BO 
In 1888 the Warden reported the field briefly as “ dormant,” in which condition 
it may be said to remain, although the Charters Towers Warden mentions 4G1 oz. of 
Woolgar gold purchased by the banks in 1890. 
“ Galena carrying silver is found in abundance on the [Gilbert] fleld. Near 
Gilberton three parties of men are opening galena lodes, from which some good assays 
of silver have been obtained. At the Percy River rich bismuth ore is found in gullies 
formerly worked for alluvial gold. Three men worked this ground for some time, and 
stacked a large quantity of washdirt containing ore. They also discovered a reef carrying 
the ore in small quantities. The absence of a market for the ore in the colonies, and 
the uncertainty as to the ])riee obtainable in England, have had the effect of discouraging 
the miners, and work has now been discontinued.”* The ore referred to is the car- 
bonate of bismuth, and what samples I have seen of it are almost chemically pure. 
“ The principal lodes are found towards Gilberton, viz. — Galena, large, carrying a good 
percentage of gold and silver, and pure galena; bismuth, and bismuth and copper; 
copper; silver, with lead and sulphur; silver; silver and antimony; and soon. They 
are of various colours, and some of the lodes are of groat width, and traced for miles 
along the surface of the ground. Tin is also met with, tin and copper having been 
worked on the east of the Einasleigh Eiver.”t “ Silver in galena lodes, with a 
percentage of gold and indications of copper, exists on the Woolgar.”]: 
COEN GOLD FIELD. 
As an alluvial field, the Coen had a short existence (from February to July, 1876). 
The country-rock is granite, greywaeke, mica-schist, and quartzite. The alluvial gold 
was poor in quality and insufficient iu quantity. Several reefs occur in the neighbour- 
hood of the diggings. One of these, the Llankelly, has been worked profitably for a few 
years back. 
NORMANBY AND MARENGO GOLD FIELDS. 
Normaxby. 
There are no less than three goldfields iu the Colony known as Ilormanby. The 
one here referred to lies about forty miles south of Bowen, on the heads of the Dart 
and Grant, tributaries of the Broken River. 
The goldfield occupies a portion of the Clarke Range. That range consists 
almost entirely of metamorphic rocks. That these have undergone metamorphism, 
followed by extensive denudation, prior to the date of the Lower Bowen River forma- 
tion, is proved by the relations they bear to the Bowen River Coal Field. In some places 
shales, slates, quartzites, grcywackes, lydian stone, and mica and hornblende schists are 
met wfith; and there is little doubt that the whole tableland was originally comjmsed of 
stratified rocks. In the immediate neighbourhood of Normanby, however, the occur- 
rence of stratified rocks is notably rare, and the country-rock mostly consists of a species 
of porphyry, composed of quartz, black mica (sparsely), and crystals of schorl. The whole 
rock is mixed up with minute crystals and streaks of pyrites, and streaks and veins of ser- 
pentine. Occasional sections show a passage from greywaeke to the rock just described. 
In 1872-3, the Hibernia, Grace Darling, Marquis, AFelcome, Star of Hope, 
Albion, New Zealand, Venture, and other reefs were at work, and everything went well 
till the water level was reached, crushings of from 1 oz. to 2 ^ oz. being the usual 
return. At the water level, however, “mundic” took the place of the easily reduced 
“ brownstone,” and as at the time the treatment of complex auriferous ores was little 
understood, the claims one after another were abandoned, although the atone assayed 
* Warden’s Report in Report of the Department of Mines for 18SI. 
t Mr. Warden Samwell’s Report in Report of the Department of Mines for 1883. 
t Mr. Warden Samwell’s Report in Report of the Department of Mines for 1886. 
