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History:
The history of the property
shows that in the past itinerant miners worked small gold
placers. Rusted machinery and small scale
beneficiation plants as well as piles of magnetite slag
attest to past hard rock mining operations, however, there
are limited records available. Hecla, a Mexican
subsidiary of Hecla of Coeur d'Alene, Idaho, in the late
1990s carried out an exploration program in some areas of
the Property consisting of geochemical stream sampling and
RC drillings of 1,610m in 25 drillholes. The average
gold content of all the 805 samples of the drillholes (2m
intervals) was 306 ppb with the best 2m value at3,388 ppb
Au. All but 37 samples contained measurable gold
with 152 samples at more than 500 ppb Au.
The Hecla drillhole data
exhibits a very low % Cu: Au ppm ratio of 0:02 almost
identical to, and characteristic of, the Porphyry Gold
Deposits of the Maricunga Belt in Chile (Munten and Einaudi,
2000).
View Hecla RC Drill
results
Geology:
The regional geological
setting of the Property is on the western edge of the Sierra
Madre Occidental ("SMO"), an extensive volcanic mountain
terrane composed of Cenozoic Age volcanic rocks formed
between the Cretaceous and Miocene, when the Farallon plate
was consumed below the western margin of Mexico, and a
transform margin was established along the Sea of Cortez.
The SMO is one of the most richly endowed epithermal
precious metal (Ag and Au) regions in Mexico. The
property geology is underlain by older andesitic
trachyandesites, and younger rhyolitic volcanic tuff with
interbedded clastic sediments of probable Tertiary Age.
Multiple intrusions of granodiorite, diorite and monzonite
that in turn are intruded by dykes of feldspar porphyry,
magnetic andesite and syenite occur in the central part of
the Property.
The most important
metallogenic environments on the Property is Au (Cu)
calc-alkaline porphyry system (Porphyry Gold Copper
deposits) of probable Eocene Age. Related epithermal
veins extend from the porphyry system into the overlying
volcanics.
Characteristics of
Mineralized Zones on the Cimarrón Property
|
Mineralized Zone |
Length |
Grades |
Width |
|
El
Prado |
>400 m |
19.2 g Au/t; 322 g Ag/t |
grab |
|
El
Bolante |
>300 m |
6.4 g Au/t; 56 g Ag/t |
1.0 m (average of 7 samples) |
|
Don
Juan |
>20
m |
3.1 g Au/t; 52 g Ag/t |
1.0
m |
|
Dos
Monumentos |
>50
m |
4.7 g Au/t; 6 g Ag/t |
1.7
m |
|
Los
Ebanos |
>70
m |
3.1 g Au/t; 52 g Ag/t |
1.0 m (average of 15 samples) |
|
Huanacaxtle |
>400 m |
52 g Au/t; 28 g Ag/t |
1.4
m |
|
Calerita |
>800 m |
1.3 g Au/t; 9 g Ag/t |
(average of 5 grab samples) |
|
Veteranos |
100
to 200 m |
11.4 g Au/t; 24 g Ag/t |
3.0
m |
|