Parker R L.、Oldenburg D W.提出密度界面与磁性界面的正反演法,该方法在频率域计算,计算速度快,是一种连续界面正反演方法。但是受到方法以及资料的限制,前人运用视磁化强度填图法时通常采用单界面无限延深或水平双界面磁性体模型进...Parker R L.、Oldenburg D W.提出密度界面与磁性界面的正反演法,该方法在频率域计算,计算速度快,是一种连续界面正反演方法。但是受到方法以及资料的限制,前人运用视磁化强度填图法时通常采用单界面无限延深或水平双界面磁性体模型进行反演计算,在地形(或磁性界面)起伏较大的地区往往得不到理想效果。针对这一问题,提出一种起伏双界面模型快速视磁化强度填图的新思路,即结合功率谱分析法反演上下起伏界面深度约束下的快速视磁化强度填图。理论模型计算结果说明,功率谱分析约束下的Parker法视磁化强度填图双界面起伏模型相较于水平界面模型提高了反演结果的精度。将该方法应用于小秦岭地区,圈定了与钼、金成矿密切相关的隐伏中生代花岗岩体11个,预测了成矿有利区域,为后期找矿工作提供了地球物理依据。展开更多
For our investigation we have 235 measurements done in the east part of Democratic Republic of Congo by P.Herrinck during a magnetic survey including the graben region from the parallel joining Goma city and Mahagi ci...For our investigation we have 235 measurements done in the east part of Democratic Republic of Congo by P.Herrinck during a magnetic survey including the graben region from the parallel joining Goma city and Mahagi city, the region between Albert and Aka lakes, and the route from Aba to Kinsagani. During the surveys the density of recording points has been selected according to the importance of anomalies. In this way, the offset was 1 km where the disturbance was high in Goma city and 20 km have been sufficient along the route from Aba to Kinsagani. For the topographic and isostatic reductions only one cartographic document has been chosen that was the international map of the scale 1/1 000 000 which presents a certain characteristic of homogeneity.展开更多
文摘Parker R L.、Oldenburg D W.提出密度界面与磁性界面的正反演法,该方法在频率域计算,计算速度快,是一种连续界面正反演方法。但是受到方法以及资料的限制,前人运用视磁化强度填图法时通常采用单界面无限延深或水平双界面磁性体模型进行反演计算,在地形(或磁性界面)起伏较大的地区往往得不到理想效果。针对这一问题,提出一种起伏双界面模型快速视磁化强度填图的新思路,即结合功率谱分析法反演上下起伏界面深度约束下的快速视磁化强度填图。理论模型计算结果说明,功率谱分析约束下的Parker法视磁化强度填图双界面起伏模型相较于水平界面模型提高了反演结果的精度。将该方法应用于小秦岭地区,圈定了与钼、金成矿密切相关的隐伏中生代花岗岩体11个,预测了成矿有利区域,为后期找矿工作提供了地球物理依据。
文摘For our investigation we have 235 measurements done in the east part of Democratic Republic of Congo by P.Herrinck during a magnetic survey including the graben region from the parallel joining Goma city and Mahagi city, the region between Albert and Aka lakes, and the route from Aba to Kinsagani. During the surveys the density of recording points has been selected according to the importance of anomalies. In this way, the offset was 1 km where the disturbance was high in Goma city and 20 km have been sufficient along the route from Aba to Kinsagani. For the topographic and isostatic reductions only one cartographic document has been chosen that was the international map of the scale 1/1 000 000 which presents a certain characteristic of homogeneity.
