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July 02, 2015 1:43 AM ET

Metals and Mining

Company Overview of Excelsior Mining Corp.

Company Overview

Excelsior Mining Corp. engages in the acquisition, exploration, and development of mineral properties. Its principal project is the Gunnison Copper Project covering an area of 6,405 acres located in Cochise County, Arizona. The company was incorporated in 2005 and is headquartered in Phoenix, Arizona.

1140 West Pender Street

Suite 1240

Vancouver, BC V6E 4G1

Canada

Founded in 2005

Phone:

604-681-8030

Fax:

604-681-8039

Key Executives for Excelsior Mining Corp.

Chief Executive Officer, President, Director and Member of Project Steering Committee
Age: 52
Executive Vice President and Director
Age: 50
Compensation as of Fiscal Year 2013.

Excelsior Mining Corp. Key Developments

Excelsior Mining Corp. Completes Hydrology Pump Tests for Feasibility Study

Excelsior Mining Corp. announced that feasibility level hydrological test work has been completed at the Gunnison Copper Project in Arizona. A total of 26 hydrological test wells, totaling 25,870 feet of drilling, were used in the current hydrological test program. The holes were drilled in various locations around the North Star deposit, representing a variety of fractured zones, rock types and mineralized areas. Of the 26 holes drilled, 18 were pump test holes and 8 were observation holes. The pump test holes were pumped for approximately five days and were surrounded by the new observation wells and by numerous pre- existing observation wells. In all, approximately 65 observation wells were monitored during the pump testing, generating a comprehensive high quality data set. The data collected from this program will be used to characterize the various groundwater properties that determine the movement of fluids through the mineralized bedrock. This information will be used to produce 3D hydro-geological models for requisite permit applications and the bankable feasibility study. The 3D hydro-geological models will simulate the planned in-situ recovery process and demonstrate hydraulic control during mining operations. Excelsior management expects the results of all testing, and 3D models will be completed by early third quarter.

Excelsior Mining Corp. Announces Completion of Hydrology Drill Program At the Gunnison Copper Project in Arizona

Excelsior Mining Corp. announced the completion of the hydrology drill program at the Gunnison Copper Project in Arizona. Excelsior is also releasing the diamond drill assay results from the feasibility resource upgrade program. The hydrological drill program announced on October 28, 2014 has now concluded. The primary component of the hydrological program comprised 26 hydrology test and observation wells totaling approximately 28,000 feet. Extensive geophysical logging was completed on all holes. Pump testing has begun and will continue over the next several months. The objective of the program is to characterize the hydrological parameters of the mineralized rocks by measuring groundwater movement through the rocks. Results will be used to construct a numerical groundwater flow model to simulate in-situ recovery operations and to assist with permit applications. Additional long-term aquifer testing will also be conducted on previously constructed wells. Data interpretation and modeling is expected to be completed in second quarter of 2015. Assay results for the geological drilling program consisting of 13 diamond drill holes, totaling 17,110 feet, have now been returned. The program was designed to investigate the marginal extremities of the North Star deposit and collect additional geological information. Results are consistent with expectations and previous drill holes in the area. A new resource calculation will be incorporated into the feasibility study currently being prepared, together with additional data from the comprehensive metallurgical and hydrology programs. Total copper grades should be considered in the context of the proposed mining method. Excelsior intends to mine the Gunnison Copper Project using in-situ recovery, whereby a weak acid solution dissolves copper minerals from the surfaces of naturally occurring fractures. The host rocks remain substantially undisturbed; however, the host rocks must be included in the calculation when determining total copper grades for the purpose of establishing a mineral resource that is prepared in accordance with National Instrument 43-(101). All samples were prepared from manually split half-core sections on site in Arizona. Split drill core samples are then sent to Skyline Assayers &Laboratories in Tucson, Arizona, an independent laboratory, for Total Copper and Sequential Copper analyses. Skyline is accredited with international standard ISO/IEC 17025:2005 General Requirements for the Competence of Testing and Calibration Laboratories. Total Cu (TCu), acid soluble Cu (ASCu) and cyanide soluble Cu (CNCu) were analyzed. The drill holes are vertical and the mineralization ranges from flat lying to a 30 degree dip to the east resulting in a 1 to 1 relationship between sample length and true thickness to a 1 to 0.87 relationship between sample length and true thickness depending on the dip of the mineralization.

Excelsior Mining Corp. Presents at Vancouver Resource Investment Conference, Jan-19-2015 11:00 AM

Excelsior Mining Corp. Presents at Vancouver Resource Investment Conference, Jan-19-2015 11:00 AM. Venue: Vancouver Convention Center, 1055 Canada place, Vancouver, British Columbia, Canada.

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