GENERAL41483

• Permit No: M1995097
• IBM Index Class Name: General Documents
• Doc Name: BIBLIOGRAPHY WITH INTRODUCTION GLOSSARY OF TERMS AND LIST OF MINERALS
• Media Type: D
• Archive: No

SPURR MONOGRAPH
zinc. At the intersection with the Clark fault, the ore
is a breccia which contains angular fragments of
polybasite and barite, with secondary wire silver in
interstices. Spurr's interpretation of the sequence in
the Mollie Gibson: (1) formation of the Silver fault,
which separates Weber [Belden] shales from Leadville
dolomite; (2) development of the Della fault system,
displacing the Silver fault and adjacent formations to
the west on the lower north side; (3) ore deposition,
mainly along the intersection of the Silver fault with
later Della system faults; (4) movement nearly parallel
to the Silver fault, usually more vertical, cutting off
the Della faults and the ore deposits (Clark fault].
Comparison of Mollie Gibson and Smu4aler Mines, pp. 185-
187. The Smuggler mine is similar to the Mollie Gibson
in many respects. The Silver fault [breccia I 6 II] is
the primary ore zone, separating shales [Belden] on the
west side from dolomite (Red Cliff] to the east, the
blue lime [Castle Butte Limestone) being entirely absent
in the Smuggler. In the upper levels the dolomite is
"brown lime," yellowish brown and very closely jointed,
or "short," and the shale is soft; in lower levels (8th
and 9th), below the oxidized zone, the dolomite is hard,
dark, and frosty blue, while the "shales" are actually
hard, black, argillaceous limestone. A 15- to 20-ft.
thick sheet of porphyry [Aspen mountain sill] is found
in several places in the shale. Faulting is similar to
that found in the Mollie Gibson except further up-dip,
with the Della, Emma, Smuggler and Clark systems well
exposed. Rich polybasite ore is found in a single shoot
in the 7th and 8th levels south, with broken ore
followed from it along the Clark fault becoming
increasingly poorer with distance from the solid
orebody, which [according to Spurr) is further evidence
that the Smuggler and Mollie orebodies were originally
one. The majority of the other ores are high in barite,
with varying lead and silver. There is also much low-
grade ore consisting of altered dolomite carrying lead;
where unoxidized this ore could be profitably mined with
silver as low as 8 ounces/ton.
Nature of ore in Smuuuler, p. 187. The main occurrences
of ore are related to the Smuggler fault; deposits at
the south end of the mine, in the 7th and 8th level, are
discussed above. At the north end of the mine, where
the Smuggler and Silver faults intersect, "immense"
stopes from which much high-grade ore had been removed
were found from this point on the Clark tunnel level
continuously down to the plane of the Della fault. in
between, the Smuggler fault carries significant
discontinuous ore, with especially large bodies of
Bruce A. Collins - 9 - BieLioGRAPHY