Capstone Reports Production Results for the First Nine Months of 2010

By Capstone Mining Corp., PRNE
Monday, October 4, 2010

Year-to-Date Production of 58.0 Million Pounds of Copper in Concentrates

VANCOUVER, October 5, 2010 - Capstone Mining Corp. (CS: TSX) today announced its operating results
for the three and nine months ended September 30, 2010 from its two
operations, the Cozamin and Minto mines. Combined production totalled 19.2
million and 58.0 million pounds of copper in concentrates in the third
quarter and first nine months, respectively, with additional significant by-
products of lead, zinc, silver and gold. At September 30, 2010 Capstone had
a cash balance of US$170 million (including restricted cash of US$11
million
and a short-term deposit balance of US$20 million), a significant
increase primarily attributable to the cash generated from sales at higher
metal prices as well as the sale of some investments. Full financial
results will be reported on November 9, 2010, as discussed below.

As previously disclosed, operational performance has improved at both
the Cozamin and Minto mines during the course of the third quarter of 2010.
Mining rates at Cozamin continued to improve through September, with higher
copper grades reporting to the mill as well. Minto's tailings filter plant
performance continues to restrict mill throughput, but to a lesser degree
than experienced previously, as improvements to the tailings filtration
circuit have begun to take effect. Results at both operations are in line
with mid-year revised guidance and full year guidance remains unchanged at
80 to 85 million pounds of copper in concentrates.

    -------------------------------------------------------------------------
                                 Q1 2010     Q2 2010     Q3 2010    YTD 2010
    -------------------------------------------------------------------------
    Copper in concentrates
     (millions of pounds)
    -------------------------------------------------------------------------
      - Cozamin                      9.9         7.8         9.6        27.3
    -------------------------------------------------------------------------
      - Minto                       12.0        10.1         9.6      30.7(x)
    -------------------------------------------------------------------------
    Total                           21.9        17.9        19.2        58.0
    -------------------------------------------------------------------------
    (x) Minto realized negative adjustments to previously reported copper
        production based on the final settlement of copper sales during the
        first six months in the amount of one million pounds. As these
        amounts are related to shipments made over the first six months, but
        relate to production in the latter part of 2009 and early 2010, the
        adjustments are only reflected in the year to date column, therefore
        certain lines will not sum across.

These operating results have been provided earlier than normal in
order to accommodate an investor and analyst tour of Capstone's mines
taking place October 4-8, 2010 and, as a result, do not contain operating
cost information, which will be included in Capstone's financial reporting
for the third quarter, 2010.

Operational Highlights for the three and nine months ended September
30, 2010

The following is a summary of operational highlights for Capstone
during the three and nine months, respectively, ended September 30, 2010:

     -   Production of 19.2 million and 58.0 million pounds of copper
         contained in concentrates, respectively.
     -   By-product production of 6.0 million and 13.7 million pounds of
         zinc, 1.8 million and 7.6 million pounds of lead and 427,289 and
         1,225,357 ounces of silver in concentrates, for the three and nine
         months, respectively. Final gold production is not available since
         assaying is done off site, but is estimated at 4,788 and 18,156
         ounces for the respective periods.
     -   Detailed operating statistics for both operating mines are provided
         in the tables below.

Cozamin Highlights and Outlook

Cozamin Mine results for the three and nine months ended September 30,
2010
, respectively, were:

