151 
{E.). Complete Analysis, No. 413, Phosphate Ore from Lode. 
Analysis— 
P 2 O 5 31*54% 
Fe^Oa 54*36% 
FeO 4*86% 
MnO 0*60% 
MgO 0*22% 
CaO 0*18% 
H 2 O + (110 degrees C.) 7*6*2% 
H 2 O - 0*38% 
SiOa 0*61% 
AI 2 O 3 nil 
Cr 203 nil 
NiO nil 
CoO nil 
CuO . nil 
AS 2 O 5 nil 
SO 3 nil 
TiOa nil 
CO 2 trace 
Total ... ... 100*37% 
Formula (calculated to SiOg and HgO - , free) = 14 Fe PO 4 , Fe 3 P 208 , lOFe (OH) 3 . 
Indicating dufrenite (basic phosphate of iron). 
[22.9.13.] 
THE HSTDIGO PIOHEER MIJSTE, IHDIGO CREEK. 
By J. P. L. Kenny, B.C.E., Assistant Field Geologist. 
The Indigo Pioneer mine, on the west side of Indigo creek, is the 
result of a recent discovery of auriferous veins in granite made by 
Mr. George Archer, of Chiltern. Gold has been obtained for a distance 
of half-a-mile, and the south end of the auriferous strip of country 
proved so far is situated 4 chains S. 33° E. from the west corner of 
allotment 9 m, parish of Wooragee Korth, county of Bogong. The strike 
of the auriferous strip of country is K. 42° W. The country rock 
is granite, and the gold occurs in small quartz and pegmatite veins, 
which strike K. 10° W. to IST. 20° W., and dip from 40° to 50° west. 
Samples were taken at three points along the line, and assayed at the 
Geological Survey laboratory. 
Fourteen chains to the south-east two veins have been opened up. 
The first vein is 12 in. wide. A sample (Ko. 706) assayed— 
Gold . . . . 3 dwt. 22 gr. per ton. 
Silver . . . . 7 dwt. 12 gr. per ton. 
A sample (Ko. 707) was also taken of the decomposed granite and 
pegmatite adjacent to the vein, and assayed— 
Gold . . . . 3 dwt. 6 gr. per ton. 
Silver . . . . 2 dwt. 15 gr. per ton. 
Thirty feet to the south-east another sample (Ko. 708) was taken 
from a depth of 4 ft., and assayed— 
Gold . . . . 8 dwt. 19 gr. per ton. 
Silver . . . . 1 dwt. 7 gr. per ton. 
