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Metalline Intersects 95 Meters Averaging 166 Grams Per Tonne Silver in New Zone at... --
Metalline Intersects 95 Meters Averaging 166 Grams Per Tonne Silver in New
Zone at Sierra Mojada

COEUR D'ALENE, Idaho, Nov. 21 /PRNewswire-FirstCall/ -- Metalline Mining
Company (Amex: MMG) announced the status of its current drilling at the Sierra
Mojada Project, Coahuila, Mexico.
During the first part of 2007, from January through mid-April, Metalline
conducted a program of diamond drilling in the western part of the San
Salvador mine with the principal objective of evaluating relatively shallow
silver mineralization in that area. A parallel program of longhole drilling
was conducted from old workings elsewhere on our concessions where preliminary
sampling had indicated silver mineralization. Longhole sampling uses
percussion drills mounted on hydraulic supports ("jacklegs") to obtain samples
at distances of 10 to 20m outward from old mine workings. Total core drilling
during this period was 2074 meters and longhole drilling added 2981m of
samples.
A large number of longhole samples returned encouraging silver values and
several exploration targets were defined for future drill testing. Some of
these targets have been drilled, but as discussed below, we have no assay
results from these holes. One of the more interesting holes from drilling into
the area to the west of the San Salvador shaft was drill hole D1061106. This
hole was drilled from a drill base adjacent to the shaft on the 3 level of the
San Salvador mine, approximately located at UTM coordinates 631,466E;
3,017,102N; elevation 1395 meters. The hole was oriented on an azimuth of
300 degrees and on a +25 degree dip. Between 38 and 43 m, the hole crossed a
5 meter zone that averaged 347 gm/tonne silver (11.1 ounce/tonne) and 0.55%
Cu. A 95 m interval between 84 and 179m averaged 166 gm/tonne silver
(5.3 ounce/tonne) and 0.16% copper. Within this zone, the 40 meter interval
from 90 to 130m averaged 229 gm/tonne silver (7.3 oz/tonne) and 0.2% copper.
The zinc and lead content of all of these intercepts is economically
insignificant. The true thickness of the zone is unknown. The mineralized
intercept is within 100 meters of the surface in this area. Analytical results
will be posted on the Metalline web site in the news releases section
(http://www.metalin.com/news_release.html).
This work came to a halt in mid-April when the geotechnical drilling
program began, but after geotechnical drilling was completed in early August,
diamond drilling was resumed from drill bases in the Encantada mine. We are
currently operating two drills on a double shift basis, and have drilled
3194.55 m in the period 9 August through 10 November. Part of that drilling
was for training new operators using our smaller Termite drills. We have
processed and shipped pulps for assay on 2372 core samples and 124 longhole
samples, representing about 2620 meters of samples, during the period since
early October. Unfortunately it is currently taking more than 6 weeks for
shipments from Mexico to reach our commercial laboratory in Vancouver, and
none of the samples that have reached the laboratory have yet advanced to
begin analysis. We do not know how long it will be before we have assay
results from the samples that have been shipped, but we anticipate a flow time
of at least 8-10 weeks from the time we ship samples until we receive results.
Indications are that the normal winter season reduction in mining exploration
activity in Mexico is not occurring this year and that the pace of external
activity may even be accelerating.
We had anticipated many of these developments and implemented a plan in
early 2007 to deal with the difficulties. During the pause in normal drilling
activities for geotechnical drilling, a major upgrade of our sample
preparation laboratory was performed. This improved both equipment and
facilities as recommended by our consultants. This project was largely
completed by late August.
We placed orders for two addition drills, an additional Onram 1000 in
March and an improved Termite in April. The Onram arrived at the Mexican
border in late October but had been damaged in transit by the shipping company
and was returned to the manufacturer for inspection and repair. The improved
Termite is at the border awaiting import. We have trained crews to operate for
all four drills (two Onram 1000 and two Termites) on a double shift basis.
Suppliers of drill rod, drill bits, and drilling supplies are failing to meet
their delivery commitments, with slides in delivery dates on the order of many
months, but we have adequate supplies on hand to put all of our drills in
operation.
When logging core at Sierra Mojada it is not possible to visually
estimate the grade of silver mineralization. Silver assays are vital to using
the results of previous drilling to direct new holes. A delay of 8-10 weeks
is unacceptably long for this purpose. We recognized this limitation early in
the year and began construction of an on-site chemistry laboratory capable of
giving us assays to screen our samples and provide timely feedback to
operations. We have just completed installation of a Varian model 240-FS
atomic adsorption spectrophotometer (AA unit) and are completing fume hood and
sample digestion facilities in the laboratory. The technicians have completed
training on the AA unit and will be perfecting laboratory procedures using our
standard sample suite. We expect to have the analytical laboratory in
production by the first of the year.
Drilling continues with two objectives. The primary objective is to
resolve issues raised by our engineers and consultants in completion of the
feasibility study on the oxide zinc mineralization. This includes providing
"piercing points" that better define the top of the mineralized zone,
increasing confidence in some areas where more data points are required, and
refining knowledge of the geology and orebody continuity adjacent to major
faults. The second objective is to provide additional data on silver
mineralization so that a resource model can be constructed for silver.
About the Company
Metalline Mining Company is an exploration stage enterprise engaged in the
business of mining. The Company currently owns mining concessions in the
municipality of Sierra Mojada, Coahuila, Mexico. The Company conducts its
operations in Mexico through its wholly owned Mexican subsidiaries, Minera
Metalin S.A. de C.V. and Contratistas de Sierra Mojada S.A. de C.V. To obtain
more information on Metalline Mining Company, visit the Company's web site
(http://www.metalin.com).
Forward-Looking Statements
This news release contains forward-looking statements regarding future
events and Metalline's future results that are subject to the safe harbors
created under the Securities Act of 1933 (the "Securities Act") and the
Securities Exchange Act of 1934 (the "Exchange Act"). These statements are
based on current expectations, estimates, forecasts, and projections about the
industry in which Metalline operates and the beliefs and assumptions of
Metalline's management. Words such as "expects," "anticipates," "targets,"
"goals," "projects," "intends," "plans," "believes," "seeks," "estimates,"
"continues," "may," variations of such words, and similar expressions, are
intended to identify such forward-looking statements. In addition, any
statements that refer to projections of Metalline's future financial
performance, Metalline's anticipated growth and potentials in its business and
other characterizations of future events or circumstances are forward-looking
statements. Readers are cautioned that these forward-looking statements are
only predictions and are subject to risks, uncertainties, and assumptions that
are difficult to predict, including those identified elsewhere herein and
Metalline's Annual Report on Form 10-KSB for the fiscal year ended October 31,
2006 under "Risk Factors." Therefore, actual results may differ materially
and adversely from those expressed in any forward-looking statements.
Metalline undertakes no obligation to revise or update any forward-looking
statements for any reason.
SOURCE Metalline Mining Company

Metalline Mining Company, [phone], fax, [phone],
[e-mail]

Symbols:
DE;LZ6 US;MMG
21-Nov-2007 14:00:00 GMT
Source PRN - PR Newswire
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