The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1906-02-26


|. logical conditions OF the Bullfrog mining
! district This demand seems iair to be
realized in q series OF articles that nave
been prepared by II, Fl. Taft, the advance
sheets Of which have received considerable
attention from the Engineering and Min
Ing Journal. The following Is an excerpt
from that publication;
Geological Conditions Of Amargosa.
AT the head OF the Amargosa desert
the Grapevine range, 600 feet above tho
valley east and 200 feet above Dcnth val
ley west is lankcd cast by recent vol
carlo tufts. Along the summit occur lime
stones and quartzites dipping cast. and
me-coIglomornts, clrryinB granite, do
rte and quartz, such as occur many mics
north. The AmarSosa Targc, lying be-
tween the south end OF the Ralston desert
and the northwest ond of the AmarSosa!
is formed by series Of tu1s superimposed
upon limestone. The various members or
the volcanic series occur with the reSu-
larity OF scdimentary strata, and the up
rer ones are highly colored, They dip
from 10 deg. to ~ deg. northeast. An eN-
tcnsive block-faulung has exposed the
edges OF the various flows. particularly
from the west. tho escapencnt being on
that side About two miles west OF the
Pulfrog mine Is a small hill OF gneisS,
overlatd by strata Of chlorltic states
quartzit5s, limcstoncs and tufrS, dipping
fiat TO the east.
Struggle Between Towns.
"On August 10, 1904 two claiI,s were To-
Gated as Bullfrog No. ] and No. 2 From
August 10 10 September H. 1901, large
number OF claims were located IN what
arc now known as Badd and Bonanza
mountaipS. about three or four miles
southeast The RullfroG Mining company
was formed 10 take up group of Ladd
mountain claims. and later the first dis
COVery of the district was transferred 10
new corporation, the Original l3ullfrog
Mining syndicate. mile south of the
were stalCed on. surveyed ard sold as lots
Under the name OF 'Bullfrogtown.' AnaT-
gosa. mile farther south, aspired To be
The metropolis out on the desert west Of
Lddd mountain tho same thing was done
and the town was named Bonanza. -Four
miles from tho latter place I'm the Oasi-
valley. on tn bank OF a stream Of running
winter, the town OF Beatty. named for n
rdnchman living a mile above was laid
out and soon became the most populous
place. Three miles below Beatty group
or tents bore the name of Gold Center
In March. 1905. in a cove made by the deA-
ert in the Am1rgosa mountain between
Fonanza and Ledd mountains, Rhyoiite
was laid out, and Bullfrog and Bonanza
moved 10 It. This place Is five miles from
water.
Immense outcrop of Bullfrog.
About ten miles southwest or whore
Oasis valley breaks through the Amar-
gcsa range. tho cliffs are OF limestone
which pitches west and Is soon buried be-
meath the soil and the volcanic tuffs that
have probably borne 1t down lu several
places the contact Is exposed aud there
conpanied by sillcc1us deposition, eX-
cCpt I'm and near the Bulfrog claims Be-
tween Ladd mountain and the OnSis creek
there is a place where there has been n
considerable spring OIL the contact.
Bouldcrs OF granite three inches IN dame
ter are scattered over an area 100 feet
square There Is no silclacation and no
mineral. The BullfroG claims cover an
immense outcrop that can be seen for
miles, and are only three miles from n
spring lhat has been frsquented by pros
"a Fg
white quartz Hes like crescent around a
small dome-shapcd hill. following tho con-
tact which dips 30 deg north 90 deg. west
INTO the hill This quartz has II maximum
thickness Of nearly leo feet. and Is gen
orally massive, though sometimes there
are large slightly amethystine-tinted
cracking has occurred and flow of water
dCpositIng copper sulphioes and the pre-
cioUs metals. Wherever green stain
occurs visible gold can usually be found
Nearly Vertical Fissuring.
oro The o2,i2t7 other EToPeTtles OF This district
what those Of Goldneld. There ms been
a nearly vertical flssurinG followed by n
aow Of water heavily charged with silica.
hding ths assures ard soaking into tho
country rock, One can find all SruGutions
from pure quartz to slightly s,licillsd
,Sini,,y cSSunt,Ty rock rock These Tce are the so-calicd
ihEoHte dlkeS The country rock i1sfIf
had slight GENERALIZATION, which tbis
siltcircation did not Increase 4 secondary.
ana muCh less extensive cracking and in
flow of alllceous waters occurred yybjCb
deposited the gold The veins are nearly
Fertical. strike north 10 deg TO 90 de-
east, are sometimes thin seams, sometimes
several feet IN thickness. and again 1yido
zones OF stockworl< The better formed
Ire calcareous and slightly stained with
manganese There ere rTony 80 So,
veins anh Ihey were easily found. but ro
dEcoyer orc shoots in them is quite a dir
lerent matter. The amount OF work doW,
IN both this district and GoldaeId d,,ri,,,
the past winter has been remarkabjy
small "iS
Interesting to Prospectors.
An interesting ana. TO the prospector
erlhg or these veins The older tuh,s arc
uineralZcd and the more recent GIpncrI
Nre not the older are basic while In ~ !
upper there Is a flow of rhyolite Al Ton.
ian II Is quite noticeable that the rhyoiit,
is more recsnt than the 'Inineral{zed nor
Fhyry The regularity of the erlIntions |
and aI the exposure OF the edges OF the often |
IEnly colcrcd strata make this an ideal |
nj.