MINEBK00838

• County: Gilpin
• Volume: 15
• Document: Inspectr
• Suffix: B

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Castle Rook - 3.
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G E 0 B 0 G Y ..
--=~= ~ 6 good''geolo~ioel' survey has-bees'made'-oY'~the distriot.
Th`e''rohsraoter'of~oountry rook~ie~granite end 'gneias'and•the•;
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`geolbgioel period ie Arohean.. .' "'"
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ORE 3 &__ ,ORE B O D I, E 8, -~.,.
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- The`oharaoter'-of ore bodies Ss true-fissure-weine:
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There ere two reins'--but.'e1T' work tiesbeen oonfined- to the! ! '~
Oastie Rooksein.`-Thastrike ie north'eaet.'and eoathwest,and~''
the dip is .to`the'south: The enolosiag looks are granite'and
gneiss and the gangue Ss talo: There are' no faults in<'t}ie~'="
vein. There are two ore ehaots: one is 12b' in length and•the
other 200' in length'. The vein varies in width from 1" to b',
with sa average width of 3'. yength,-468'; height, 41b'.
The vein filling is iron sulphides, quartz and talo:
About l0~ of the vein filling le smelting ore'en$'-the balanoe
of the vain filling is free-milling ore and all ore~ie'treate
at the publio worker The sderage-monthly produotiori'of ore''le
l00 tone with an'average•dalue per'ton>of~$16.'The'piinoipal
metal ie gold"bat ore.nleo oontalne'eiiver; oopper;•Yesd and
zino: 9o•seeays or analyses oR~the ore'oould be obtained'.""'
8 U R F 6 0 E P b d R T.
- ~`-The eurfaoe plant•~ooneists~of a 80 h:p. Returnaubular
boiler, made by-the Erie Iron V7orke of Pennsylvania; one Rsnd•
.:•Imperial, Doubsb-oompound, Air oompreeeor~= 376~oubio'J~eet'of
.air-per minute; Double-aylinder,~7" is 10"', 81st-fribtion,'
'steam hoist.'• ... ...... ..t ': .. . ~,.o, ,_ .. ,r.~;
• The water•ueed in the boiler'ie taken 'from the mine;'-
- .'•' soft ooal ie•used 'for fuel qnd the }~reeeure serried ie ~70$'.'
The boiler•wae last inspeoted 1n~8eptember;^1913:'"•'~ '~ '~
-The hoist degequipped with a positdve 1nd'loabor'in'plai
view, of the engineer Who operates at the shaft. The engineer
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