Aurado receives drill results from Mexican properties
Aurado Exploration Ltd
AEO
Shares issued 41,308,610
1999-01-14 close $0.065
Friday Jan 15 1999
Mr. William Dickie reports
Cominco Mexico, S.A. de C.V, a wholly-owned subsidiary of Cominco Limited, has completed seven
diamond drill holes totalling 1,927 metres on the Amapola, Venaditas and Piedrotas properties. These
are three of the eight properties in the joint venture. The drill program was designed to investigate
various targets defined by geophysical and geological programs.
AMAPOLA
The four holes on Amapola were mainly to test geophysical anomalies developed over a five kilometre
by three kilometre area in the northern part of the claim. It was considered that volcanic stratigraphy
favourable for volcanogenic massive sulphide type mineralization was present at shallow depths.
These four holes yielded geologically surprising results; the first being that the stratigraphic section
intersected was almost entirely in sedimentary rocks. No volcanic rocks similar to those outcropping a
few kilometres to the north were seen. Sufficient pyrite and/or pyrrhotite (4 per cent to 6 per cent) were
observed in the four holes to explain the induced polarization and magnetic anomalies.
The second surprise was to locate the presence of brecciation, alteration and anomalous lead, zinc,
silver, arsenic, tin values in the two eastern holes (AM 02, AM 03). The breccias are best developed in
AM 02 between 30 and 230 metres and in hole AM 03 between 60 and 270 metres.
Anomalous Pb, Zn, Ag values were best developed in AM 02 between 95 metres and 285 metres. The
best eight intervals, between one and six metres in length, are given in the following table. Highest
values were 2.3 per cent Pb, 1.9 per cent Zn and 122 parts per million Ag. Mineralization is associated
with galena and sphalerite in stockwork type veins and breccias. Hole AM 03 contained high As (3,100
ppm) and high Sb (233 ppm) associated with silicification between 243 and 274 metres.
It would appear from the evidence in holes AM 02 and AM 03 that these holes are in the vicinity of a
heat source. This area is characterized by higher resistivity and lower residual gravity values and should
be tested for Ag, Pb, Zn mineralization.
Pb Zn Ag Intersections in AM-02
Thick-
Interval ness Pb Zn Ag
m m ppm ppm ppm
95.9 - 98.1 2.20 6,777 9,974 32
128.2 -129.5 1.30 22,760 19,320 122
134.7 -135.7 1.00 11,290 8,149 40
136.3 -137.4 1.10 26,630 325 92
148.0 -150.3 2.3 12,918 4,219 68
167.9 -169.4 1.5 6,918 7,374 35
240.0 -243.0 3.0 12,635 899 37
279.0 -285.0 6.0 6,576 215 12
Analyses in Cominco Lab by ICP
with hot Aqua Regia digestion.
VENADITAS
Two holes were situated on Venaditas to test gradient array and dipole-dipole IP anomalies with
chargeability similar to that obtained over the San Nicholas discovery. The area is underlain by
sediments and volcanics containing altered rhyolite porphyry. This environment is considered favourable
for VMS style mineralization. Hole VE 01 was also situated over a combined magnetic and gravity
anomaly.
No significant anomalous values were obtained in either hole. The gravity anomaly remains unexplained
but enough pyrite was found to explain the IP anomaly. Hole VE 01 was entirely in sediments but
VE-02 intersected in its upper part 140 metres of rhyolite, intermediate to mafic volcanics and
microdiorite.
It appears that a downfaulted block of volcanic stratigraphy is preserved on the southern part of the
Venaditas property. Consideration may be given to further drill testing of the E-W belt of anomalous
gradient array IP that straddles the volcanics.
PIEDROTAS
One hole was drilled on the property to test a dipole-dipole IP anomaly at 150 metres depth. The area
showed mafic and felsic volcanic outcrops on surface. Unfortunately, this turned out to be no more than
a "skim" of volcanics and the hole intersected a sedimentary section with 3 per cent to 6 per cent pyrite,
enough to explain the IP anomaly.
RECOMMENDED WORK ON GARABATO
Reconnaissance gravity and airborne magnetics on the eastern part of the garabato claim (one of the other
five claim groups in the joint venture) an area with coincident gravity high and a magnetic anomaly.
Follow-up gravity, magnetics and IP should be done.
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