GOLD DEPOSITS. 63 
List of minerals constituting or accompanying the gold deposits — Continued. 
Name. 
ORE minerals— continued. 
Arsenopyrite 
Leucopyrite. 
Tetrahedrite. 
Bismuth. . . . 
Bismutite. . . 
Bismite 
Locality. 
Occurrence. 
Tetradymite. 
Nagyagite . . . 
Altai te 
Molybdenite. 
Ilmenite 
Hematite . . 
Magnetite. 
Cassiterite. 
Kings Mountain i Fissure filling. 
Asbury * Do. 
do i Do. 
Kings Mountain j (?) 
Brewer (?) 
Asbury Fissure filling. 
Kings Mountain ; Secondary. 
Asbury j Do. 
Brewer j Do. 
Asbury -..., Fissure filling. 
Kings Mountain 
do 
Haile 
Ferguson 
Other quartz veins a. 
Brown (?) 
Schlegelmilch (?) 
Quartz veins a 
Jones tin mine & 
Brewer 
Do. 
Do. 
Replacement. 
Fissure filling ; 
Do. 
Replacement. 
Do. 
Fissure filling. 
Replacement. 
Do. 
nd replacement (?). 
a Deposit not known to be auriferous. 
b Vein is auriferous, but of very low grade. 
INSCRIPTION OF TIIK C.\N(,IK MINERALS. 
Quartz is of course the predominant gangue mineral. In the veins it is generally milky 
white, but in some cases is so clear that in large masses it appears dark. It is crowded 
with fluid inclusions, some of which also contain gas and a solid. The mineral shows 
neither fibrous structure nor crystalline faces. It occurs in irregular interlocking grains, 
showing a texture similar to that of granite. For this reason the quartz of many of the 
veins appears granular or " sugary," as if crushed. All the evidence points toward deep 
seated deposition of the quartz. 
As a replacement mineral the quartz exhibits much the same characteristics as in the 
veins. It is more apt to be bluish and appears to hold fewer fluid inclusions. The grains 
are usually polygonal, presenting a mosaic appearance. In the wall rocks of veins the 
quartz appears most commonly as very small lenses, while in the large replacement bodies 
it composes the greater part of the altered rock. 
Sericite is probably next in importance. At the Haile, Colossus, and Ferguson mines 
it occurs as minute needles and scales, especially along certain planes. It is probably 
derived from the original feldspar of the rock, and where silicification is extreme is replaced 
by quartz. At the Brown and Schlegelmilch mines it is scattered through the wall rock. 
At the Brewer mine it appears to be forming from the unknown mineral already referred 
to (p. 22). Sericite forms the great mass of the ore body at the Blackmon mine. 
Biotite is nearly as abundant as sericite. It is absent at the Haile and Brewer mines, but 
at the Colossus and Ferguson mines is sparingly present in minute scales of irregular shape. 
At the other mines where it has been found it occurs as irregular flakes and clusters derived 
from the uralite of the amphibolite. In all cases the biotite possesses the clear brown color 
characteristic of contact-metamorphic biotite. Minute shreds of a mineral corresponding 
to clinochlore are plentiful in specimens from the Haile ore body. The mineral appears to 
have been the result of vein action, but may possibly have resulted from the decomposition 