    -------------------------------------------------------------------------
                                                         Q3 2010    YTD 2010
    -------------------------------------------------------------------------
    Production(2)
    (contained in concentrates)
      - Copper (000s pounds)                               9,601      27,343
    -------------------------------------------------------------------------
      - Lead (000s pounds)                                 1,819       7,645
    -------------------------------------------------------------------------
      - Zinc (000s pounds)                                 5,990      13,654
    -------------------------------------------------------------------------
      - Silver (ounces)                                  381,050   1,068,419
    -------------------------------------------------------------------------
    Mine
    -------------------------------------------------------------------------
      - Tonnes of ore mined                              273,247     764,265
    -------------------------------------------------------------------------
    Mill
    -------------------------------------------------------------------------
      - Tonnes processed                                 273,676     766,179
    -------------------------------------------------------------------------
      - Tonnes processed per day                           2,975       2,806
    -------------------------------------------------------------------------
      - Copper grade (%)                                    1.74        1.78
    -------------------------------------------------------------------------
      - Lead grade (%)                                      0.43        0.68
    -------------------------------------------------------------------------
      - Zinc grade (%)                                      1.46        1.31
    -------------------------------------------------------------------------
      - Silver grade (g/t)                                    62          61
    -------------------------------------------------------------------------
    Recoveries
    -------------------------------------------------------------------------
      - Copper (%)                                          91.4        90.9
    -------------------------------------------------------------------------
      - Lead (%)                                            70.0        66.4
    -------------------------------------------------------------------------
      - Zinc (%)                                            68.2        61.9
    -------------------------------------------------------------------------
      - Silver (%)                                          70.1        71.6
    -------------------------------------------------------------------------
    Concentrate(2)
    -------------------------------------------------------------------------
      - Copper (dmt)                                      17,232      50,169
    -------------------------------------------------------------------------
      - Copper (%)                                          25.3        24.7
    -------------------------------------------------------------------------
      - Silver (g/t)                                         569         523
    -------------------------------------------------------------------------
      - Lead (dmt)                                         1,199       5,267
    -------------------------------------------------------------------------
      - Lead (%)                                            68.8        65.8
    -------------------------------------------------------------------------
      - Silver (g/t)                                       1,709       1,250
    -------------------------------------------------------------------------
      - Zinc (dmt)                                         5,551      12,914
    -------------------------------------------------------------------------
      - Zinc (%)                                            49.0        48.0
    -------------------------------------------------------------------------
    (2) Adjustments based on final settlements will be made in future periods
    -   Mined tonnes and milled tonnes were essentially at design levels for
        the full quarter.
    -   However, as previously disclosed, mine production increased around
        mid-August and, since then, mine and mill production tonnage have
        averaged approximately 3,400 tonnes per day, well above the mill
        design capacity of 3,000 tonnes per day.
    -   Average copper grade for the quarter remain lower than indicated in
        prior guidance due to the previously disclosed reduced production
        from the high copper grade, wider Avoca stopes. In September, copper
        grades increased as production in the Avoca zone increased following
        completion of the additional cable bolting recommended by the
        Company's geotechnical consultant.
    -   Copper grades for the fourth quarter are expected to increase and
        lead grades be lower than has been the situation so far in 2010 as a
        result of increased production from the Avoca area and less reliance
        on the upper and hangingwall workings, where zinc, and especially
        lead, grades are higher than is typical for the overall mineral
        reserves.
    -   Full year guidance remains unchanged at Cozamin for 40-42 million lbs
        of copper.

Minto Highlights and Outlook

Minto Mine results for three and nine months ended September 30, 2010,
respectively, were:

    -------------------------------------------------------------------------
                                                         Q3 2010  YTD 2010(4)
    -------------------------------------------------------------------------
    Production(3)
    (contained in concentrates)
      - Copper (000s lbs)                                  9,614      30,675
    -------------------------------------------------------------------------
      - Gold (oz) (2)                                      4,788      18,156
    -------------------------------------------------------------------------
      - Silver (oz)                                       46,239     156,938
    -------------------------------------------------------------------------
    Mining
    -------------------------------------------------------------------------
      - Waste (tonnes)                                 1,874,283   6,108,540
    -------------------------------------------------------------------------
      - Ore (tonnes)                                           0   1,116,722
    -------------------------------------------------------------------------
      - Total material mined (tonnes)                  1,874,283   7,225,262
    -------------------------------------------------------------------------
    Milling
    -------------------------------------------------------------------------
      - Tonnes processed                                 242,295     656,930
    -------------------------------------------------------------------------
      - Tonnes processed per day                           2,633       2,406
    -------------------------------------------------------------------------
      - Copper grade (%)                                    1.94        2.28
    -------------------------------------------------------------------------
      - Gold grade (g/t)(2),(3)                             0.83        0.95
    -------------------------------------------------------------------------
      - Silver grade (g/t)                                   7.1         8.6
    -------------------------------------------------------------------------
    Recoveries
    -------------------------------------------------------------------------
      - Copper (%)                                          92.7        92.7
    -------------------------------------------------------------------------
      - Gold (%)(2),(3),                                    73.7        74.4
    -------------------------------------------------------------------------
      - Silver (%)                                          83.6        81.6
    -------------------------------------------------------------------------
    Concentrate
    -------------------------------------------------------------------------
      - Dry tonnes produced                               11,051      34,456
    -------------------------------------------------------------------------
      - Copper grade (%)                                    39.5        40.4
    -------------------------------------------------------------------------
      - Gold grade (g/t)(2),(3)                             13.3        13.5
    -------------------------------------------------------------------------
      - Silver grade (g/t)                                   130         142
    -------------------------------------------------------------------------
    (2) Gold is not assayed on site, resulting in a significant lag in
        receiving this data. Data for Q3 is an estimate based on prior
        production experience.
    (3) Adjustments based on final settlements will be made in future
        periods.
    (4) Adjustments are only reflected in year to date column relating to
        negative adjustments of previously reported copper production. 

