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Table 2 Trace elements (ppm)

From: Spheroidal weathering of basalt from Gebel Qatrani, Fayum Depression, Egypt

  1 2 3 4 5 6 7 Av
Core-stone
V 300 280 290 300 310 290 300 295.7
Cr 85 88 90 88 85 90 85 87.3
Co 55 52 53 55 54 55 54 54.0
Ni 44 43 45 46 44 45 45 44.6
Zn 75 80 77 75 80 78 80 77.9
Rb 20 21 21 20 20 21 22 20.7
Sr 360 365 370 350 365 360 385 365.0
Y 35 35 36 35 36 36 35 35.4
Zr 220 219 220 219 220 220 230 221.1
Ba 225 230 230 225 220 230 222 226.0
La 22 23 22 23 21 22 22 22.1
Ce 50 51 50 51 52 50 51 50.7
Pb 3 3 3 2 3 3 3 2.9
Th 3 3 3 2 3 2 2 2.6
Shell around core-stone
V 265 248 257 265 275 257 265 261.7
Cr 79 82 74 82 79 78 85 79.9
Co 55 52 53 55 54 55 54 54.0
Ni 36 35 39 38 36 37 46 38.1
Zn 58 73 70 68 73 71 81 72.0
Rb 10 11 10 10 10 11 11 104
Sr 334 296 301 294 286 295 295 300.1
Y 35 35 36 35 36 36 35 35.4
Zr 222 221 222 221 222 222 232 222.9
Ba 251 253 254 251 249 245 250 250.4
La 22 23 22 23 21 22 22 22.1
Ce 51 52 51 52 53 51 52 51.2
Pb 3 3 3 2 3 3 3 2.9
Th 3 3 3 2 3 2 2 2.6