Atico Mining Discovers New Massive Sulfide and Provides Exploration Update

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Sept. 12, 2017) - Atico Mining Corporation (TSX VENTURE:ATY)(OTC PINK:ATCMF) ("Atico" or the "Company") is pleased to announce preliminary results of a 15 holes, 2863 meter drill program (ATDHAR-05 to ATDHAR-19) that tested a 450 meter strike length between the northern end of the El Roble mine and a historical intersection of massive sulfide mineralization at Archie target.

Results from holes ATDHAR-05, ATDHAR-08, ATDHAR-09 & ATDHAR-10 have been received, while results from the remaining holes ATDHAR-06, ATDHAR-07, ATDHAR-11 to ATDHAR-19 are pending. Data from drill holes ATDHAR-01 to ATDHAR-04, referred to below have been reported in a previous news release dated June 26, 2013.

Fernando E. Ganoza, CEO, commented: "Intercepting a copper-rich massive sulfide fragment at the Archie target, just north of El Roble Mine, along with the newly discovered geological indications has made this site a near term priority. We will continue assessing the Archie information as it becomes available to delineate the next phase of drilling while also continuing the preparation of additional targets."

Regional Exploration Drilling Update

The highlight of the drill program was an intersection of 2.8 meters of copper-rich massive sulfide from 18 meters in hole ATDHAR-09. The intercept assayed 2.39 % Cu, 1.69 g/t Au and 6.5 g/t Ag. Hole ATDHAR-05 intersected 3.3 meters of 1.00% Cu, 0.88 g/t Au and 3.9 g/t Ag from 2.2 meters. Hole ATDHAR-08 intersected 3 meters of 1.17% Cu, 2.24 g/t Au, 6.59 g/t Ag from 157.2 meters. Hole ATDHAR-10 intersected 5.5 meters of 1.27% Cu, 0.17 g/t Au and 6.66 g/t Ag from 2.5 meters. Holes ATDHAR-03, ATDHAR-04 and ATDHAR-09 encountered "black chert", the favorable host horizon, strongly anomalous in silver at depth some 280 meters north of the Zeus mineralization. Likewise silver is strongly anomalous near the top of hole ATDHAR-02. Geochemically anomalous silver has been shown to form a halo around massive sulfide mineralization.

The drill program has significantly clarified the geology of the area between the El Roble mine and the Archie target. A sub-vertical fault filled by andesitic dykes north of the Zeus mineralization has been verified. North of this boundary there is a change in attitude of the prospective basalt-"black chert" contact from sub-vertical to east-dipping. Consequently any future exploration to trace the extent to the massive sulfide intercept in hole ATDHAR-09 should be directed to intersect this east-dipping contact at depth and along strike toward the El Roble Mine.

El Roble Mine

The El Roble mine is a high grade, underground copper and gold mine with nominal processing plant capacity of 800 tonnes per day, located in the Department of Choco in Colombia. Its commercial product is a copper-gold concentrate.

Since obtaining control of the mine on November 22, 2013, Atico has upgraded the operation from a historical nominal capacity of 400 tonnes per day.

El Roble has a measured and indicated resource of 1.87 million tonnes grading 3.46% copper and 2.27 g/t gold, at a cut-off grade of 0.93% copper equivalent. Mineralization is open at depth and along strike and the Company plans to further test the limits of the resource.

On the larger land package, the Company has identified a prospective stratigraphic contact between volcanic rocks and black and grey pelagic sediments and cherts that has been traced by Atico geologists for ten kilometers. This contact has been determined to be an important control on VMS mineralization on which Atico has identified numerous target areas prospective for VMS type mineralization occurrence, which is the focus of the current surface drill program at El Roble.

Qualified Control

Dr. Demetrius Pohl, Ph.D., AIPG Certified Geologist, a qualified person under NI 43-101 standards and independent of the Company, is responsible for ensuring that the information contained in this news release is an accurate summary of the original reports and data provided to or developed by Atico Mining Corporation. Dr. Pohl has approved the scientific and technical content of this news release.

About Atico Mining Corporation

Atico is a growth-oriented Company, focused on exploring, developing and mining copper and gold projects in Latin America. The Company operates the El Roble mine and is pursuing additional acquisition opportunities. For more information, please visit www.aticomining.com.

ON BEHALF OF THE BOARD

Fernando E. Ganoza, CEO

Atico Mining Corporation

Trading symbols: (TSX VENTURE:ATY)(OTC PINK:ATCMF)

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

No securities regulatory authority has either approved or disapproved of the contents of this news release. The securities being offered have not been, and will not be, registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act"), or any state securities laws, and may not be offered or sold in the United States, or to, or for the account or benefit of, a "U.S. person" (as defined in Regulation S of the U.S. Securities Act) unless pursuant to an exemption therefrom. This press release is for information purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities of the Company in any jurisdiction.

Cautionary Note Regarding Forward Looking Statements

This announcement includes certain "forward-looking statements" within the meaning of Canadian securities legislation. All statements, other than statements of historical fact, included herein, without limitation the use of net proceeds, are forward-looking statements. Forward- looking statements involve various risks and uncertainties and are based on certain factors and assumptions. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company's expectations include uncertainties relating to interpretation of drill results and the geology, continuity and grade of mineral deposits; uncertainty of estimates of capital and operating costs; the need to obtain additional financing to maintain its interest in and/or explore and develop the Company's mineral projects; uncertainty of meeting anticipated program milestones for the Company's mineral projects; and other risks and uncertainties disclosed under the heading "Risk Factors" in the prospectus of the Company dated March 2, 2012 filed with the Canadian securities regulatory authorities on the SEDAR website at www.sedar.com.