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Richardson 2016 Soil and Rock

Richardson 2016 Soil and Rock

Richardson 2016 Soil and Rock

Tintina Belt

Infrastructure and Regional Activity
Richardson and Hilltop Surface Sampling Future Exploration
Richardson Property Democrat Pit Cross Section Richardson Property Democrat Pit Cross Section

Big Gold Footprint, Superior Location

  • 28,763 acre property, Located in the Tintina Gold Belt
  • Big Gold footprint, Multiple distinct styles of intrusive-related gold mineralization
  • The property is adjacent to the Richardson Highway, roughly 115 kilometers southeast of the city of Fairbanks and an all-weather road leads to the project from the highway
  • High transmission power lines run to the north and south of the property and the Trans-Alaska Pipeline runs along the property’s northern boundary
  • Large historic dataset includes: 39 core and 52 RC drill holes, 52miles2 of airborne geophysics, 3,654 rock samples, and 3,542 soil samples
  • Placer gold has been produced historically from the property

“Richardson is one of the few gold exploration properties in Alaska which is road accessible, bound on two sides by high transmission power lines, located in an mining friendly jurisdiction, and host to multiple, large gold footprints,” stated Northern Empire’s Chairman, John Robins, P.Geo. “The initial results from both the Democrat Pit area and the Wide Zone, including finding high grade gold and silver in outcrop at the Democrat Pit, have greatly refined our areas of focus for the 2016 exploration season.”

Executive Summary


The Richardson Project may well be one of the most attractive exploration targets within the Tintina Trench. Road access is excellent and well within the Alaska power corridor with high power transmission lines located on both the northern and southern property boundaries.
Over 113 km2 controlled 100% by Northern Empire supports a well-funded and systematic 'good science' approach to discovery on Richardson.

Past exploration, including 3,654 rock samples; 3,542 soil samples; 39 core holes; 52 RC holes; trenching; and bulk sampling, has identified multiple gold targets at Richardson. These include the large gold footprint targets at Democrat Pit, Shamrock, and the Wide Zone, which offer multi-million ounce discovery potential within a 'drive-to' proven Alaskan gold province.
Multiple styles of intrusive-related gold mineralization (IRG) have been identified at Richardson and include geological and geochemical signatures similar to Pogo and Fort Knox
A re-examination is now in process of all of the available historic data collected within the Richardson District to formulate a systematic approach to evaluating the project. Northern Empire's team believes that the Richardson District offers a high potential for discovery within the prolific Tintina Trench.

Location and Access
The Richardson Project is an exploration stage gold project, held 100% by Northern Empire Resources Corp., located 115 kilometers southeast of Fairbanks and 40 kilometres northwest of Delta Junction in east-central interior Alaska. The property is bordered on the south by the all-weather and paved Richardson Highway including a highway power line transit and, on the north by the Trans-Alaska Pipeline and another high power transmission line. Access into the interior of the property from the paved highway is via a system of gravel roads and trails which makes most points within the project area very accessible.


The 2015 program included review of all available historic data, prospecting, and the collection of 256 soil samples and 25 rock samples.
Highlights from this work include:


  • Rock grab samples from outcrop in the Democrat Pit zone returned highlight assays:

    71.2 g/t Au and 48.6 g/t Ag
    4.6 g/t Au and 111 g/t Ag
    2.0 g/t Au and 233 g/t Ag
    5.88 g/t Au and 6.09 g/t Ag
    and 1.78 g/t Au and 67.3 g/t Ag

  • Soil samples collected on two east to west soil lines to the north, 800 metres and 400 metres respectively, of Democrat Pit both returned anomalous gold-in-soils values. Soils collected here are also statistically high in silver; 
  • Soils collected along two east to west reconnaissance lines in the Wide Zone returned anomalous gold and copper values;
  • Exploration targeting in 2016 will now be based upon the 2015 results, supported by a compilation and review of historic results which includes data from a bulk sample and drilling at Democrat Pit, more than 2000 soil, rock and stream samples collected in the Richardson gold district and trenching.

