SOURCE: Comstock Mining Inc.

Comstock Mining Inc.

October 05, 2015 08:01 ET

Comstock Mining Encounters Significant High-Grade Gold and Silver Intercepts

Discovers Extensive Mineralized Masses of Quartz Porphyry

VIRGINIA CITY, NV--(Marketwired - October 05, 2015) - Comstock Mining Inc. (the "Company") (NYSE MKT: LODE) today announced significant drill intercepts, both in terms of grades and thickness, resulting from the recent completion of a near-surface drill program at the Company's Dayton Resource Area, its second largest gold and silver resource area. The near-surface program consisted of 408 holes totaling 30,818 feet of drilling (see Figure 1) that was completed in late September of 2015. The Company used an extremely efficient percussion drill rig, with total program costs of about $200,000, or about $6.50 per foot.

The Company also completed underground mapping and sampling from a number of historic mine tunnels. This work, together with the drilling, resulted in several important discoveries, including defining multiple, previously undefined mineralized zones and additional dike-like masses of quartz porphyry, similar to Lucerne.

Corrado De Gasperis, President & CEO, commented, "With all the excitement around drilling the quartz porphyry mass at the Lucerne portal, I was pleasantly surprised at the magnitude of these same quartz porphyry-type discoveries in Dayton. These new discoveries have accelerated our preparation for developing these remarkable gold and silver resources into a second mine."

The main objective of the program was to pinpoint the major surface structures (faults) and then explore these structures for mineralization. This then enabled efficient infill drilling that further refined and resolved areas of structural complexity in the geologic models. The program was successful in both defining and expanding the near-surface mineralization. The Company will update its geologic model based on the results of this drilling program and increase the gold and silver resource estimate. The Company is now finalizing a comprehensive drill program designed to deliver a mine plan, economic reserves and mine life.

The most significant intercepts in terms of grade versus drilled length (grade X thickness) are summarized in Table 1.

TABLE 1 -- Drill holes with significant grade multiplied by intercept length (thickness).

Hole ID Interval Depth Intercept Length Au grade (opt.) Ag grade (opt.)
DA-119 0-60' 60 feet 0.077 0.685
DA-127 0-36' 36 feet 0.083 1.751
DA-193 30-82' 52 feet 0.066 0.408
DA-199 0-54' 54 feet 0.054 0.845
DA-200 0-82' 82 feet 0.071 0.937
DA-208 0-50' 50 feet 0.077 0.795
DA-214 20-82' 62 feet 0.048 0.663
DA-228 0-80' 80 feet 0.049 0.256
DA-232 0-82' 82 feet 0.037 0.203
DA-266 0-82' 82 feet 0.039 0.295
DA-279 0-50' 50 feet 0.065 0.261
DA-289 0-82' 82 feet 0.043 0.296
DA-292 0-82' 82 feet 0.04 0.271
DA-316 0-70' 70 feet 0.07 0.281
DA-322 0-82' 82 feet 0.054 0.564
DA-333 50-82' 32 feet 0.119 0.554
DA-344 0-70' 70 feet 0.049 0.462
DA-360 0-50' 50 feet 0.058 0.099
DA-367 70-82' 12 feet 0.266 0.437
DA-395 40-82' 42 feet 0.089 0.902
DA-403 0-82' 82 feet 0.038 0.626
DA-404 0-82' 82 feet 0.038 0.67
DA-406 0-82' 82 feet 0.044 0.323

Of the 408 holes drilled, 245 contained intercepts of 10 feet or more in length with gold grades exceeding or equal to 0.015 ounces per ton (opt.), and with an overall weighted average grade of 0.035 opt Au and 0.323 opt Ag. Out of those same 245 holes, a total of 32 contained intercepts of 10 feet or more in length with an average Au grade exceeding or equal to 0.100 opt Au., and with an overall average weighted grade of 0.148 opt Au and 0.694 opt Ag (Table 2).

