全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

先验地质信息约束下的三维重磁反演建模研究——以安徽泥河铁矿为例

DOI: 10.6038/j.issn.0001-5733.2012.12.031, PP. 4194-4206

Keywords: 泥河铁矿,3D地质建模,交互反演,深部找矿

Full-Text   Cite this paper   Add to My Lib

Abstract:

安徽泥河铁(硫)矿床是近年发现的大深度隐伏矿床,它的发现再次引发了庐枞地区深部找矿的热潮.建立矿区的三维精细地质模型,对寻找深、边部隐伏矿体,深入认识深部成矿、控矿规律意义重大.本文以泥河矿区为实例,开展先验地质信息约束的三维重磁建模研究,获得了矿区面积5.6km2(2.8km×2.0km)、深度1.2km内的三维地质模型.在三维可视化平台上对该模型进行了地质解释,全面分析了矿体、地层与次火山岩之间的空间分布及对应关系,发现铁矿主要赋存于闪长玢岩与砖桥组火山岩之间,且在玢岩穹窿地段矿体厚大,这对认识"玢岩型"铁矿的成矿模式具有重要的实际意义;三维模型的重磁正演响应基本拟合了实际重磁异常,说明在建模区域内已没有新的矿体;本文提出的三维地质建模流程可为其它地区开展类似工作提供借鉴,同时研究表明地质信息约束下的三维重磁建模研究在深、边部找矿和重磁异常的精细解剖等方面具有潜在的价值和广阔的应用前景.

