次火山岩及其热液活动有关，成矿主要受火山机构尤其是火山口、火山颈相控制，属火山-次火山岩型铁矿床。Abstract: Luowen iron deposit is located in Luowen county of Preah Vihear, northern Cambodia. Located in the center of Luowen basement vault, the deposit is an important origin of Cambodia iron mineral resources. The eruption and intrusion activity of intermediate-acidic magma is strong in Yanshanian. The primary ore bodies mainly present as banding, lensing, vein, cystic, and are hosted by volcanic rock which contains andesite, diorite porphyrite and tuff. Alterations such as skarnization, chloritization, epidotization, silicification, biotitization and carbonatization strongly occur in the surrounding rock. Based on ore textures and mineral assemblages as well as characteristics of surrounding rock alteration, two periods of ore deposition were distinguished: magmatic period and hydrothermal ore-forming period, which could be further subdivided into three metallogenic stages: diopside-garnet-magnetite stage, diopside-garnet-tremolite-chlorite-magnetite stage and pyrite(chalcopyrite)-specularite-carbonate stage. According to the field geological investigation, ore deposit geological characteristics and geochemistry, the genesis of Luowen iron deposit belongs to volcanic-subvolcanic iron deposit, relating to volcanic-subvolcanic rock and their hydrothermal activities. The mineralization is mainly controlled by the volcanic institutions especially crater and volcanic neck.
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Keywords:
- iron deposit /
- volcanic rock /
- volcano-subvolcanic type iron deposit /
- Luowen
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赵旭辉.宁夏核勘院赴柬探获千万吨铁矿储量[N]. 中国国土资源报, 2008-4-11(4). Zhao Xuhui.Ten million tons of iron ore reservers is explored Ningxia Nuclear Industry Geological Exploration Institute in Cambodia[N]. China Land and Resouces News, 2008-4-11(4).
秦来勇, 张雪亮, 赵俊宏, 等. 柬埔寨柏威夏省罗文铁矿普查地质报告[R]. 桂林:中国有色桂林矿产地质研究院, 2012. Qin Laiyong, Zhang Xueliang, Zhao Junhong, et al. The Report on geological survey of Luowen iron deposit in Preah Vihear, Cambodia[R]. Guilin: China Nonferrous Metal Guilin Research Institute of Geology for Mineral Resources, 2012.
吴良士. 民主柬埔寨地质构造与区域成矿[J]. 矿床地质, 2009, 28(3): 381-383. Wu Liangshi. Geological structure and regional metallogeny in Cambodia[J]. Mineral Deposits, 2009, 28(3): 381-383. 徐国端, 石菲菲, 杨自安, 等. 柬埔寨矿产资源分布规律及遥感找矿预测初步研究[J].矿产与地质, 2008, 22(6): 543-546. Xu Guoduan, Shi Feifei, Yang Zian, et al.Preliminarily studying on distributing rules and remote sensing prospecting prediction of mineral resources in Cambodia[J]. Mineral Resources and Geology, 2008, 22(6): 543-546.
翟裕生, 林新多, 池三川, 等.长江中下游内生铁矿床成因类型及成矿系列探讨[J].地质与勘探, 1980, (3): 9-14. Zhai Yusheng, Lin Xinduo, Chi Sanchuan, et al.Study of endogenetic iron deposits genesis and metallogenic series type in the Middle-Lower Yangtze River Valley[J]. Geology and Prospecting, 1980, (3): 9-14.
薛春纪, 姬金生, 杨前进.新疆磁海铁(钴)矿床次火山热液成矿学[J].矿床地质, 2000, 19(2):156-164. Xue Chunji, Ji Jinsheng, Yang Qianjin. Subvolcanic hydrothermal metallogeny of the CIHAI iron (cobalt) deposit, Xinjiang[J]. Mineral Deposits, 2000, 19(2): 156-164.
王玉往, 沙建明, 程春.新疆磁海铁(钴)矿床磁铁矿成分及其成因意义[J].矿床地质, 2006, 25(增刊):321-324. Wang Yuwang, Sha Jianming, Cheng Chun. Composition of magnetite from the Cihai Fe (Co) deposit, Xinjiang, and its genetic significance[J]. Mineral Deposits, 2006, 25(supplement): 321-324.
李秉伦, 谢奕汉.宁芜地区宁芜型铁矿的成因、分类和成矿模式[J].中国科学, 1984, B(1):80-86. Li Binglun, Xie Yihan. Genesis, classification and metallogenic model of Ningwu (Nanjing -Wuhu) porphyritic iron deposits in Ningwu[J]. Science China, 1984, B(1): 80-86.
徐国风, 邵洁涟. 磁铁矿的标型特征及其实际意义[J]. 地质与勘探, 1979, 3: 30-37. Xu Guofeng, Shao Jielian. The typomorphic characteristics of magnetite and its significance[J]. Geology and Prospecting, 1979, 3: 30-37.
赵玉社.新疆磁海铁矿床地质特征及矿床成因[J].西北地质, 2000, 33(1):31-38. Zhao Yushe. Geological characteristics and genesis of Cihai Fe deposit, Xinjiang[J]. Northwestern Geology, 2000, 33(1): 31-38.
孟瑞, 冯希.柬埔寨地质矿产资源概况及矿业政策[J]. 国土资源情报, 2011, 7:49-51. Meng Rui, Feng Xi. Geological survey and mineral resources mining policy in Cambodia[J]. Land and Resources News, 2011, 7: 49-51.
王志华, 张作衡, 蒋宗胜, 等. 西天山智博铁矿床磁铁矿成分特征及其矿床成因意义[J].矿床地质, 2012, 31(5):983-998. Wang Zhihua, Zhang Zuoheng, Jiang Zongsheng, et al.Magnetite composition of Zhibo iron deposit in Western Tianshan Mountains and its genetic significance[J].Mineral Deposits, 2012, 31(5):983-998.
段超, 李延河, 袁顺达, 等. 宁芜矿集区凹山铁矿床磁铁矿元素地球化学特征及其对成矿作用的制约[J].岩石学报, 2012, 028(01):243-257. Duan Chao, Li Yanhe, Yuan Shunda, et al.Geochemical characteristics of magnetite from Washan iron deposit in Ningwu ore district and its constraints on ore-forming[J].Acta Petrologica Sinica, 2012, 028(01):243-257.
陈小华. 梅山铁矿床菱铁矿的地质特征及成因探讨[J].江苏地质, 2003, 27(2):78-82. Chen Xiaohua. Discussion on the Geological Characters and Genesis of Siderite in Meishan IronMine, Jiangsu Province, 2012, 028(01):243-257.
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