Cap that kind of talk, NEWS:( RE NEWS):
NEWS RELEASE 99-4
June 11, 1999
JABA ANNOUNCES INTENTION TO COMMENCE DRILLING BY KENNECOTT EXPLORATION
COMPANY ON TUESDAY JUNE 15, 1999 ON ITS EAST SILVER BELL PORPHYRY COPPER
PROJECT, ARIZONA
JABA Inc. is pleased to announce that the drilling to be undertaken by
Kennecott Exploration Company as part of its Joint Venture obligation on
JABA's East Silver Bell project in the Silver Bell Mining District in
Pima County, southeastern Arizona is expected to commence on Tuesday
June 15, 1999. The Silver Bell District has a past production of 81.8
million metric tons at a grade of 0.73% copper. The district has been
continuously mined by ASARCO for more than 45 years. The East Silver
Bell property adjoins the ASARCO property and overlies the east
extension of the Silver Bell District.
The technical description of the exploration target in our last news
release was confusing to our non-technical shareholders. As noted in
that release of April 29, 1999, and as a clarification of the technical
terms used in that release, in JABA's opinion, as well as those of the
other consulting geologists involved, the leached capping and
alteration encountered in the last drilling program by venture partner
Valerie Gold indicates that a copper enrichment zone or "chalcocite
blanket" , (chalcocite - a copper mineral consisting of two atoms of
copper and one of sulfur (Cu2S) - 80% copper and 20% sulfur by weight)
has a good chance of occurring below the oxidized leached capping which
has not yet been fully penetrated. This chalcocite blanket enrichment
is what formed the ore bodies in the ASARCO part of the Silver Bell
mining district and most other porphyry copper deposits throughout the
world. In the original open pit ore at Silver Bell the grade was in the
+1% range though material now being mined is about 0.37% copper (about
3.7 kg/ metric ton or 7.4 lbs per short ton). Leached capping in
porphyry copper deposits develops from the oxidizing effects of the
atmosphere and bacterial action dissolving the copper and leaching it
out of the surface to be precipitated immediately below the water table
as a tabular chalcocite enriched zone or "blanket". To those
knowledgeable in the art (in this case the JABA geologists and its
consultants and the Kennecott geologists) the previous presence of
copper in the leached capping leaves telltale indicators suggesting a
chalcocite blanket may be present below oxidized (leached capping)
rocks. This is the target at the JABA East Silver Bell property.
The Kennecott/JABA joint venture will further explore the porphyry
copper indicators at the East Silver Bell project by drilling. Since
the April 29, 1999 news release, further consideration suggests that
rather than re-entering one of the existing drill holes with a diamond
drill, a new hole will be drilled using reverse circulation methods.
This will result in lower costs and more rapid penetration. A single
hole will be drilled to the lesser of 2,000 feet or the shallowest depth
at which a majority of the rocks are unoxidized plus an additional 200
feet. If the results of this hole are encouraging to Kennecott, it
has the right but not the obligation to continue the drilling program.
On another matter, the JABA web site and email communication was down
from Friday May 28 to Thursday June 3, 1999. This outage resulted when
our local service provider where our web site resided, without notice to
any of its clients, removed its computers and vacated its premises over
the U.S. Memorial Day weekend, ceasing business. This was discovered
Tuesday morning, June 2, by JABA who physically went to the site, as no
telephones were being answered. It took the remainder of the time to
get set up with Sprint subsidiary EarthLink.com. We apologize for any
inconvenience this may have caused. We believe we will have
uninterrupted service in the future.
JABA continues to actively seek Joint Venture partners for its other
properties in the Southwestern United States and Northern Mexico.
On behalf of the Board of Directors,
James A. Briscoe, Chief Executive Officer
The Alberta Stock Exchange has neither approved or disapproved the
information contained herein.
ADDED by Chucka:
sentex.net
Highlights:
1-Autoclave system
oxidation process in which high temperatures and pressure are applied to convert refractory sulphide mineralization into amenable oxide ore.
2-Collectors, 'Buttons'
- metals whose physical properties make precious metals soluble and collect into a solid button when smelted. Lead, mercury, copper and nickle are collecters commonly used in metallurgical techniques
3-Disseminated ore:
ore carrying small particals of valuable minerals, spread more or less uniformly through the gangue matter; distinct massive ore, wherein the valuable minerals occur in almost solid form with very little waste mineral included
4-8=DRILLING
Auger
- Auger drillinng uses a screw type bit to bring material to the surface along the outside of the drill itself.
Diamond:
drilling with a hollow bit with a diamond cutting rim to produce a cylindrical core that is used for geological detail and to help establish reserve estimates.
Infill:
diamond drilling at shorter intervals between existing holes, used to provide greater geological detail and to aid in establishing reserve estimates.
Reverse circulation:
drilling that produces rock chips rather than a core. This is faster and cheaper than diamond drilling, the chips are forced by air to the surface for analysis.
JABA Key Part:
<<.., (chalcocite - a copper mineral consisting of two atoms of
copper and one of sulfur (Cu2S) - 80% copper and 20% sulfur by weight)
has a good chance of occurring below the oxidized leached capping which
has not yet been fully penetrated. This chalcocite blanket enrichment
is what formed the ore bodies in the ASARCO part of the Silver Bell
mining district and most other porphyry copper deposits ..>> |
