Encouraged By Early Results In Utah
Alderan Resources Limited (ASX: AL8) has received encouraging early results from first-pass drilling at the Mizpah Prospect, part of its Detroit Mining Project in Utah, USA where it is earning up to 70% interest through an agreement with Tamra Mining LLC.
Managing Director, Peter Williams, said Alderan planned a programme of six holes for 1,200m, aiming to test the full thickness of the reactive stratigraphy beneath and down-dip of the Mizpah oxidised gold mineralisation, as well as known gold mineralised intrusives and skarns that are reflected in the ground magnetics.
“The new contiguous land position at Detroit will allow proper exploration to target and discover porphyry copper-moly-gold and related Carlin-like, distal disseminated mineralisation that has been demonstrated in the results from our first-pass drill programme at Mizpah. The project is upgraded in status and land position,” Mr Williams said.
Alderan completed a total of 1,113m in seven diamond core holes in its first-pass drill programme. Samples from six holes were submitted to ALS for analysis with gold assays received for all six of the holes. The significant exploration results include:
- DD20M-002 returned 13.3m @ 0.417 g/t Au from 51.2m to 62.4m (limestone host, Carlin-like Target);
- DD20M-003 returned 209.1m @ 0.06 g/t Au from 0.0m to 209.1m TD (Porphyry Cu-Mo-Au results);
- DD20M-004 returned 97.2m @ 0.10 g/t Au from 90.0m to 187.2m TD (Hybrid Marigold/Porphyry Cu-Mo- Au);
- DD20M-005 returned 15.4m @ 0.38 g/t Au from 19.9m to 35.2m; and 9.2m @ 0.37 g/t Au from 42.1m to 51.3m. (Carlin-like/Marigold);
- DD20M-006 returned 83m @ 0.41 g/t Au from 35.85m to 118.8m over a broad sulphide altered zone: including 6.9m @ 1.98 g/t Au from 84.6m to 91.5m in a massive sulphide zone.
- DD20M-007 returned 11.75m @ 0.17 g/t Au from 172.25m to 184.0m variable altered rocks.
Multi-element results including silver, copper and molybdenum analysis have been received for three of the holes. The intervals with very significant exploration results include:
- DD20M-003 returned 258 ppm copper and 179 ppm molybdenum over 82m from 127m to 209.1m. The interval with the highest copper and moly values (345 ppm Cu and 179 ppm Mo) is the final interval in the hole. This interval correspondences to a geologic change from high level alteration that has low magnetic response which changes to higher temperature alteration that has a stronger magnetic response that is related to logged potassic alteration with hydrothermal biotite-magnetite development.
- The highest-grade gold intercept in hole DD20M-004 (0.488 g/t Au/6.2m from 90.0m) is associated with the highest values of silver (4.9 ppm), lead (1470 ppm), zinc (3080 ppm) and bismuth (92.7 ppm) received in the drilling results to date. This is evidence of an outward flowing fluid moving along ENE trending faults from the system center.
- DD20M-006 intersected a broad zone of anomalous gold mineralization 83m @ 0.41 g/t Au (from 35.8m to 118.8m) in distinct thick zone of sulphide alteration, which included 6.9m @ 1.98 g/t Au from 84.6m to 91.5m. The highest-grade intercept occurs as semi-massive sulfide (pyrite-dominant) at the favorable Tatow – Lower Pioche stratigraphic contact. Strong shearing and faulting accompany this intercept.
The inference is that there may be a buried porphyry copper-moly-gold deposit at depth and located near the central portion of the combined tenures. There remain additional opportunities to explore for precious metal bearing distal disseminated, skarn and carbonate-replacements in the Greater Detroit Drum Mining District related to this porphyry and other similar systems. The multi-element data suggests there could be multiple mineralising events.