ransome.] LODES OF POUGHKEEPSIE GULCH. 195 
The country rock, which is rhyolitic flow-breccia, of rather anclesitic 
aspect, is sheeted and traversed by veinlets parallel to and for a dis- 
tance of several feet from the large lode. A small mill, equipped with 
crusher and rolls and run by water power, was formerly operated at 
the mouth of the upper tunnel. 
Saxon mine. — This lode is apparently the same as that first followed 
in the lower tunnel of the Amador. Its strike is N. 30° E., with a 
steep southeast dip. The mine was working in 1879, and in 1890 is 
credited with a product ion of over $30,000. The workings were not 
accessible in 1899. The ore on the dump showed galena, sphalerite, 
■trahedrite, chalcopyrite, and pyrite, in a quartz gangue. 
Alaska mine. — Situated about a third of a mile a little north of 
west from Lake Corao, this mine is best known Prom the occurrence 
in it of an argentiferous galenobismuthite named alaskaite by Koenig. 1 
The mine was working in L879, and in L881, when Professor Koenig 
30llected his specimens, had two adits. The alaskaite occurs with 
&etrahedrite and chalcopyrite in a gangue of quartz and barite, the 
latter being abundanl in the richerore. Zinc blende and galena were 
not seen by Koenig, bul they are abundant on the dump and in por- 
]ions of the lode now accessible. Kaolin also was noted, intimately 
associated with the ore minerals. In 1887 the Mini reports credit the 
nine with a production of 835,058, but in L888 it was not producing. 
[ was informed on reliable authority that about $90,000 had been pro- 
luced in all, chiefly from one large pocket. The Alaska lode strikes 
ibout X. 75° E., with a dip of about 75° to the southeastward. At 
east three veins intersect at or near the old shaft through which the 
nine was worked; and another lode, the May Belle, which has been 
aiperficially prospected, lies just west of and nearly parallel with 
he Alaska lode. All these lodes carry some rhodonite and rhodo- 
shrosite crystallized with the quartz. The country rock is andesite. 
In 1900 the mine was being reopened and it was possible to see 
omething of the old workings, although still partly tilled with ice. 
ike many other lodes in this region, the Alaska is less prominent 
lifter ground than the croppings would indicate. It contains much 
Itered country rock traversed by stringers of quartz. It is in the 
oft altered country rock, near the quartz, that the richest ore, 
laskaite, occurs as bunches of varying size. Pieces of this ore may 
arry as much as 3,000 ounces of silver per ton. The solid vein 
uartz, on the other hand, is low grade, carrying pyrite, galena, sphal- 
rite, and some tetrahedrite, associated with rhodonite, barite, and 
hodochrosite. 
No ore was extracted from the main workings in 1900, but. good 
ismuthiferous ore, in small bunches, was being taken out from a 
] )wer tunnel on the Acapulco claim, which joins the Alaska claim on 
1 tie east and is under the same ownership. 
1 Proc. Am. Philos. Soc, Vol. XIX, pp. 472-477; also Vol. XXII, p. 211. 
