THE APPLICATION OF AEROMAGNETIC SURVEY TO THE PROGNOSIS OF LARGE-SIZE PORPHYRY ORE DEPOSITS IN THE EAST SEGMENT OF SOUTH GANDISE
ZHU Lian1, LI Cai-ming2, YAO Xiao-feng1, XIE Jiang-tao2
1. College of Earth Science and Resources, China University of Geosciences,Beijing 100083, China;
2. Chengdu University of Technology, Chengdu 610059, China
The Gangdise volcanic magmatic arc is an important copper-polymetallic prospective area. The deposits are closely related to intermediate-acid igneous rocks. It is important to evaluate aeromagnetic anomalies caused by igneous rocks. This paper studies the aeromagnetic features of two typical porphyry deposits in South Gangdise (Jiama and Qulong) by three-dimensional inversion of magnetic data. Combined with previous achievements, this paper concludes that the upright rock and back magnetization constitutes the principal feature of these two deposits. On such a basis, in combination with the distributional regularity of porphyry copper deposits in South Gangdise, this paper predicts porphyry copper deposits of this type by Hough transform., and delineates 18 potential prospecting areas, thus providing important information for mineral exploration.
朱炼, 李才明, 姚晓峰, 谢江涛. 航磁对南冈底斯东段大型斑岩型矿床的预测[J]. 物探与化探, 2013, 37(1): 53-58.
ZHU Lian, LI Cai-ming, YAO Xiao-feng, XIE Jiang-tao. THE APPLICATION OF AEROMAGNETIC SURVEY TO THE PROGNOSIS OF LARGE-SIZE PORPHYRY ORE DEPOSITS IN THE EAST SEGMENT OF SOUTH GANDISE. Geophysical and Geochemical Exploration, 2013, 37(1): 53-58.
[1] 姚长利,郑元满,张聿文.重磁异常三维物性反演随机子域方法技术[J].地球物理学报,2007,28(6):839-849.[2] Nagy D. The gravitational attraction of a right rectangular prism[J].Geophysics,1966,31:361-371.[3] Li Y, Oldenburg D W. 3-D inversion of magnetic data[J].Geophysics,1996,61 (2):394-408.[4] Li Y, Oldenburg D W. 3-D inversion of gravity data[J].Geophysics,1998,63(1):109-119.[5] AnTonio Guillen,Gabriel Courrioux .Constrained gravity 3D litho-inversion applied to Broken Hill//ASEG 17th Geophysical Conference and Exhibition, Sydney,2004.[6] 管志宁,侯俊胜,黄临平,等.重磁异常反演拟BP神经网络方法及其应用[J].地球物理学报,1998,41(2):242-251.[7] 李军,李才明,王邦华.Marquardt算法磁测三维反演方法策略[J].物探化探计算技术,2004(4).[8] 严加永,吕庆田,孟贵祥.铜陵矿集区中酸性岩体航磁3D成像及对深部找矿方向的指示[J].矿床地质,28(6):838-849.[9] 杨波.三维光滑磁化率成像反演及在大冶铁矿的应用[J].地球物理学进展,2010,25(4):1433-1441.[10] 江玉乐,雷宛.地球物理数据处理教程[M].北京:地质出版社,2006.[11] 刘天佑.重磁异常的反演理论与方法[M]. 武汉:中国地质大学出版社,1992.[12] 潭承泽,郭绍雍.磁法勘探教程[M].北京:地质出版社,1984.[13] 黄国样.应用地球物理:磁法勘探[M].北京:地质出版社,1988.[14] 郭志宏,管志宁,熊盛青.长方体ΔT场及其梯度场无解析奇点理论表达式[J].地球物理学报,2004,47(6).[15] 唐菊兴,邓世林,郑文宝,等.西藏墨竹工卡县甲玛铜多金属矿床勘查模型[J].矿床地质,2011,30(2):179-195.[16] 赵涵,肖渊莆,胡涛.西藏驱龙斑岩型铜矿床成矿模式研究[J].地质与资源,2011,20(3):210-216.[17] 杨志明,侯增谦,宋玉财,等. 西藏驱龙超大型斑岩铜矿床:地质、蚀变与矿化[J].矿床地质,2008,27:279-318.[18] Lowell J, Guilbert J M. Lateral and vertical alteration-mineralization zoning in porphyry ore deposits[J]. Economic Geology,1970,65:373-408.[19] Clark D A, French D H, Lackie M A. Schmidt, P.W. Magnetic petrology:application of inTegrated rock magnetic and petrological techniques to geological in Terpretation of magnetic surveys[J]. Exploration Geophysics,1992,23:65-68.[20] Eun-jung Holden, Shih Ching Fu, Peter Kovesietc, et al.Automatic idenTification of responses from porphyry inTrusive systems within magnetic data using image analysis[J].Journal of Applied Geophysics,2011:255-262.[21] 常青.数字图像处理教程[M].上海:华东理工大学出版社,2009.[22] 袁见齐.矿床学[M].北京:地质出版社,1984.[23] 王德发,周坚鑫,刘振军,等.西藏一江两河地区高精度航磁勘查效果[J].地质通报,2003,22(11-12):912-917.[24] 芮宗瑶,曲晓明,侯增谦,等.冈底斯斑岩铜矿成矿时代及青藏高原隆升[J].矿床地质,2003,21:217-225.