NEWS RELEASE

Twin Mining’s Brodeur Diamond Potential Increases

Twin Mining Corporation (TSX-TWG) is pleased to report that, based on partial preliminary results (700 out of 1200 samples picked) from the 2004 soil sampling program, potentially diamondiferous kimberlite intrusions are inferred to occur in several broad southwest-northeast belts throughout the Vista claim blocks (980,000 acres). These belts are in addition and parallel to the Freightrain-Cargo 1 corridor from which more than 50 carats of gem-quality diamonds have been recovered and the two other belts within which most of the 78 drill targets on the Jackson Inlet East and West claim blocks occur (see press release February 8, 2005). The wide distribution of kimberlite indicator minerals underscores the diamond discovery potential of the 100% owned Brodeur diamond project. So far all kimberlite discoveries on the Brodeur Peninsula made by Twin Mining were diamondiferous.

To date fifteen indicator mineral clusters have been established on Vista. Twelve(12) are newly discovered clusters based on visual grain selection and are in addition to three previously reported (press release February 6, 2004) clusters established from soil and stream sediment samples collected during the 2003 exploration season. Graphical plots of key elements in pyropes and picroilmenites from these earlier samples allow Twin Mining to confidently predict that the awaited microprobe analyses on the year 2004 grains will confirm that many are from the diamond stability field (see web-site for diagrams).

It is encouraging that two of the anomalous collections of indicator minerals are coincident with prominent aeromagnetic anomalies detected by the survey flown in the mid-1980’s by Geoterrex Ltd for the Geological Survey of Canada (“GSC”) at a flight line spacing of 1 km. Twin Mining based the staking of 32 “JI” claims on these survey data. An interpretation of the potential significance of the GSC data, prepared by Eric Anderson an independent geophysicist, in June 2002, describes these two anomalies:

1.) JI 9-1: “This is considered the best kimberlite target of those examined. If the interpreted broader magnetic field is removed, the residual anomaly fits a source having a dimension of about 600 m per side, a very shallow depth and a moderate magnetic susceptibility.”

2.) JI 10-3: “This profile contains magnetic responses from multiple sources. Two side-by-side responses were interpreted, either of which could be caused by kimberlite sources of moderate magnetic susceptibility. The southern one is interpreted to have dimensions of about 800 m per side, and the northern one about 900 m per side, each outcropping.”

Dallas Davis, Twin Mining’s Consultant – Diamond & Gold – and “Qualified Person” in the field of diamond exploration stated: “During the 2004 field season, a total of 1,200 soil samples were collected on the Vista claim blocks by Twin Mining's field personnel. Most were taken at 500 m intervals along north-south lines spaced 2 km apart. Areas covered included the previously untested northeast portion of the Vista project, the anomalous blocks identified by the 2003 stream sediment sampling and several magnetic anomalies selected by a study of the Geological Survey of Canada regional aeromagnetic data. I am delighted to see that this very productive property continues to grow in stature as a significant potential source for quality Canadian diamonds.”

Heavy mineral concentrates are extracted from soil samples at the laboratory of Vancouver Indicator Processors Inc. in Burnaby, British Columbia. Selection of kimberlite indicator minerals is by HDM Laboratories Inc. (HDM), which is operated by Dr. Malcolm McCallum who has been involved in the discovery of a number of diamondiferous kimberlites in Colorado, Wyoming, Venezuela and the NWT and B.C. In order to complete the indicator mineral selection in time to plan the 2005 exploration program, about one third of the concentrates are being picked by KIM Dynamics of Vancouver and sent to HDM for final picking and grain mounting for chemical analysis by microprobe.

Final results from the present 700 samples and the remaining 500 soil samples are expected by the end of March and will be reported as soon as they are available. A drill program for the 2005 field season is being planned to test priority magnetic targets which coincide with diamond indicator minerals in soil.

Stornoway Diamond Corporation has an option to earn a 51% interest on the Vista diamond claim Blocks (see press release August 24, 2004).

Twin Mining’s assets comprise diamond properties under exploration in Canada’s eastern Arctic, the near production Atlanta Gold Mine in Idaho, U.S.A. and the Abitibi gold properties under exploration in Quebec.