     -   Improvements in the tailings filtration plant resulted in
         significantly improved mill throughput compared with the second
         quarter, following completion of rebuilds of three of the five
         filters, with two more rebuilds to be completed in October.
         Cumulative throughput remains below guidance for the year.
     -   August and September mill throughput averaged over 2,700tpd compared
         with just over 2,000tpd in the second quarter following the
         improvements in tailings filtration noted above.
     -   Throughput is expected to further increase with installation of
         higher performance filter cloths in the tailings filters during
         October and November.
     -   No ore was mined from the pit during the third quarter due to the
         continued presence of water in the Minto Main pit that was either
         collected during freshet or resulted from relatively high rainfall
         in late-July and August and which was not discharged at that time in
         order to ensure compliance with Minto's water use licence. Minto has
         applied for and is working through the regulatory process to amend
         its water licence standards to improve overall water management
         while remaining protective of the environment.
     -   The inability to mine high grade ore from the Stage 4 push-back of
         the Minto Main pit adversely affected the copper grade in the third
         quarter as operations were reliant on previously stockpiled ore with
         no supplementary higher grade ore from the open pit.
     -   The new water treatment facility has been on line and treating and
         discharging water since July 2010. Mining is expected to recommence
         from the Stage 4 push-back in late October following removal of the
         remaining water from the pit.
     -   The delays in dewatering the Minto Main pit were anticipated in the
         mid-year forecast and full year guidance remains unchanged at 40-43
         million lbs of copper.

Forward Sales

Capstone continues to reduce its forward copper sales commitments
through a combination of deliveries of metal produced at its mines and
entering into offsetting forward copper purchase contracts that increase
Capstone's exposure to rising copper prices. During the quarter Capstone
reduced its net forward sales obligations by more than 50% versus the net
positions on June 30, 2010. The market to mark of the Company's hedge book
will be reflected in Capstone's future financial statements. The Company's
net forward copper sales contracts at September 30, 2010 are tabulated below.

    -------------------------------------------------------------------------
                                                                       Price
    Year                                      Tonnes         lbs     (US$/lb)
    -------------------------------------------------------------------------
    Q4-2010                                    2,832   6,243,491        2.10
    -------------------------------------------------------------------------
    2011                                       5,127  11,303,100        2.32
    -------------------------------------------------------------------------
    2012                                       1,200   2,645,547        3.25
    -------------------------------------------------------------------------
    2013                                       1,200   2,645,547        3.24
    -------------------------------------------------------------------------
    2014                                         900   1,984,160        3.18
    -------------------------------------------------------------------------
    Total                                     11,259  24,821,846        2.53
    -------------------------------------------------------------------------

Minto Project Debt Fully Repaid

On October 1, 2010 Capstone repaid the entire C$10 million balance of
its Subordinated Loan Facility. This repayment represents the final payment
on the Minto Project Debt Facility.

Third Quarter Financial Results Timing

Capstone will report its third quarter 2010 financial results on
Tuesday, November 9, 2010 after market close and will host a conference
call and webcast to discuss these results as noted below.

Conference call and webcast details are as follows:

     Date:              Wednesday November 10, 2010
     Time:              8:30 AM PST (11:30 AM EST)
     Dial in:           North America - 1.888.231.8191, International -
                        1.647.427.7450
     Webcast:
www.newswire.ca/en/webcast/viewEvent.cgi?eventID(equal sign)3242580
     Replay:            North America - 1.800.642.1687, International -
                        1.416.849.0833
     Replay Pass code:  14853632

Forward-Looking Information

This document may contain "forward-looking information" within the
meaning of Canadian securities legislation and "forward-looking statements"
within the meaning of the United States Private Securities Litigation
Reform Act of 1995 (collectively, "forward-looking statements"). These
forward-looking statements are made as of the date of this document and
Capstone Mining Corp. (the "Company") does not intend, and does not assume
any obligation, to update these forward-looking statements, except as
required under applicable securities legislation.

