摘要
运用ERDAS IMAGINE 9.1和MAPGIS 6.7软件提取剩余重力坡度和磁坡度,根据已知矿床(点)与剩余重力坡度和磁坡度的关系得出:相山矿田内重力坡度在62°～73°(剩余重力值扩大15倍)且剩余重力值在-3～1 m/s2的区域为成矿有利区;北部成矿区磁坡度在40°～50°和61°～70°的两个区间为成矿有利区,西部成矿区磁坡度小于30°且磁异常值为-40～-45 nT的区域为成矿有利区,整个矿田磁坡度为71°～80°且磁异常值小于零的区域为成矿有利区。提取的剩余重力坡度异常和磁坡度异常能够反映矿田深部有利成矿部位,对深部找矿具有指导作用。
Using both ERDAS IMAGINE 9.1 and MAPGIS 6.7, the authors extracted abnormal surplus gravity slope and magnet slope and, with the help of the known relationships between mineral deposits and the abnormal surplus gravity slopes and magnet slopes, reached the following conclusions： Where the gravity slope is within 62° -73°（ the value of the surplus gravity is enlarged by 15 times） and the value of the surplus gravity is within -3 - 1 m/s2, the conditions are favorable for mineralization; in the north, where the magnet slopes are within 40° -50° and 61 ° -70°, the conditions are favorable for mineralization; in the west, where the magnet s!opes are less than 30° and the value of the abnormal magnet is within -40 - -45 nT, the conditions are favorable for mineralization; in the whole mineral deposit, where the magnet slopes are within 71° -80° and the abnormal value of magnet is less than zero, the conditions are favorable for mineralization. The extracted abnormal surplus gravity slope and the abnormal magnet slope can reflect the favorable ore-forming places in the depth, and thus can play a guiding role in deep ore-prospecting work.
出处
《物探与化探》
CAS
CSCD
2013年第3期453-460,共8页
Geophysical and Geochemical Exploration
基金
国家自然科学基金项目(U0933605)
中国地质调查局工作项目(1212011220248)
放射性地质与勘探技术国防重点学科实验室开放基金项目(REGT1204)
江西省数字国土重点实验室开放基金项目(DLLJ201302)
关键词
重力勘探
磁法勘探
重、磁坡度异常提取
成矿预测
相山
gravitational prospecting
magnetic prospecting
abnormal surplus gravity and abnormal magnet slope
ore prognosis
Xiang-shah
