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Nov 02, 2005
Strong Porphyry-Related Mineralization Located in Outcrop
EDMONTON, Alberta --- Mindoro Resources Ltd. (TSXV: MIO; Frankfurt: OLM) today announced the discovery of significant porphyry copper-gold related mineralization and alteration in surface outcrops on the Tapian San Francisco Project (TSF), Mindanao Island, the Philippines.

Outcrops of phyllic-altered intrusives, 600 meters apart, with porphyry-style disseminated and vein mineralization grading in the order of one percent copper over sample lengths of 15 meters and 25 meters, were found in the vicinity of two extensive geophysical anomalies.

"These finds are suggestive of a robust porphyry copper-gold system and indicate proximity to the main part of the porphyry system," said Tony Climie, P. Geol., president of Mindoro.. "This should greatly assist in drill-hole vectoring. As operator, we have strongly recommended to our joint venture partners that we rapidly advance TSF to the drill stage".

An August 5, 2005 news release described results to date on the TSF Project, located about eight kilometers from the Boyongan and Bayogo porphyry copper-gold deposits of Anglo-Philex Gold, in a similar structural setting. A cluster of seven geophysical anomalies was defined at TSF over the past year by Induced Polarization (IP) surveys.

Recent prospecting was focused in proximity to two of these anomalies: the C5 and C6 targets. Both are reflected by extensive IP chargeability anomalies with capping resistivity anomalies and exhibit a classic Philippine porphyry expression. These are coincident with porphyry-related rock alteration and copper, gold and zinc in-soil geochemical anomalies. High-grade copper-gold-silver mineralized vein-breccia diorite boulders (to 22.9 percent copper) are associated with C5 and are interpreted as distal "leakage" from porphyry copper-gold mineralization.

The latest prospecting and geological work has located several strongly copper-mineralized outcrops in headwater creeks between the C5 and C6 anomalies over a strike length, to date, of 600 meters. The outcrops were located in high terrain with heavy jungle cover, suggesting the potential to locate more such outcrops is high.. The location of the mineralized outcrops and main features of TSF are shown in a map accompanying this release on Mindoro's website.

A channel sample of the most northern outcrop gave an average grade of 1.01 percent copper, 0.55 grams per tonne (g/t) gold and 19.02 g/t silver over 25 meters. An independent petrographic report confirmed the outcrop is strongly fractured and quartz-veined (sericite-clay-calcite (phyllic) altered quartz monzonite). Quartz-magnetite-pyrite-chalcopyrite (a copper mineral) mineralization occurs as disseminations and as veining. A channel 10 meters northeast of this assayed 0.14 percent copper, 0.4 g/t gold and 1.1 g/t silver over two meters; while an outcrop 75 meters to the southeast assayed 0.10 percent copper and 0.03 g/t gold over five meters.

Several outcrops of strongly silicified quartz diorite porphyry, with high-density quartz-pyrite-chalcopyrite veining, were located and sampled approximately 600 meters to the south and on geological trend. Results have been received from one of these outcrops, where a channel sample over 15 meters assayed 1.09 percent copper, 0.08 g/t gold and 13.03 g/t silver. Petrographic analysis conducted on a sample confirmed intense quartz-sericite-chlorite-pyrite (phyllic) alteration.

The TSF Project is one of Mindoro's Surigao Joint Venture Projects, along with the Tapian Main, Agata and Mat-I Projects. Mindoro holds a 75 percent interest in all Projects except Mat-I, where it holds a ten percent interest but can earn up to a 75 percent interest. Minimax Mineral Exploration Corp., a private Philippine company, holds the remaining interest. A Canadian company, Panoro Minerals Ltd., may earn a 40 percent interest in the Projects by funding $2 million in exploration expenditures.

The Surigao Joint Venture has one of the largest land holdings in the Surigao Gold District where several significant porphyry copper-gold discoveries have been made in recent years. A map of the Surigao Gold District is available on Mindoro's website.

Work is carried out under the supervision of Tony Climie, P. Geol., who is a qualified person as defined by National Instrument 43-101.

Click to Enlarge


Mindoro is a Tier 1 Company trading on the TSX Venture Exchange (TSXV: MIO) and the Frankfurt Stock Exchange (OLM). The company is exploring for gold and gold-copper in the prolifically mineralized magmatic arcs of the Asia-Pacific Region. Mindoro has been active in the Philippines since 1996 and is presently focused on six promising projects in politically stable jurisdictions of the country.

For further information, contact:

Head Office
Penny Gould, Executive Vice President
Phone: 780.413.8187
Fax: 780.426.2716

Investor Relations
Marshall Farris, Ascenta Capital Partners Inc.
Phone: 604.628.5800
Toll Free: 1.866.684.4209

The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.

You can view the Next Press Releases item: Thu Nov 3, 2005, MINDORO ISSUES INCENTIVE STOCK OPTIONS

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