TABLE 2 -- Drill hole intercepts of 10 feet or greater in length with gold (Au) grades equal to or exceeding 0.100 opt.

Hole ID Interval Depth Intercept Length Au grade (opt). Ag grade (opt.)
DA-037 20-30' 10 feet 0.183 0.533
DA-099 60-70' 10 feet 0.129 0.566
DA-100 60-70' 10 feet 0.237 0.79
DA-117 20-30' 10 feet 0.1 0.557
DA-119 10-30' 20 feet 0.139 0.626
DA-127 10-20' 10 feet 0.112 1.898
DA-188 70-82' 12 feet 0.128 0.186
DA-193 60-70' 10 feet 0.164 0.7
DA-197 10-20' 10 feet 0.18 1.09
DA-199 40-54' 14 feet 0.113 1.063
DA-200 70-82' 12 feet 0.252 1.266
DA-208 0-10' 10 feet 0.143 0.899
DA-209 30-36' 6 feet 0.114 1.55
DA-212 10-20' 10 feet 0.167 0.279
DA-215 0-10' 10 feet 0.105 0.909
DA-228 50-60' 10 feet 0.219 0.485
DA-237 10-20' 10 feet 0.131 1.44
DA-260 30-35' 5 feet 0.256 1.274
DA-273 50-60' 10 feet 0.161 0.071
DA-279 0-10' 10 feet 0.143 0.538
DA-289 10-20' 10 feet 0.142 0.148
DA-290 20-30' 10 feet 0.1 0.246
DA-294 50-60' 10 feet 0.122 0.397
DA-295 10-20' 10 feet 0.107 0.603
DA-316 30-40' 10 feet 0.184 0.238
DA-318 0-10' 10 feet 0.123 0.232
DA-333 50-60' 10 feet 0.292 0.731
DA-344 0-10' 10 feet 0.161 2.155
DA-367 70-82' 12 feet 0.266 0.437
DA-369 10-20' 10 feet 0.115 0.116
DA-395 40-60' 20 feet 0.16 0.678
DA-397 40-50' 10 feet 0.108 1.158
DA-403 20-30' 10 feet 0.1 1.05
DA-404 60-70' 10 feet 0.108 1.103

Defines Near-Surface Mineralization and Extensive Dike-like Masses of Quartz Porphyry

The underground mapping and sampling effort, together with the drilling, resulted in several important discoveries. The most significant was defining mineralization along a previously undrilled, 600-foot segment of the Grizzly Hill Fault and additional mineralization at an intersection of the Grizzly Hill and Alhambra Faults with the Silver City fault. The Company also discovered additional dike-like masses of quartz porphyry, similar to Lucerne, that generally host significant mineralization. Finally, the drilling also helped to define extended mineralization along a 550-foot segment of the Mill Fault.

The Company also commenced metallurgical test-work on representative samples of mineralized rock types. Standard column tests are currently underway on five surface-generated samples and one underground sample and is ongoing. All samples, both from drilling and underground, were analyzed for gold and silver at the Company's existing, on-site, industry standard, production assay lab.

Corrado De Gasperis, President & CEO, concluded, "These extended, thicker, higher-grade mineralized discoveries and the additional quartz porphyry discovery will expand our resource estimate, streamline our final drilling needs and progress us faster toward the commercialization of our second mine. We are thrilled with the new discoveries and I could not be prouder of our entire team's effort, especially the leadership of our geological team members."

The Dayton property includes the Dayton (Marble), Alhambra, Kossuth, Metropolitan and Gennessee patents representing a structurally controlled mineralized system hosted in tertiary volcanic rocks, that, in terms of the overall geologic setting, is similar to the Company's Lucerne property. The properties are separated by approximately one mile along the Silver City branch of the Comstock Lode.

About Comstock Mining Inc.

