CU, AU, AND ZN-PB SKARN DEPOSITS (MODELS 18b,c; Cox and ...

CU, AU, AND ZN-PB SKARN DEPOSITS (MODELS 18b,c; Cox and ... CU, AU, AND ZN-PB SKARN DEPOSITS (MODELS 18b,c; Cox and ...

pubs.usgs.gov
from pubs.usgs.gov More from this publisher
28.03.2013 Views

Table 3. Summary ranges of geochemical data for trace elements in fresh and variably altered rocks from northern part of New World Cu-Ag-Au district, Mont. [Data, in ppm unless otherwise noted, from Johnson (1991, Table F-1). Samples include drill core, outcrops, and ore dumps. Fire assay and atomic absorption methods. Mean based on number of samples in which element was detected at concentrations above detection limits; --, not detected] Element Detection Number of Minimum Maximum Mean Limit Samples Au Cu Ag Te Bi As Pb Zn Ni Co Mo Cr Se Hg(ppb) Sb W Ba Mn Tl 0.005 1 .2 .2 1 5 2 1 1 1 1 1 5 5 5 10 20 1 .5 108 110 105 102 85 78 96 111 102 93 94 111 43 108 43 46 73 111 38 0.006 -- -- -- 2

Table 3. Summary ranges of geochemical data for trace elements in fresh <strong>and</strong> variably altered<br />

rocks from northern part of New World Cu-Ag-Au district, Mont.<br />

[Data, in ppm unless otherwise noted, from Johnson (1991, Table F-1). Samples include drill core, outcrops,<br />

<strong>and</strong> ore dumps. Fire assay <strong>and</strong> atomic absorption methods. Mean based on number of samples in which element<br />

was detected at concentrations above detection limits; --, not detected]<br />

Element Detection Number of Minimum Maximum Mean<br />

Limit Samples<br />

Au<br />

Cu<br />

Ag<br />

Te<br />

Bi<br />

As<br />

Pb<br />

Zn<br />

Ni<br />

Co<br />

Mo<br />

Cr<br />

Se<br />

Hg(ppb)<br />

Sb<br />

W<br />

Ba<br />

Mn<br />

Tl<br />

0.005<br />

1<br />

.2<br />

.2<br />

1<br />

5<br />

2<br />

1<br />

1<br />

1<br />

1<br />

1<br />

5<br />

5<br />

5<br />

10<br />

20<br />

1<br />

.5<br />

108<br />

110<br />

105<br />

102<br />

85<br />

78<br />

96<br />

111<br />

102<br />

93<br />

94<br />

111<br />

43<br />

108<br />

43<br />

46<br />

73<br />

111<br />

38<br />

0.006<br />

--<br />

--<br />

--<br />

2<br />

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!