Dart Mining’s (ASX: DTM) principal project is Unicorn – a molybdenum-copper-silver porphyry deposit with strong geological similarities to the Henderson molybdenum mine in Colorado, USA. The company also has two gold projects including Mountain View and Fairley’s disseminated gold prospect.
The Gilmore suture - a proven host of substantial porphyry mines including North Parkes, Cadia and Ridgeway in NSW and the Benambra VMS deposit in Victoria - crosses into Dart Mining’s 2500 square kilometres of tenements.
Dart Mining encouraged by intersection of strong molybdenite at Morgan Porphyry, Vic
Dart Mining (ASX: DTM) has reported that the second diamond drill hole (DMMDD002) at the Morgan Porphyry Prospect in north east Victoria has intersected strong visible molybdenite mineralisation within the upper part of the target zone.
A zone of strong molybdenite veining has been logged within strongly faulted sericite – silica altered sediments at approximately 411m depth. Molybdenite can be clearly seen on open fractures and faults and within narrow solid veins.
Preliminary logging indicates molybdenite mineralisation is best developed below a pyrite altered dacitic dyke at approximately 400m with various styles of mineralisation intersected, all appearing to pre-date pyrite veining.
DMMDD002 is currently at approximately 498 metres with the pattern of alteration and molybdenite mineralisation indicating proximity to the concealed porphyry target.
The company said the intersection of breccia zones containing more than one phase of porphyry and fragments of mineralised silica vein material is also very encouraging.
Drilling will continue to test the concealed porphyry target while also testing the depth projection of the multi-metal geochemical ring anomaly and will provide vital feedback on the geological model for the Morgan Porphyry Prospect.
The current diamond drill hole, DMMDD002, is planned to complete at approximately 700 metres.
As previously reported the level of silica – sericite alteration increased strongly below 340m down hole and a corresponding increase in molybdenite mineralisation is also clear.
Zones of strong molybdenite mineralisation are also noted in close association with later pyrite overprinting and massive pyrite veins.
These pyrite veins can contain abundant molybdenite or can separate strong silica – molybdenite veins (429.9m).
Dart Mining said the hole has yet to intersect the interpreted position of the concealed porphyry target, however narrow altered porphyry dykes and breccia zones showing altered porphyry fragments, high temperature alteration minerals and fragments of molybdenite mineralised vein silica are all present below 340m and indicate a further porphyry body may exist below the current hole position.
The lower portion of the hole will continue to test for the location of the concealed porphyry and associated mineralisation. The hole will also test the depth projection of the western ring of the multi-metal soil anomaly and will provide further alteration data to assist in refining the geological model of the Morgan Porphyry.
