AMT在云南某铝土矿勘查中的响应特征研究

Response Characteristics Study of AMT on Prospecting of one Yunnan Bauxite

结合云南某沉积型铝土矿区地质资料及岩芯物性参数,建立了二维找矿模型。对此模型进行了AMT模拟计算,确定了反演模式,进而对矿区内的AMT实测数据进行反演、分析解释,推测了一定的赋矿异常靶区。研究结果表明:理论计算和实测反演结果互相吻合,建立符合矿区地质的找矿地电模型并计算AMT响应,可以有效的指导AMT测深反演及解译工作,有助于降低物探多解性,提高解译准确度。在今后的固体矿产勘查中,正反演综合研究将会使物探发挥更重要的作用。

Two-dimensional prospecting model was established according to geological data of one Yunnan sedimentary bauxite and physical property parameters of cores,and AMT analog computation was carried out for the model,therefore the inversion model was confirmed,and then the inversion model,analytical interpretation of AMT measured data inside the mining area was carried out,and a certain mineralization anomaly target was speculated.Study results show:theoretic calculation and the measured inversion results were matched with each other,ore-prospecting earth-electricity model conforming to the geology of the mining area wast established,and AMT response was calculated,therefore AMT sounding inversion and interpretation work can be guided effectively,it is contribute to reduce non-uniqueness of inversion of geophysical exploration,and to improve the accuracy degree of interpretation.Forward and inversion comprehensive study will plays more important role in geophysical exploration of solid minerals in the future.