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Saturday, 12/31/2011 9:45:36 AM

Saturday, December 31, 2011 9:45:36 AM

Post# of 118202
Some DD for the new year:

I found this, multiple references made to "Roberts Reports", also note that some of the text gets distorted when copying/pasting because of the typed wording:

http://esr.lib.ttu.edu/bitstream/handle/2346/20232/31295002591716.pdf?sequence=1

Particular attention to (page numbers are the PDF pages not the reports):

Page 11: Mud Springs Gulch (on the right), this is part of NRG's claims.

Page 12: Gray Eagle Mine = Adjacent to NRG's dig site (southwest)?

Page 33-34:

Gold Deposits
The most important ore deposits are the gold occurrences
in mineral belts that trend northwestward and
northeastward across north-central Nevada. According to Roberts (I966 and 1971)1 the principal northwesterly belts
are the Lynn-Railroad, Battle Mountain-Eureka
. Getchell-
National, and Lovelock-Austin trends. The only northeasterly
mineral belt is the Shoshone-Jarbidge, which cuts
across the northwesterly trends (Figure 10).


Page 35: Battle Mountain - Eureka Trend, passes right thru NRG's claims

Page 36: Bullion District, cleary northwest alligned in the Battle Mountain - Eureka Trend

Page 40: Locations 9, 10 & 11 are literally right on top of NRG's claim area

Page 44:

BuIIion Mining District
The Gray Eagle mine is located in the BuIIion m.ining
district, 23 miles southwest of Peowawe, in the Shoshone
Range (Figure 13). Ores of the BuIIion district, part
of the Battle Mountain-Eureka mineral belt, generally occur
in fissure veins within cherts
and quartzites of the Valmy
Formation and cherts of the Slaven Chert in the upper plate
of the Roberts thrust fault.


Page 45: Bullion District

Page 47:

Between I869 and 1977, total value of ore
produced from the BuIIion district was 16 million dollars.
This amounts to 300,000 ounces of gold, 1 million ounces
of silver
, 1.3 million pounds of copper, 1.3 million pounds
of lead, 500,000 tons of barite. and several million dollars worth of turquoise (Stewart and others. 1977).


Page 50:

The Valmy Formation, a member of the western rock
facies, crops out over large areas of north-central Nevada.
The Valmy Formation, a thick bedded to massive orthoquartzite
with chert and greenstone, occurs in thrust sheets of
the Roberts thrust
,



Page 51 (describes NRGs silty gravels?):

Cherts of the Valmy Formation range from dark gray
to very light gray, but some are red and green. These
cherts are composed of very fine silt-size quartz grains
in a siliceous matrix
, with some containing a little sericite,
carbonaceous matter, and iron oxide. The very minor
argillite and shale in the Valmy Formation occur in small units within the cherts (Moorhouse, 1959; Gilluly and
Gates, 1965» Gilluly and Masursky, I965; and Roberts and
others, I967).



Page 69:

:Cr^CIUSI0NS
In the Gray Eagle mine area the Crdoviciar Valmy
Formation and the Devonian Slaven Chert, representing the
upper plate of the Roberts thrust, are intruded tv the
Granite Mountain stock. The Granite Mountain i^.trusive,
an equigranular granodiorite stock approximately 37 million
years old, is one of the largest plutons in the region.
There is no strong evidence of either forceful intrusion
or of the origin of the magma itself.
A thrust fault, part of the Roberts thrust system,
brings the Valmy Formation and the Slaven Chert into contact
in the western section of the mapped area. The Corral
Canyon Easin and Range fault, with a throw of at least
100 feet, brings the Valmy Formation into contact with the
west side of the Granite Mountain stock. The Granite
Mountain fault, v/hich splits the stock, may be related
to both the cooling of the intrusive and Basin and Range
orogeny. Mineralization in the Gray Eagle mine area takes two
forms. The strongest mineralization apparantly occurs
along quartz veins in the Granite Mountain stock, which
is also cut by lamprophyric dikes. rv'any of the lamprophyre
dikes have quartz veins with associated sulfide
metallization. AII metals associated with the intrusion
are probably the same age as the stock. Turquoise mineral-
ization is extersive in the Slaven Chert v/est of the t^rus^.
fault, and several large prospect pits exist ir this area;
however, production has been minimal. The only productive workings in the area were from the Gray Eagle vein. During the period, I906 to 1950,
4210 tons of crude ore produced 233,613 ounces of silver,
2,224 ounces of gold.
43,368 pounds of copper, 368,139
pounds of lead, and 2,092 pounds of zinc. Other veirs
have been heavily prospected; however, the only evidence
of penetration into the sulfide zone was at the shaft ir
the north vein and at the collapsed adit and shaft in the
PhiIIipini vein on the east side of Granite ^^ountain (Plate
1). Samples from these workings assayed 12.48 oz/ton to
35.0 oz/ton silver from the north vein and 0.11 oz/ton
to 0.14 oz/ton gold and I.43 oz/ton to 16.35 oz/ton silver
from the PhiIIipini vein. AII the veins possess a
gossan and, therefore, probably contain a supergene sulfide
enrichment zone at depth. No evidence exists that
any of the veins have been drilled
.



Page 77 (map): From what I can tell, NRG is just to the northeast of the Gray Eagle Mine at the base of Granite Mountain and this area is the "head" of Mud Springs Gulch.

Cool stuff, have fun.

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