References

[1]  Williams N C. Geologically-constrained UBC-GIF gravity and magnetic inversions with examples from the agnew-wiluna greenstone belt, western Australia . Canada: The university of british Columbia,2008.
[2]  Fullagar P K, Hughes N A, Paine J.Drilling-constrained 3D gravity interpretation. Exploration Geophysics, 2000, 31:17-23.
[3]  Fullagar P K, Pears G A. Towards geologically realistic inversion, in B. Milkereit, ed.. Exploration in the new millennium. Proceedings of the Fifth Decennial Conference on Mineral Exploration, 2007,445-460.
[4]  于鹏,戴明刚,王家林等. 密度和速度随机分布共网格模型的重力与地震联合反演. 地球物理学报, 2008,51(3): 845-852. Yu P, Dai M G, Wang J L, et al. Joint inversion of gravity and seismic data based on common gridded model with random density and velocity distributions. Chinese J. Geophys. (in Chinese),2008,51(3): 845-852.
[5]  Bosch M, McGaughey J. Joint inversion of gravity and magnetic data under lithologic constraints. The Leading Edge, 2001, 8:877-881.
[6]  徐亚,郝天珧,黄松等. 渤海湾地区壳幔结构重磁综合研究. 地球物理学报, 2011,54(12): 3344-3351. Xu Y, Hao T Y, Huang S, et al. Crustal and mantle structure of the Bohai bay area based on the gravity and magnetic data. Chinese J. Geophys. (in Chinese) , 2011 ,54 (12) : 3344-3351.
[7]  翟裕生,姚书振,林新多等. 长江中下游地区铁铜(金)成矿规律. 北京:地质出版社,1992: 12-35. Zhai Y S,Yao S Z,Lin X D,et al. Middle and Lower Reaches of the Yangtze River Iron Copper (Gold) Metallogenic Regularities (in Chinese). Beijing: Geological Publishing House,1992: 12-35.
[8]  赵文广,吴明安,张宜勇等. 安徽省庐江县泥河铁硫矿床地质特征及成因初步分析.地质学报,2011,85(5):789-801. Zhao W G,Wu M A,Zhang Y Y,et al. Geological characteristics and genesis of the Nihe Fe-S deposit Lujiang country Anhui province. Acta Geologica Sinica (in Chinese),2011,85(5):789-801.
[9]  吕庆田, 史大年, 汤井田等. 长江中下游成矿带及典型矿集区深部结构探测.地球学报,2011,32(3):257-268. Lü Q T,Shi D N,Tang J T,et al. Probing on deep structure of middle and lower reaches of the Yangtze metallogenic belt and typical ore concentration area. Acta Geoscientica Sinica (in Chinese),2011,32(3):257-268.
[10]  江永宏.安徽庐枞地区铁-铜矿成矿规律与找矿.世界地质,2010,29(3):372-382. Jiang Y H. Metallogenic regularity and prospecting of Fe-Cu deposit in Lujiang-Zongyang area of Anhui. Global Geology (in Chinese) ,2010,29(3):372-382.
[11]  吴礼彬,陈芳,杜建国等. 安徽庐枞地区铁矿成矿条件和综合信息标志. 地质通报,2010,29(10):1572-1578. Wu L B,Chen F,DuJG,et al. Analysis on metallogenic conditions and integrated information signs of iron deposits in Lujiang-Zongyang area Anhui China. Geological Bulletin of China (in chinese),2010,29(10):1572-1578.
[12]  覃永军,曾键年,曾勇等.安徽南部庐枞盆地罗河-泥河铁矿田含矿辉石粗安玢岩锆石LA-ICP-MS U-Pb定年及其地质意义.地质通报,2010,29(6):851-862. Tan Y J,Zeng J N,Zeng Y,et al. Zircon LA-ICP-MS U-Pb dating of ore-bearing pyroxene-trachyandesite porphyry and its geological significance in Luohe-Nihe iron ore field in Luzong basin southern Anhui China. Geological Bulletin of China (in Chinese),2010,29(6): 851-862.
[13]  周涛发,范裕,袁峰等. 庐枞盆地侵入岩的时空格架和对成矿制约. 岩石学报, 2010,26(9) : 2694-2714. Zhou T F,Fan Y,Yuan F,et al. Temporal spatial framework of magmatic intrusions in Luzong volcanic basin in East China and their constrain to mineralizationsl. Acta Petrologica Sinica (in Chinese), 2010,26(9) : 2694-2714.
[14]  周涛发,范裕,袁峰等.长江中下游成矿带火山岩盆地的成岩成矿作用. 地质学报,2011,85(5):712-730. Zhou T F,Fan Y,Yuan F,et al. Petrogensis and metallogeny study of the volcanic basins in the middle and lower yangtze metallogenic belt. Acta Geologica Sinica (in Chinese),2011,85(5):712-730.
[15]  周涛发,王彪,范裕等. 庐枞盆地与A型花岗岩有关的磁铁矿-阳起石-磷灰石矿床—以马口铁矿床为例.岩石学报,2012,28(10):3087-3098. Zhou T F,Wang B,Fan Y,et al. Apatite-actinolite-magnetite deposit related to A-tpye granite in Luzong basin: Evidence from Makou iron deposit. Acta Petrologica Sinica,2012,28(10):3087-3098.
[16]  吴明安,张千明,汪祥云等.安徽庐江龙桥铁矿.北京: 地质出版社,1996,172. Wu M A,Zhang Q M,Wang X Y,et al. Anhui Longqiao iron ore deposit. Beijing: Geological Publishing House (in Chinese),1996,172.
