Entrée Gold Inc. has received complete drill results for four additional drill holes at its Blue Hill target, located three kilometres northwest of the Company's Ann Mason copper-molybdenum deposit in the Yerington District of Nevada. The holes intersected both oxide and sulphide styles of copper mineralization.
Sulphide Results
Two of the core holes (EG-BH-11-019 and 021) were drilled to depths of 983 metres and 762 metres, respectively, and encountered long intervals of sulphide copper mineralization, which are marginal to the previously reported Blue Hill zone of oxide copper mineralization (see map at www.entreegold.com).
Holes EG-BH-11-019 and 021 are located approximately 300 metres southeast and 350 metres east, respectively, from historical core hole BH08001, which grades 0.25% copper over 472 metres (from 186 to 658 metre depth).
Hole EG-BH-11-021 is significant in that it not only represents an eastward step-out of copper sulphide mineralization towards the Ann Mason deposit, but the copper grades and sulphide mineralogy in this hole are similar to those found on the fringes of the nearby Ann Mason deposit.
Holes EG-AM-11-019 and 021 also intersected zones of higher grade copper mineralization and in places, higher grade molybdenum. In hole EG-AM-11-021 the main zone of copper-rich mineralization is truncated by a zone of faulting and post-mineral andesite dykes from 483 to 520 metres.
Oxide Results
Reverse circulation ("RC") drill hole EG-BH-11-028, located on the east side of the Blue Hill oxide target, returned 25.9 metres of oxide mineralization averaging 0.24% copper. The final 12.2 metres of the hole were in sulphide mineralization grading 0.26% copper that continued to the end of the hole.
One additional diamond drill hole (EG-BH-11-031) was collared 750 metres east-southeast of hole EG-BH-11-019. This hole was terminated in mineralization at 33 metres and intersected oxide copper mineralization averaging 0.31% over the final 11.3 metres. Most importantly, this is in an area with no previously documented copper mineralization. The hole was drilled between Blue Hill and Ann Mason and lies along the northern margin of a large geophysical IP anomaly. Blue Hill and Ann Mason sulphides occur along the western and eastern flanks, respectively of this same IP anomaly.
Entrée's President & CEO, Greg Crowe, commented, "The presence of copper mineralization in hole 031 between the Blue Hill prospect and the Ann Mason deposit highlights this area as a prime exploration target. Copper mineralization at Blue Hill and Ann Mason occurs along the flanks of a large IP anomaly covering a northwest-southeast strike distance in excess of 3 kilometres. The proximity of Blue Hill to Ann Mason, along with the presence of both oxide and sulphide styles of mineralization make this a prime area to focus future exploration, while at the same time continuing to expand the mineralized footprint of the Ann Mason porphyry system."
Discussion
Twenty-four RC holes totalling 4,266 metres and seven diamond drill holes totalling 2,590 metres have been completed since 2010 on the near-surface Blue Hill oxide target. The copper oxide mineralization extends from surface to an average depth of 185 metres, over an area of 650 by 500 metres and remains open to the northwest and southeast. Drilling at the sulphide target remains very wide spaced, but has identified a target area more than one kilometre in width, which still remains open in most directions. Significant molybdenum mineralization was also intersected in two of the drill holes targeting the sulphide mineralization. IP surveys show a continuous, strong chargeability anomaly between Ann Mason and Blue Hill suggesting significant exploration potential over this three kilometre distance. Additional RC and diamond drilling is planned at Blue Hill to continue testing shallow oxide and deeper sulphide targets.
Drill chips and split core samples were prepared and analyzed at ALS Minerals in Reno, Nevada and Vancouver, BC. Prepared standards, blanks and duplicates are inserted at the project site to monitor the quality control of the assay data. Drill intersections described in this news release are based on core lengths and may not reflect the true width of mineralization.