Posts Tagged molybdenum

IP/resistivity survey at the Karapinar copper project in Turkey

Posted by on Thursday, 22 September, 2011

Empire Mining Corporation announces that an IP/resistivity survey has commenced at the Karapinar copper project to seek extensions to the chalcocite enrichment blanket identified in recent drilling, and to target higher grade primary porphyry and skarn mineralization to the north of the previously drilled area. A total of eight line kilometres are planned in four north-south profiles, each two kilometres long. Dipole-dipole surveying will be used with a six dipole array, with spacing of 200 metres. Empire plans to drill test any targets generated.

Recent drilling at Karapinar (see announcement of August 23, 2011) has intersected a 60 metre zone of chalcocite enrichment in hole KDH-018 grading 0.93% copper, 0.11 gpt gold and 0.017% molybdenum from a hole depth of 79.6 to 139.6 metres. KDH-018 is one of the easternmost holes drilled at Karapinar so far and has revealed significant expansion potential.

The secondary enrichment lies beneath a 48 metre zone of oxide mineralization grading 0.25% copper from a hole depth of 31.6 metres. The combined oxide and chalcocite mineralization grades 0.63% copper, 0.11 gpt gold and 0.01% molybdenum over 108 metres. Hole KDH-018 lies 90 metres northeast of hole KDH-008 and 100 metres southwest of KDH-007, both of which intercepted secondary copper mineralization in Empire’s 2008 drilling campaign.

The presence of a chalcocite blanket at Karapinar is unusual in Turkey, due to relatively rapid uplift and erosion, although a transition from oxide to sulphide has been noted in previous drill holes and characterised by a varied amounts of chalcopyrite, chalcocite, bornite, native copper and copper oxides which enhance the copper grade in the shallower sections of drill hole.

On a larger scale, the intrusive porphyry deposit possibly extends 1 km to the north, based on copper and molybdenum anomalies to the north and lead zinc in the dolomites north of the drilled porphyry. This carbonate mass is interpreted as a large roof pendant and one hole drilled by Rio Tinto in 2003 (KDH-005) penetrated through the marble and contact skarns and into porphyry.

Empire is also planning additional mapping and sampling at Karapinar, before the next phase of drilling.

Various Karapinar maps can be viewed at the following link:

Airborne EM survey in Chile for copper-molybdenum project

Posted by on Friday, 7 January, 2011

International PBX Ventures Ltd. announces that Geotech Ltd. has completed its helicopter-borne ZTEM and magnetic surveys on the Company’s Copaquire and Huatacondo copper-molybdenum projects, located in northern Chile.

The airborne geophysical data will be analyzed to aid in the selection of drill targets for the Company’s previously announced drill program, which will commence in February, 2011 as well as for the selection of further exploration targets on unexplored areas of the property.

The airborne survey was conducted over known areas of copper and molybdenum mineralization (Sulfato and Cerro Moly) and the particular signature of these mineralized zones will be useful in identifying similar signatures in other areas in the Copaquire and Huatacondo properties.

The survey was also flown over the recently completed Titan deep penetration IP survey area, which will be the initial focus of the upcoming drill program. Comparative studies between the two geophysical surveys and subsequent drill results will be conducted in order to prioritize generated airborne survey targets over the entire property.

George Sookochoff, President & CEO of PBX, said, “We believe that this comprehensive and systematic airborne survey is an excellent tool not only to qualify new drill targets but also to get an overlook of the entire property. The Company expects to receive the results from Geotech Ltd. by the end of the month.”

The ZTEM system is one of the leading airborne geophysical systems in use today and is particularly suited to identifying large conductive ore bodies. The ZTEM system is renowned for its deep penetration, high spatial resolution and ability to detect and differentiate weak electro-magnetic anomalies at depths up to 1,500 metres.

The Copaquire porphyry includes three zones: Sulfato North, South and Cerro Moly and covers an area of about 7 square kilometres and encompasses potassic, phyllic, argillic and propylitic phases of alteration and as such possesses all the alteration characteristics ascribed to typical calc-alkaline porphyry copper systems. The porphyry has a leached cap and secondary chalcocite blanket, more typical of Andean porphyry systems like the nearby Collahuasi deposit which is exposed in the Sulfato Zone north of the Cerro Moly ridge.

Most exploration drilling to date has concentrated within a molybdenum stockwork system at the Cerro Moly Zone over an area of approximately 48 hectares. This zone remains open at depth and along the SW-NE long axis of the mineralized trend.

The Cerro Moly Zone is related to the emplacement of a distinct and younger mineralization event (Molybdenum-Rhenium stockwork) within an earlier larger porphyry copper system which hosts mostly copper mineralization.