Full text: The Elements of economic geology

ORES OF GOLD 
43 
k 
haft was sun 
Other where similar conditions recur. co and i 
iclinal axis, or ] ft was ¢ 
oe Fi oy was being mined py being shallow, 
down h : t saddle. The field, bunteny as for long the 
down to he mts depth of 4500 feet, and of gold declined 
tes a in the world. The was too high 
tn d ih robably because the tempe to Sold OF Castles 
for rien Ida sition. In the neighbouring but the lodes 
og: : diggings» were os upper part 
a ear 
ation, ee 
Id drs, eyed by denudat lower parts have ) 
underground, f Nova Scotia have been Jeseribed i! 
Maley dde Cn Mem. 20, 1912), but N 
o d like 
low grade. tz-veins arrange 1 
isolated quartz ical or steeply 
a A 
ole ke. ‘The typical Star. Wood's Point. The dykes 
i; oe it po at the Morning Star, Woo oy shrinkage caused 
ns Site ian slate; as they cooled ¢ te forming floors 
horioons Leracks which wert flea Wh quarts, fore Fangs 
hich | > vertical section of the a firmly frozen 
of 0 ad : * Oconsionally. where the dy tha slate, and the 
: the il a crack would extend CE dyke. A small 
. tz-loos rose a few feet beyond | o, Ballarat. Less 
lade 1 d was worked at Little Bendig es, where the gold 
ng fours of quartz occur at the Al 3 rrtuet into the 
Was irregular in distribution, as 3 wa hich converted the 
uartz by superheated solutions w osaic of secondary 
oor h bene into propylite, and Samed od chlorite. The gold 
: tty d felspar, epidote, zoisite, an opylitized bands. 
ib where the quartz-floors cross ry pr 74 Berezovsk in 
. occur in the goldfie ite known as 
the ar Mone in dykes of a micrograni 
i . illustrates 
haters Towers Goldfield in Jromnsna) i co untry 
. . oe isol ted quartz- AEDs radia 
a rae of option of fol a circular series of short 
m  UATLE. ] 
; filled by gold-q Home 
eanihich have ben fled by gold quarts.
	        
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