Upper crustal abundances of trace elements: A revision and update

摘要: Abstract We report new estimates of abundances rarely analyzed elements (As, B, Be, Bi, Cd, Ge, In, Mo, Sb, Sn, Te, Tl, W) in the upper continental crust based on precise ICP-MS analyses well-characterized crustal samples (shales, pelites, loess, graywackes, granitoids and their composites) from Australia, China, Europe, New Zealand North American. Obtaining a better understanding abundance associated uncertainties these is important placing constraints bulk composition and, that, whole Earth models element cycling generation. also present revised some more commonly trace (Li, Cr, Ni, Tm) that vary by > 20% compared to previous estimates. The are mainly significant ( r 2  > 0.6) inter-element correlations observed clastic sediments sedimentary rocks, which yield elemental ratios used conjunction with well-determined for certain key place concentrations elements. Using well-established La (31 ppm), Th (10.5 ppm), Al O 3 (15.40%), K (2.80%) Fe (5.92%), lead B = 47 ppm, Bi = 0.23 ppm, Cr = 73 ppm, Li = 41 ppm, Ni = 34 ppm, Sb = 0.075, Te = 0.027 ppm, Tl = 0.53 ppm W = 1.4 ppm. No exist between Mo Cd other probably due enrichment organic carbon. thus calculate assuming consists 65% granitoid rocks plus 35% rocks. validity this approach supported similarity SiO , calculated way given Rudnick Gao [Rudnick, R., Gao, S., 2003. Composition crust. In: Rudnick, R.L. (Ed.), Crust. Holland, H.D., Turekian, K.K. (Eds.), Treatise Geochemistry, vol. 3. Elsevier–Pergamon, Oxford, pp. 1–64.]. obtained Mo = 0.6 ppm Cd = 0.06 ppm. Our data suggest ∼ 20% increase Tm, Yb Lu reported