2015 Program Summary:

The work program at Richardson was completed in two phases (Phases 1 and 2) between June and August 2015, and focused on soil sample lines north of the Democrat Pit, portions of the adjacent intrusive body known as the Wide Zone, and at Tenderfoot Creek. Both the Phase 1 and 2 rock sampling and Phase 1 and 2 soil programs resulted in assay results anomalous in gold, silver and/or copper. Phase 2 included the collection of soils taken 400 metres to the north of the brecciated quartz feldspar porphyry “QFP” in the Democrat Pit and highlighted the potential for a gold bearing structural corridor extending at least 800m to the north from the northern margin of the Democrat Pit.

23 rock samples were taken in or near to the Democrat Pit zone, with values ranging from a high of 71.2 g/t Au to a low of 0.005 g/t Au; a high of 233 g/t Ag to a low of 0.01 g/t Ag.

A review by Northern Empire of drill logs and drill core from drilling conducted in 1988 and 2005 by previous exploration groups, shows that mineralization in the Democrat Pit and along the mineralized Richardson Lineament is hosted in fault bounded brecciated Rhyolite Porphyry and coeval fine grained intrusives. The Wide Zone, though not exposed, shows a high degree of QFP and quartz vein components in chip and rock fragments noticed in soil samples collected in the “B” soil horizon throughout the area.

Exploration History

Placer gold was first discovered on the property in 1905 and records suggest that placer gold was produced from the property. This includes at least two occurrences of eluvial placers. Lode gold was discovered some years later but saw only modest lode gold production.
Since 1987 multi-phased work on the property includes the collection of 3,654 rock and 3,542 soil samples, 52 square miles of airborne MAG and EM, 52 RC Holes and 39 Core holes. According to a 1990 State of Alaska publication entitled “ALASKA’S MINERAL INDUSTRY, 1989” Division of Geological & Geophysical Surveys SPECIAL REPORT 44 (Bundtzen, Swainbank, Deagen, and Moore), the Democrat Pit was the site of a 70,000 short ton bulk sampling program in 1988 where 2,000 ounces of gold was recovered.

Regional Geology

Covering approximately 28,000 acres, the Richardson Project lies within the Yukon-Tanana Terrane (YTT), a composite crystalline geological terrane bounded by the right-lateral Denali Fault to the north and the Tintina Fault to the south. Late Cretaceous to early Tertiary dextral motion along the Tintina Fault displaced this portion of the YTT 430 kilometers westward relative to equivalent rocks in the Yukon Territory. Broad elliptical exposures of high grade gneiss and schist define clusters of gneiss domes, partially surrounded by greenschist facies rocks. The Richardson District is centered on the NW trending Richardson Gneiss Dome (part of the larger Salcha River Gneiss Dome complex). Contacts of the gneiss domes are stitched by late Cretaceous granitic intrusions. These intrusions have been dated at +-90Ma, the date of most intrusion related gold mineralization within the Tintina Trench.

Property Geology

Broad outcrop patters within the mid-Cretaceous Richardson Gneiss Dome (paragneiss: psammite, pelite-meta-pelite, quartzite and conglomerate) define a central core of migmatite, mantled by layered and folded gneiss which in turn is surrounded by generally outward dipping schists. A number of district scale faults cut the project area; the most prominent being the WNW to NW striking Richardson Lineament which is a +- 1 km fault zone dipping NE and located along the boundary of gneiss to the east and schist to the west. Local granitic to monzonitic intrusions and dikes have an age date of +- 90Ma.
The Richardson District has a long history of placer mining starting in 1905. Lode gold occurrences have been noted and, to some extent, exploited (albeit on a very small scale). All the lode gold occurrences within the Richardson Project area are consistent with the IRG gold deposit model. Project scale exploration has identified a number of intrusion related gold systems on the project. Exploration priorities for this type of mineralization include:
Democrat/Richardson Lineament, Shamrock and Hilltop.