Comstock Mining Inc. is a producing, Nevada-based, gold and silver mining company with extensive, contiguous property in the Comstock District and is an emerging leader in sustainable, responsible mining, including concurrent and accelerated reclamations, soil sampling, voluntary air monitoring, cultural asset protection and historical restorations. The Company began acquiring properties in the Comstock District in 2003. Since then, the Company has consolidated a significant portion of the Comstock District, amassed the single largest known repository of historical and current geological data on the Comstock region, secured permits, built an infrastructure and commenced production in 2012. The Company continues acquiring additional properties in the district, expanding its footprint and creating opportunities for further exploration, development and mining. The near-term goal of our business plan is to maximize intrinsic stockholder value realized, per share, by validating qualified resources and reserves (proven and probable) from our first two resource areas, Lucerne and Dayton, and significantly grow the commercial development of our operations through extended, long-lived mine plans that are economically feasible and socially responsible.

Forward-Looking Statements

This press release and any related calls or discussions may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 about Comstock. Forward-looking statements are statements that are not historical facts. All statements, other than statements of historical facts, are forward-looking statements. Forward-looking statements include statements about matters such as: future prices and sales of, and demand for, our products; future industry market conditions; future changes in our exploration activities, production capacity and operations; future exploration, production, operating and overhead costs; operational and management restructuring activities (including implementation of methodologies and changes in the board of directors); future employment and contributions of personnel; tax and interest rates; capital expenditures and their impact on us; nature and timing and accounting for restructuring charges, gains or losses on debt extinguishment, derivative liabilities and the impact thereof; productivity, business process, rationalization, investment, acquisition, consulting, operational, tax, financial and capital projects and initiatives; recapitalization and other capital structure modifications; capital raising; contingencies; environmental compliance and changes in the regulatory environment; offerings, sales and other actions regarding debt or equity securities; and future working capital, costs, revenues, business opportunities, debt levels, cash flows, margins, earnings and growth.

The words "believe," "expect," "anticipate," "estimate," "project," "plan," "should," "intend," "may," "will," "would," "potential" and similar expressions identify forward-looking statements, but are not the exclusive means of doing so. These statements are based on assumptions and assessments made by our management in light of their experience and their perception of historical and current trends, current conditions, possible future developments and other factors they believe to be appropriate. Forward-looking statements are not guarantees, representations or warranties and are subject to risks and uncertainties that could cause actual results, developments and business decisions to differ materially from those contemplated by such forward-looking statements. Some of those risks and uncertainties include the risk factors discussed in Item 1A, "Risk Factors" of our annual report on Form 10-K and the following: current global economic and capital market uncertainties; the speculative nature of gold or mineral exploration, including risks of diminishing quantities or grades of qualified resources and reserves; operational or technical difficulties in connection with exploration or mining activities; contests over our title to properties; potential dilution to our stockholders from the conversion of securities that are convertible into or exercisable for shares of our common stock; potential inability to continue to comply with government regulations; adoption of or changes in legislation or regulations adversely affecting our businesses; business opportunities that may be presented to, or pursued by, us; changes in the United States or other monetary or fiscal policies or regulations; interruptions in our production capabilities due to unexpected equipment failures; fluctuation of prices for gold or certain other commodities (such as silver, copper, diesel fuel, and electricity); changes in generally accepted accounting principles; geopolitical events; potential inability to implement our business strategies; potential inability to grow revenues organically; potential inability to attract and retain key personnel; interruptions in delivery of critical supplies and equipment raw materials due to credit or other limitations imposed by vendors; assertion of claims, lawsuits and proceedings against us; potential inability to maintain an effective system of internal controls over financial reporting; potential inability or failure to timely file periodic reports with the SEC; potential inability to maintain the listing of our securities on any securities exchange or market; and work stoppages or other labor difficulties. Occurrence of such events or circumstances could have a material adverse effect on our business, financial condition, results of operations or cash flows or the market price of our securities. All subsequent written and oral forward-looking statements by or attributable to us or persons acting on our behalf are expressly qualified in their entirety by these factors. We undertake no obligation to publicly update or revise any forward-looking statement.

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