用磁异常特征圈定张家山成矿靶区  

THE APPLICATION OF MAGNETIC ANOMALY CHARACTERISTICS TO DELINEATION OF THE ZHANGJIASHAN ORE TARGET AREA

作　　者：杨瑞西[1] 许国丽[1] 司法祯[1] 马振波[1] 

机构地区：[1]河南省地质调查院,河南郑州450051

出　　处：《物探与化探》2008年第4期358-362,共5页Geophysical and Geochemical Exploration

摘　　要：重磁信息最大优点是具有深穿透性,因而能较好揭示深部地质构造特征而被广泛地应用于基础地质研究和资源评价,在调查厚沉积盖层下的基底起伏,推断深部构造和隐伏地质体(其中包括侵入体和矿体)等方面都是非常有用的。重磁信息有效应用的关键是要建立一套标准,以推断地质体的可能的物质组成、规模、埋藏深度,及其与矿化的关系。用东秦岭南泥湖钼矿田磁场特征来对比、推断同一地质构造单元中相同磁场特征的成矿可能性做了尝试,结合地质及各种岩石磁性资料发现了新的钼多金属矿床。he most prominent advantage of the heavy magnetic information is its deep penetrability, which can detect deep geological and structural characteristics. Therefore, the method has been widely used in basic geological research and resource evaluation as well as in the investigation of basement undulation below the thick cover layer and the deduction of deep structures and geological bodies （including invaded bodies and mineralized bodies）. The key of the application of the heavy magnetic information lies in setting up a set of standards to deduce the possible material composition, size and burial depth of the geological body as well as its relationship with mineralization. Based on the data of the Nannihu molybdenum mine in East Qinling Mountains, the authors tried to deduce the mineralization possibility in the same geological-structural unit. The combination of geophysical and geochemical information led to the discovery of a new molybdenum polymetallic deposit.

关 键 词：ΔT磁场特征 磁化率 找矿靶区 钼多金属矿 

分 类 号：P631.2[天文地球—地质矿产勘探]