Application of high precision magnetic survey in the exploration of Kuquanshan iron mining area in Ejin Banner of Inner Mongolia
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摘要: 为了高效地在内蒙古额济纳旗苦泉山地区寻找深部隐伏的磁铁矿体,评价该区铁多金属矿的资源潜力,在预查的基础上开展了1∶10 000地面高精度磁测工作,识别出了5条断裂,圈定了2个磁异常(C1和C2),经探槽工程验证,在C2磁异常揭露了2个磁铁矿体,取得了较好的找矿效果。勘查结果表明: 通过ΔT磁异常化极运算能较好地推测铁矿体的分布范围,ΔT水平方向导数运算能有效识别区域构造格架; 初步确立“接触带+断裂+高磁异常区”是区域铁矿成矿的有利靶区; 磁铁矿体在经历构造改造作用后会在地表引起强负磁异常,在磁铁矿勘查中要重视这种非正常的磁化现象。研究可为北山地区的矽卡岩型铁矿勘查提供经验借鉴。Abstract: In order to efficiently search for deep hidden magnetite bodies in Kuquanshan area of Ejinagi Banner in Inner Mongolia, and evaluate the resource potential of iron polymetallic ores in this area, the authors carried out 1∶10,000 ground high-precision magnetic survey on the basis of the pre-survey. Five fractures were identified, and 2 magnetic anomalies (C1 and C2) were circled. And 2 magnetite bodies were exposed at C2 magnetic anomaly after the validation of the trench exploratory project, indicating good results in prospecting. The survey results show that the range of iron ore bodies can be better predicted by ΔT magnetic anomaly polarization operation, and the regional tectonic framework can be effectively identified by ΔT horizontal derivative operation. The contact zone+fracture+high magnetic anomaly area was preliminary established as favorable target area for iron ore mineralization in the region. The magnetite bodies after tectonic modification would result in strong negative magnetic anomalies on the surface, and this abnormal magnetization phenomenon should be paid attention to during magnetite exploration. This study could provide some experience for the exploration of skarn-type iron ore in Beishan area.
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[1] 杨合群,李英,李文明,等.北山成矿构造背景概论[J].西北地质,2008,41(1):22-28.
Yang H Q,Li Y,Li W M,et al.General discussion on metallogenitic tectonic setting of Beishan Mountain,Northwestern China[J].Northwestern Geology,2008,41(1):22-28.
[2] 孟贵祥,吕庆田,严加永,等.北山内蒙古地区铁矿成矿特征及其找矿前景[J].矿床地质,2009,28(6):815-829.
Meng G X,Lv Q T,Yan J Y,et al.Iron metallogenic characteristics and prospecting potential of Beishan area,Inner Mongolia[J].Mineral Deposits,2009,28(6):815-829.
[3] 贺锋,苏茂荣,杨建军,等.内蒙古额济纳旗乌珠尔嘎顺铁矿地质特征及成因类型[J].西部资源,2017,14(6):1-4.
He F,Su M R,Yang J J,et al.Geological characteristics and genetic type of Wuzhuergashun iron deposit in Ejinaqi,Inner Mongolia[J].Western Resources,2017,14(6):1-4.
[4] 刘永慧,肖荣阁,赵清旭.内蒙古北山北带铜多金属成矿地质特征及成矿规律分析[J].西部资源,2014,11(2):87-91.
Liu Y H,Xiao R G,Zhao Q X.Analysis on the mineralizing regularities and the minerogenetic conditions of Cu multi-metal mining area in the Northern belt of Beishan in Inner Mongolia[J].Western Resources,2014,11(2):87-91.
[5] 张子珍,巩智镇,张海平,等.内蒙古北山地区黑鹰山铁矿地质特征及矿床成因初探[J].西部资源,2012,9(1):144-146.
Zhang Z Z,Gong Z Z,Zhang H P,et al.Geological characteristics and genesis of the Black Yingshan Iron ore deposit in Beishan area,Inner Mongolia[J].Western Resources,2012,9(1):144-146.
[6] 白大明,聂凤军,杨崇文,等.综合物探方法在蒙—甘—新相邻(北山)地区东段铜矿预查区勘查评价中的应用[J].地球学报,2001,22(5):459-464.
Bai D M,Nie F J,Yang C W,et al.The application of integrated geophysical method to the evaluation of copper deposits in the eastern section of the Inner Mongolia-Gansu-Xinjiang juncture area (Beishan)[J].Acta Geoscientia Sinica,2001,22(5):459-464.
[7] 吴煜. 高精度磁法在矿田找矿中的应用——以内蒙古获各琦矿田为例[D].北京:中国地质大学(北京),2012.Wu Y.The Application of High-Precision Magnetic Method to the Mine Field in Geology and Mineral Resources Huo Geqi Orefield for Example[D].Beijing:China University of Geosciences (Beijing),2012.
[8] 郝智慧,胡二红,张善明,等.内蒙古额济纳旗半岛山金锑矿区地质特征及成矿潜力[J].中国地质调查,2022,9(1):41-53.
Hao Z H,Hu E H,Zhang S M,et al.Geological characteristics and metallogenic potential of Bandaoshan gold-antimony ore area in Ejina Banner of Inner Mongolia[J].Geological Survey of China,2022,9(1):41-53.
[9] 柳建新,郭振威,童孝忠,等.地面高精度磁法在新疆哈密地区磁铁矿勘查中的应用[J].地质与勘探,2011,47(3):432-438.
Liu J X,Guo Z W,Tong X Z,et al.Application of the ground high-precision magnetic method to magnetite survey in the Hami area,Xinjiang[J].Geology and Exploration,2011,47(3):432-438.
[10] 李少雄. 邯邢地区深部找矿中非典型磁异常解释研究[D].邯郸:河北工程大学,2010.Li S X.A Study on Atypical Magnetic Anomaly Interpretation in Deep Prospecting of Handan-Xingtai Area[D].Handan:Hebei University of Engineering,2010.
[11] 王新华,鲁世朋,谢志远,等.新疆比勒提地区断裂构造磁异常信息提取及解释[J].地质通报,2014,33(1):99-103.
Wang X H,Lu S P,Xie Z Y,et al.The extraction and explanation of magnetic anomalies in Bileti area of Xinjiang[J].Geological Bulletin of China,2014,33(1):99-103.
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