[17]  吴明安,汪青松,郑光文等. 安徽庐江泥河铁矿的发现意义. 地质学报,2011,85(5):802-809. Wu M A,Wang Q S,Zheng G W,et al. Discovery of the Nihe Iron Deposit in Lujiang, Anhui, and its Exploration Significance. Acta Geologica Sinica (in Chinese),2011,85(5):802-809.
[18]  Malehmir A H. Thunehed and A. Tryggvason. The paleoproterozoic Kristineberg mining area, northern Sweden: Results from integrated 3D geophysical and geologic modeling, and implication for targeting ore deposits. Geophysics, 2009, 74, no.1: B9-B22.
[19]  Jessell M.. Three-dimensional geological modelling of potential-field data. Computers & Geosciences, 2001, 27:455-465.
[20]  于鹏,王家林,吴健生. 二度半长方体组合模型的重力模拟退火反演. 地球物理学报,2007 ,50 (3) :882-889. Yu P , Wang J L , Wu J S. An inversion of gravity anomalies by using a 215 dimensional rectangle gridded model and the simulated annealing algorithm. Chinese J. Geophys. (in Chinese) , 2007 ,50 (3) :882-889.
[21]  孟小红,刘国峰,陈召曦等.基于剩余异常相关成像的重磁物性反演方法.地球物理学报,2012,55(1):304-309. Meng X H, Liu G F, Chen S Y, et al. 3D gravity and magnetic inversion for physical properties based on residual anomaly correlation. Chinese J. Geophys. (in Chinese), 2007,55(1):304-309.
[22]  曾琴琴, 刘天佑. 重、磁异常的经验模态分解及其在鄂东张福山铁矿勘探中的应用.地球物理学进展, 2011,26(4): 1409-141. Zeng Q Q, Liu T Y. EMD of gravity and magnetic anomalies and its application for iron deposit exploration in Zhangfushan, Eastern Hubei. Chinese J. Geophys. (in Chinese),2011,26(4): 1409-1414.
[23]  杨文采, 施志群, 侯遵泽等.离散小波变换与重力异常多重分解.地球物理学报, 2001,44(04): 534-541. Yang W C, Shi Z Q, Hou Z Z, et al. Discrete wavelet transform for multiple decomposition of gravity anomalies. Chinese J. Geophys. (in Chinese),2001,44(04): 534-541.
[24]  徐世浙,余海龙,李海侠等. 基于位场分离与延拓的视密度反演.地球物理学报, 2009,52(6): 1592-1598. Xu S Z, Yu H L, Li H X, et al. The inversion of apparent density based on the separation and continuation of potential field. Chinese J. Geophys. (in Chinese),2009,52(6): 1592-1598.
[25]  Lu Q T, Qi G, Yan J Y, et al. 3D geologic model of Shizishan ore field constrained by gravity and magnetic interactive modeling: A case history. Geophysics, 2013,78(1):1-11.
[26]  常印佛,刘湘培,吴言昌等.长江中下游铜铁成矿带. 北京:地质出版社,1991: 1-56. Chang Y F,Liu X P,Wu Y C,et al. Middle and Lower Reaches of the Yangtze Metallogenic Belt (in Chinese). Beijing: Geological Publishing House,1991: 1-56.
[27]  Li Y, Oldenburg D W. 3D inversion of magnetic data. Geophysics, 1996, 61:394-408.
[28]  Li Y, Oldenburg D W. 3D inversion of gravity data. Geophysics, 1998, 63:109-119.
[29]  姚长利.重磁遗传算法三维反演中高速计算及有效存储方法技术. 地球物理学报, 2003,46(2): 252-258. Yao C L. High-speed computation and efficient storage in 3D gravity and magnetic inversion based on genetic algorithms. Chinese J. Geophys. (in Chinese),2003,46(2): 252-258.
[30]  陈召曦, 孟小红, 郭良辉.重磁数据三维物性反演方法进展.地球物理学进展, 2012,27(2): 503-511. Chen Z X, Meng X H, Guo L H. Review of 3D property inversion of gravity and magnetic data. Chinese J. Geophys. (in Chinese),2012,27(2): 503-511.
[31]  徐岩,舒萍, 纪学雁.松辽盆地徐深气田火山岩气藏地质约束-测井地震建模方法探讨.地球物理学报, 2011,54(2): 336-342. Xu Y, Shu P, Ji X Y. A research on object-control geology modeling of volcano reservoir with seismic and logging data in Xushen gas field. Chinese J. Geophys. (in Chinese),2011,54(2): 336-342.
[32]  王新胜, 方剑, 许厚泽等. 华北克拉通岩石圈三维密度结构. 地球物理学报, 2012,55(4): 1154-1160. Wang X S, Fang J, Xu H Z, et al. Density structure of the lithosphere beneath North China Craton. Chinese J. Geophys. (in Chinese),2012,55(4): 1154-1160.
[33]  Keating, P., and N. Pinet. Use of non-linar filtering for the regional-residual separation of potential field data. Journal of Applied Geophysics, 2011a,73:315-322.
[34]  徐世浙.迭代法与FFT法位场向下延拓效果的比较.地球物理学报,2007, 50(1):285-289. Xu S Z. A comparison of effects between the iteration method and FFT for downward continuation of potential fields. Chinese J. Geophys. (in Chinese), 2007, 50(1):285-289.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133