Kenya detection limits

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These were not determined. Table 8 of Hackman et al. (1989) is reproduced below to show the differences between the analyses produced by the two laboratories. In the geochemistry database, absent data is recorded as a blank in character fields and as -1 in numeric fields.

Table 8: Threshold (upper) and background (lower) levels in relation to drainage basin lithology groups (see Explanation of field codes for explanation of letter codes).

(i) All Data

  Zn Pb Ni Co Mn Cu Sr Ba Li
QG 15041 201 5014 4012 3000468 8018 15532 500118 195
OB 10045 161 7017 5015 1200438 6023 -33 -132 -5
X 8035 102 3513 2712 1500510 5017 15030 240114 -5
SK 17037 201 60020 -14 3000384 20025 25046 500132 -5
MBU 10038 -1 100021 -17 2000453 17023 25036 -130 -5
KL 15044 202 7015 3512 1600476 4515 25039 350107 226
MKV 14557 2513 8029 5224 50001190 4017 400121 300130 205
N 15582 3518 11037 10039 70002247 6529 100093 450213 152

(ii) Mines

  Zn Pb Ni Co Mn Cu Sr Ba Li
D 20030 3010 10021 5016 2500555 4013 60071 30086 302
LM 8026 307 5016 309 1100295 308 35074 20055 122
M 8035 2110 3518 2816 2000629 3013 20059 20588 264
P 10046 4017 10027 2616 30001257 2512 35075 300135 102
SO 12052 3012 5025 5120 4000972 -16 700110 400132 203

(iii) Geosurvey

  Zn Pb Ni Co Mn Cu Sr Ba Li
D 11041 401 6015 3514 2000427 -17 15027 400103 -3
LM 14041 203 4216 2712 -528 4515 20049 400126 -6
M 12542 201 4015 7013 -422 5519 13530 350103 305
P 20069 404 4010 5014 50001184 -13 16031 500161 -7
SO 20062 152 7014 7016 -752 6017 19063 500181 -7