The Mother Lode region of California . nd on the foot-wall side of thezone was 15 feet wide, but its length has not been determined. Theseore-shoots are known to overlap 25 feet at least, and probably much instance of irregularity was noticed in the Mahoney Mine 30 feet 5—MB 66 CALIFOENIA STATE MINmG BUREAU. above the 900-foot level, where is found what appears to be a displace-ment of a banded vein 15 feet in width, which, together with the inclosedslates, is contorted and cut off abruptly, the sheared end abutting againsta solid vein of quartz 20 feet in thickness. (See Fig. 18.
The Mother Lode region of California . nd on the foot-wall side of thezone was 15 feet wide, but its length has not been determined. Theseore-shoots are known to overlap 25 feet at least, and probably much instance of irregularity was noticed in the Mahoney Mine 30 feet 5—MB 66 CALIFOENIA STATE MINmG BUREAU. above the 900-foot level, where is found what appears to be a displace-ment of a banded vein 15 feet in width, which, together with the inclosedslates, is contorted and cut off abruptly, the sheared end abutting againsta solid vein of quartz 20 feet in thickness. (See Fig. 18.) The contin-uation of this faulted vein has not, as yet, been found above. The slatymaterial found underneath the banded vein is also gold-bearing in pay-ing quantities. A stope on the 900-foot level of the Mahoney followsa well-defined, persistent wall for a long distance. This stope is 25 feetin width. A fissure crosses the ore-shoot at an angle of 65 degrees, dip-ping south. Beyond this was found the above described ~AULT on 900 ft of -Vrje. Ma-HONEY A\hn E:,Sutter CreelC Fig. 18. On the 1000-foot level of this mine, a stope follows what appears to bethe wall above described, with large ore deposits on either side of thewall. The wall takes a slight flexure to tlie west, and the ore followsthe wall on the foot side, while that previously followed on the hanging-wall side bears more to the east, and a slate horse separates them. Inthe main level, the drift continues south, and a new ore-shoot comes infrom the east or hanging wall. A diamond-drill hole run west, herepasses through 6 feet of slate and cuts 3 feet of quartz, which is suc-ceeded by 22 feet of slate and 6 feet of ore. This probably representsthe two branches of the divided vein. The diamond-drill hole continuesfor a distance of 204 feet, where it cuts a vein of good ore 13 feet THE MOTHER LODE REGION—AMADOR COUNTY. 67 thick. This may be the downward extension of the ore dipping west-erl
Size: 1782px × 1402px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
