East Malartic chert gold

chert below painted line. Dip at 55 degrees

chert above painted line

white quartz pods in chert

Average chemical composition of 22 samples (Kerrich, 1983)

              %

SiO2    64.87

TiO2     0.4

Al2O3   12.55

Fe2O3  4.5

MgO      2.32

CaO      3.47

K2O     3.91

Na2O   3.95

P2O5   0.13

          ppm

Au      12.88

Cr    157

Ni     66

Sr    656

Ba   605

Zn   37

Cu    20

Rb   67

Y    12

Zr    117

Nb    17