MINEBK00838

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

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~ Jetiereon-Calhoun - 3. _ :....- , .. _. ,
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TOPO GR4PRY- Contin• i
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~4 ~ii~ and entirely destitute oY timber or water supply. The altitude's
4 !i;' - at whioh the mines are laoated is about 9.,000'. 4 good dragon j
5 !~ road'hae been built Prom thb mine to Central Clty, Colorado, ~'
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a dietanoe of two miles. !
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l~ G E O L O Gr %.
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'i, "A'geod geologioul s$zwe;,~ has been made oY the dfetriot. I,
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~! ! The eharaoter oY oountry rook is grnnit~ and tho geologioal'
~~ ~ „j period is 4rohean.
'! p' 0 RE S & ORE B 0-D I,E S-.L~
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f ~i, Ths ohara:oter oY ore bodies 1e Yineure=veins. There are
~ ~{jj 'about bight known define but ee all work oarried on at the
it
~~~ ~II! .time is.oonfined to tho Calhann shaft the Poll'owing deeorip-
i~ tiori fie oontfned to tho Cnihoiul vela.
!!~ i illy 'Thn strike fie uortheaet and southwest ~snd dips to ihn
f~ ~ 'jl south Por'600'end tHen dips to the north. The ~enoloeing rooks
are granite and sohiet and the gangue fie tnlo. The vein varies
itt width Yrom 1~ to b', with an average width oY 4~. Length,
-----; h61 ht '1 100', Thers are dour oro ehoots~varying in
length Yrom 60' to 3od~ reapeotivsly. Thers are no faults in
the vein.
w The oharnoter oP vein P1111ng Ye~, iron sulphides ~nnd quart
!!jl and the rpetale aro gold, silver, copper, lesd,~;.6no and nraniuu
ili! with gold predominating. Only a small peroentage'oP uranium is
i'ri Pound. About lA0'tone oP ore is prodnoed monthly with nn aver-
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age value par ton oP ,~18. Only about ten per oent. oP the .vein
filling io smelting ore, the balanoe oP'the o~e~being oP ei Pree
'~ milling nature. 411 pre fie treated at the publio vrorke.
.. S U R F,A-O E ,, P';L 4 II.;T .~
`'The eurieoe'`plant'ooneiete oP~a'60 ri.p. boiler on the
enet'nheit ~rid''two;'100.h.p. boilere'on~ths Jefferson abaft;
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