滇西保山地块黑牛凹金矿区辉绿玢岩地球化学特征、锆石U-Pb年龄及地质意义

罗应,卢映祥,刘学龙,薛顺荣,王帅帅,李振焕,张昌振,陈建航

Geochemical Characteristics，Zircon U-Pb Age and Geochronological Significance of Diabase in Heiniu’ao Gold Deposit，Baoshan Block，Western Yunnan

Ying LUO,Yingxiang LU,Xuelong LIU,Shunrong XUE,Shuaishuai WANG,Zhenhuan LI,Changzhen ZHANG,Jianhang CHEN

表2 黑牛凹金矿区辉绿玢岩LA-ICP-MS锆石U-Pb年龄

Table 2 LA-ICP-MS zircon U-Pb age of diabase porphyrite in Heiniu’ao gold deposit

分析点 元素含量/（×10-6） Th/U 比值 年龄 总Pb Th U 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ HNA7-06-03 61.46 368.65 397.44 0.93 0.0562 0.0030 0.2652 0.0140 0.0343 0.0007 461.16 115.73 238.87 11.27 217.68 4.23 HNA7-06-04 45.00 252.52 324.24 0.78 0.0528 0.0037 0.2424 0.0144 0.0343 0.0007 320.43 162.02 220.40 11.81 217.61 4.55 HNA7-06-08 119.74 693.92 759.57 0.91 0.0535 0.0027 0.2497 0.0122 0.0340 0.0006 350.06 114.80 226.35 9.90 215.73 3.82 HNA7-06-11 28.19 145.00 805.00 0.18 0.0482 0.0021 0.2223 0.0099 0.0330 0.0004 200.08 68.46 203.79 8.22 209.22 2.46 HNA7-06-13 27.47 63.90 770 .00 0.08 0.0490 0.0025 0.2233 0.0109 0.0330 0.0005 146.38 113.87 204.65 9.09 209.53 2.88