DESCRIPTIONS OF TIN MINES. 
51 
OTHER PORTIONS OF THE KELT. 
Considerable prospecting was done in the northern part of the area by Messrs. Carpenter 
id Rudisill in 1904. This work consisted in the excavation of trenches and shallow pits 
here the presence of float gave promise of tin in place. The results have been particu- 
rly successful, for in nearly every case they have located a dike carrying tin. On the 
ace of William Carpenter, about 11 miles N. 20° E. of the town of Kings Mountain, the 
lation of the pegmatite to the gneissic granite is well shown. Here, particularly, spodu- 
ene is a prominent constituent of the dikes. A shallow pit on a dike just beyond the 
nit of the granite shows the pegmatite to contain more mica and cassiterite where it 
its the schist, probably amphibolite, than where it cuts the granite. A dike composed 
most wholly of quartz and feldspar cuts the granite at this place. Its interesting internal 
ructure is shown in fig. 7. 
On property owned by Henry Carpenter, about H miles northeast of Long Shoals, a pit 
eposes an irregular dike of pegmatite about 6 feet wide, striking N. 25° E. The normal 
■:, si,\;/^ W 1 / w N - v 
m 
Granite 
i i , i i i i 
lillVn 
Feldspar 
Scale of inches 
6 
Quartz 
G. 7. — Sketch of pegmatite dike, showing internal structure. On property of William Carpenter, 
Gaston County. 
lartz-mica pegmatite with some feldspar occurs on both sides and in the center is a band 
quartz-feldspar rock of coarse grain. It is probably an illustration of the aqueo-igneous 
■ veinlike character of pegmatite. The outer portions of this dike carry abundant cas- 
ierite, probably 10 per cent or more. The specimen illustrated in PL III, A, p. 42, is 
om this locality. 
About a mile farther northeast a number of pits have been put down on property belong- 
g to Ephraim Carpenter. Together with natural exposures by streams, these workings 
ow the existence of what is probably a single continuous dike for nearly half a mile. The 
sneral course of the dike is N. 20° E. and the dip is about 80° W. The slight curvature 
the line of outcrop is probably no more than is accounted for by the inclination of the dike 
id the contour of the surface. The dike is 5 to 8 feet wide, and in all the pits shows an 
nount of tin which ought to make working profitable. Whether this is an indication that 
ie whole dike carries considerable cassiterite or whether the pits, located where the float 
ks richest, struck an ore shoot in each case is impossible to decide without further develop- 
bnt. The possibility that the dike contains an ore shoot conforming with the surface is so 
