青海循化地区高精度磁异常特征及找矿预测

王美丁, 马见青

The high-precision magnetic anomaly characteristics and prospecting forecast in Xunhua region of Qinghai

Mei-Ding WANG, Jian-Qing MA

表1 调查区岩(矿)石磁参数测定统计结果

岩矿石名称 测定块数 κ/(4π×10-5SI) Mr/(10-3A/m) 变化范围 平均值 变化范围 平均值 变粒岩 9 48.85~2655.12 987.94 5.94~473.15 138.13 变玄武岩 7 79.58~1440.55 576.49 17.18~149.72 56.4 变英安岩 5 105.78~525.08 228.04 23.58~289.51 89.81 玢岩 2 17.07~109.92 63.5 35.44~44.32 39.88 大理岩 2 34.86~49.82 42.34 9.14~40.08 24.61 二长花岗岩 12 21.14~320.11 90.69 21.07~330.89 56.7 粉砂质板岩 12 22.64~212.18 97.45 9.03~91.54 37.09 灰岩 18 29.04~230.75 81.26 7.77~201.87 40.89 花岗闪长岩 48 7.59~1230.3 187.73 2.99~505.93 88.66 辉绿岩 7 92.55~7450.87 1863.41 48.26~540.67 160.85 辉石岩 13 22.54~7028.25 1597.27 7.22~1110.1 285.27 辉长闪长岩 14 72.6~5184.95 1721.69 12.22~7905.13 1528.57 辉长岩 17 41.0~3506.9 856.95 16.12~4183.18 387.94 钾长花岗岩 10 19.94~178.21 81.27 5.87~89.88 28.05 砾岩 4 27.38~44.7 51.3 9.04~18.29 14.11 砂岩 91 10.12~4417.4 136.17 1.68~265.9 33.64 闪长岩 51 6.34~3214.76 684.03 10.07~7965.5 346.34 石英砂岩 8 21.38~166.9 55.79 10.39~325.45 58.47 石英闪长岩 12 77.53~1839.16 487.16 35.5~663.64 235.46 似斑状二长花岗岩 8 27.37~99.76 58.24 9.24~20.9 17 斜长角闪岩 36 20.37~1531.5 199.62 7~1871.96 92.4 长石石英砂岩 3 36.33~101.03 61.75 8.3~35.62 21.06