Zircons - Rare Earth Elements in Ultramafic and Mafic Rocks and their Minerals - page 165

Table 4.9 Average REE compositions of zircons from some placer deposits (ppm).

West Siberia province (Russia)

[Rikhvanov et al., 2001]

Placer deposit's number

Element 1 (4) 2 (3) 3 (13) 4 (17) 5 (32) 6 (4) 7 (17) 8 (10) 9 (4) 10 (32) 11 (2)

La 20,2 4,00 28,0 20,2 57,7 237 20,2 92,50 10,60 57,7 439

Ce N.d. N.d. N.d. 45,5 37,5 68,0 45,5 N.d. N.d. 37,5 347

Sm 48,5 44,2 39,8 26,7 25,1 45,0 26,7 76,9 62,1 25,1 83,5

Eu N.d. N.d. 6,80 5,50 8,90 20,0 5,50 N.d. 7,60 8,90 54,0

Tb N.d. N.d. 11,9 28,0 N.d. N.d. 11,9 49,50

N.d. N.d. N.d.

Yb 426 235 330 326 464 365 326 330 240 464 616

Lu 43,6 75,4 84,8 88,2 167 105 88,2 104 74,80 167 256

(La/Yb) n 0,032 0,011 0,057 0,042 0,084 0,438 0,042 0,189 0,030 0,084 0,481

Note. 1-4 - Tugansky deposit: 1 - Malinovsky section, 2 - North section, 3 - Yuzhno-Alexandrovsky section,
4 - Kuskovo-Shiriaevsky section; 5 - Georgievsky deposit; 6 - Tarsky deposit; 7 - Tugansky deposit (colorless, yellow,
and brown zircons); 8 - Georgievsky deposit (colorless, and painted zircons); 9 - Tugansky deposit (brown zircons);
10 - Georgievsky deposit (colorless zircons); 11 - Georgievsky deposit (painted zircons). In brackets - quantity
of analyses.

Tugansky deposit,
Malinovsky section

Tugansky deposit,
Juzhno-Alexandrovsky sectio

Tugansky deposit,
North section

Tugansky deposit,
Kuskovo-Shiriaevsky section

Georgievsky deposit Tarsky deposit

painted

brown

yellow

colorless

colorless

Tugansky deposit Georgievsky deposit

Figure 4.13 Chondrite-normalized REE patterns for zircons from some placer deposits (Western
Siberia, Russia) (data Table 4.9).