Gold mineralization at the Democrat pit along the Richardson lineament is associated with a linear cluster of quartz-feldspar porphyry (QFP) 'fingers' along the 7km + Richardson Lineament. Emplacement of the QFP is via smaller apophyses from a larger underlying granitic intrusion at depth. Gold mineralization here is characterized by a highly volatile elemental component, a near 1:1 Ag to Au ratio, strong elemental pathfinder associations including Bi and Sb, brecciation and an overall Greisen alteration including intense sericite and limonitic alteration.

The project area is cut by numerous conjugate faults and intruded by a varying degree of stocks and dikes ranging from monzonite to granitic and included quartz-feldspar porphyry. Re-activation from the north-west bounding Salcha River fault and the south-east bounding Shaw Creek fault created mineralizing opportunities within and on the margin of these intrusions and within the body of the Richardson Gneiss and include rheological contrast seen clearly in airborne geophysics and pathfinder elemental associations within the soil geochemical database.

Alteration and Mineralization

There is less than 5% outcrop on the Richardson Project. On the Hilltop prospect there are no outcrops. Alteration and mineralization is best defined from a number of drill hole intercepts, trenches and pits. Alteration associated with gold mineralization varies from Greisen at and along the Richardson Lineament to intense limonitic and silicification at Hilltop. Associated minerals to gold mineralization include bismuthinite, tourmaline, antimony and pyrite/arsenopyrite. Pan cons include such minerals as Scheelite and Cassiterite. There is a strong correlation between Be and Au along the Richardson Lineament and very close correlation between gold and Bi, Te, As and Sb from drill intercepts at Hilltop. Overall, the gneiss and schist rocks at Richardson are characterized by greenschist-amphibolite facies alteration and include important and locally intense silica, sericite and limonitic alteration.

Historic core hole intercepts feature anomalous mineralization but subsequent exploration has failed to follow up these anomalous values in any significant way.

Hand dug pits to bedrock have sampled altered gneiss and schist with results warranting follow up. Top of bedrock soil sampling has highlighted multi-km2 footprints of anomalous gold and including intrusion-related pathfinder elements As-Bi-Te-Sb-Pb-W-Ag-Mo and Sn. Priority targets include Hilltop (9km2), Shamrock (6km2) and the Richardson Lineament (8km2).

Surface Geochemistry

Over 3500 soil samples (generally top-of-bedrock soils) have been collected on the Richardson property as well as 547 pan cons and 2,067 stream seds. Au anomalies in soils define 8 strong Au in soil footprints anywhere from 2-9km2. Much of the Richardson Project area has not seen any exploration and leaves open the opportunity to further identify important exploration targets.

Elemental pathfinder associations within the geochemical database show strong correlations including Au-Te-Bi, Au-Sb-Bi-Te-W-Pb-Sn, Au-Hg, Au-Cr-K, Au-Be, Cu-Zn-Pb, Cu, Cr etc. Recognition of these elemental associations prove that multi-dimensional mineralizing systems exist within the property boundaries of the Richardson Project and highlight areas for immediate focus: Hilltop (9km2), Shamrock (6km2) and the Richardson Lineament (8km2). Gold mineralization at Richardson is not confined to one system.

Gold mineralization at Richardson is not confined to one system.


Over 52 square miles of Mag and EM were flown over Richardson and the surrounding area in 1994. Flight lines were orientated N-S with a line spacing of 400m.Though flight lines are coarsely spaced, interpretation of the Mag and EM data shows the complexity of the multi-target Richardson Project. Generally speaking, the Mag shows good contrast between the major rock units (gneiss and schist) and pinpoints the contact relationships between the gneiss, schist and intrusions. EM highlights the fault boundaries well and shows positive correlation with re-activated rheological boundaries.

William J. (Bill) Cronk, P.Geo., is the qualified person who reviewed and approved the technical information contained in the preceding project summary.