Forward-looking statements relate to future events or future
performance and reflect Company management's expectations or beliefs
regarding future events and include, but are not limited to, statements
with respect to the estimation of mineral reserves and resources, the
realization of mineral reserve estimates, the timing and amount of
estimated future production, costs of production, capital expenditures,
success of mining operations, environmental risks, unanticipated
reclamation expenses, title disputes or claims and limitations on insurance
coverage. In certain cases, forward-looking statements can be identified by
the use of words such as "plans", "expects" or "does not expect", "is
expected", "budget", "scheduled", "estimates", "forecasts", "intends",
"anticipates" or "does not anticipate", or "believes", or variations of
such words and phrases or statements that certain actions, events or
results "may", "could", "would", "might" or "will be taken", "occur" or "be
achieved" or the negative of these terms or comparable terminology. By
their very nature forward-looking statements involve known and unknown
risks, uncertainties and other factors which may cause the actual results,
performance or achievements of the Company to be materially different from
any future results, performance or achievements
expressed or implied by the forward-looking statements. Such factors
include, among others, risks related to actual results of current
exploration activities; changes in project parameters as plans continue to
be refined; future prices of resources; possible variations in ore reserves
, grade or recovery rates; accidents, labour disputes and other risks of
the mining industry; delays in obtaining governmental approvals or
financing or in the completion of development or construction activities;
as well as those factors detailed from time to time in the Company's
interim and annual financial statements and management's discussion and
analysis of those statements, all of which are filed and available for
review on SEDAR at www.sedar.com. Although the Company has attempted to
identify important factors that could cause actual actions, events or
results to differ materially from those described in forward-looking
statements, there may be other factors that cause actions, events or
results not to be as anticipated, estimated or intended. There can be no
assurance that forward-looking statements will prove to be accurate, as
actual results and future events could differ materially from those
anticipated in such statements.

Accordingly, readers should not place undue reliance on forward
looking statements.

43-101 Compliance

Unless otherwise indicated, Capstone has prepared the technical
information in this news release ("Technical Information") based on
information contained in the technical reports and news releases (
collectively the "Disclosure Documents") available under Capstone Mining
Corp.'s and Sherwood Copper Corp.'s company profile on SEDAR at www.sedar.
com. Each Disclosure Document was prepared by or under the supervision of a
qualified person (a "Qualified Person") as defined in National Instrument
43-101 - Standards of Disclosure for Mineral Projects of the Canadian
Securities Administrators ("NI 43-101"). Readers are encouraged to review
the full text of the Disclosure Documents which qualifies the Technical
Information. Readers are advised that mineral resources that are not
mineral reserves do not have demonstrated economic viability. The
Disclosure Documents are each intended to be read as a whole, and sections
should not be read or relied upon out of context. The Technical Information
is subject to the assumptions and qualifications contained in the
Disclosure Documents.

The following employees of Capstone, each a Qualified Person, reviewed
Technical Information contained in this news release: Robert Barnes,
Professional Engineer, reviewed Technical Information related to the
Cozamin Mine and Stephen Quin, Professional Geologist reviewed all
Technical Information in this news release. In addition, Gregg Bush, Chief
Operating Officer for Capstone, Jaime Delgado, Acting General Manager,
reviewed Technical Information related to the Minto Mine and Gregg Bush,
COO, and Telesforo Martinez, General Manager, reviewed the Technical
Information related to the Cozamin Mine.

For further information: Darren Pylot, Vice Chairman & CEO or Stephen
Quin
, President Or Zobeida Slogan, Investor Relations, at +1(604)684-8894
or toll free at +1(866)684-8894, info@capstonemining.com

For further information: Darren Pylot, Vice Chairman & CEO or Stephen Quin, President Or Zobeida Slogan, Investor Relations, at +1(604)684-8894 or toll free at +1(866)684-8894, info at capstonemining.com

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