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时间:2020-03-28
《成都理工大学-应用地球化学实验-原生晕垂直分带序列的确定.doc》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、实习二原生晕垂直分带序列的确定表2—1100线指示元素线金属量表元素标高250(米)150(米)50(米)—50(米)—150(米)Pb79.8342.65259.4444.598.77Zn116.5256.71323.5154.728.13Ag0.71010.14500.13590.14760.1084Cd0.32402.4640.26321.1920.1012Sn0.34870.33300.87920.67950.3870As2.3241.1452.9691.5921.36Cu1.4314.9
2、682.9861.6333.515Mo0.04820.1370.08190.04410.1953表2-2标准化线金属量表元素标准化系数250(米)150(米)50(米)—50(米)—150(米)Pb179.8342.65259.4444.598.77Zn1116.5256.71323.5154.728.13Ag1000710.1145135.9147.6108.4Cd10032.4246.426.32119.210.12Sn1000348.7333879.2679.5387As100232.411
3、4.5296.9159.2136Cu100143.1496.8298.6163.3351.5Mo100048.213781.944.1195.3总计1711.251572.062301.761512.191225.22表2-3分带指数表元素标高250(米)150(米)50(米)—50(米)—150(米)Pb0.04670.02710.11270.02950.0072Zn0.06810.03610.14050.10230.023Ag0.4150.09220.0590.09760.0885Cd0.01
4、890.15670.01140.07880.0083Sn0.20380.21180.3820.44930.3159As0.13580.07280.1290.10530.111Cu0.08360.3160.12970.1080.2869Mo0.02820.08710.03560.02920.15943.列出初步的分带序列(自前缘至尾部)为:(Ag,As)—(Cd,Cu)—(Pb,Zn)—(Sn)—(Mo)计算变异性指数梯度△G△GAg=-20.48<△GAs=-5.43△GCd=-26.32<△GC
5、u=-2.68△GPb=-12.9<△GZn=-1.534.对于同一标高出现两个以上元素分带指数最大值,则进一步计算G及△G值,根据变异性指数梯度值(△G)大的值排在分带序列较低的位置,变异性指数梯度值小的值排在分带序列较高的位置,所以完整的原生晕垂直分带序列(自前缘至尾部)为:Ag—As—Cd—Cu—Pb—Zn—Sn—Mo
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