TGS
Geology
The Lupoto Permit (PR 2214) sits within the Central
African Copper belt and covers a sequence of
Kundelungu or Roan Supergroups sediments folded int
o broad synclinal and anticlinal structures.
East-west and west-northwest to east-southeast faul
t zones trending at high angles to the fold-axes ha
ve
led to major displacements of strata during folding
and the formation of fault breccias that represent
important exploration targets. The Sase Project is
located in an area of intersecting splay structures
associated with a major project scale fault system,
the Sase Fault Zone. Several other analogous
geological settings have been identified in other p
arts of the Lupoto Project area.
Mineralisation
Mineralisation at Sase is hosted in intensely brecc
iated sedimentary rocks, mainly carbonaceous
siltstones, shales and dolomites of the Lower Kunde
lungu Group. These stratigraphic units are known to
host one of the world’s largest Pb-Zn-Cu deposits a
t Kipushi, 50km west of Lubumbashi in the DRC.
Mineralisation appears to be controlled by a set of
splay faults that have been traced over a distance
of 4
kilometres and are associated with the Sase Fault w
hich is at least 15kms in length.
Copper mineralisation at the Sase Project occurs ab
ove and below the base of oxidation. Malachite and
azurite to a lesser extent are the principle copper
oxide minerals and occupy breccia matrixes and vug
hs.
Chalcopyrite and to a lesser degree chalcocite are
the main sulphide copper minerals and occur
preferentially in fault breccia matrices, veins and
to a lesser extent as stratiform mineralisation. T
he bulk
of the mineralisation identified to date occurs in
the oxide zone between 15 and 120m below surface.
The Lupoto Project is located in an area of intersecting splay structures associated with a major project scale fault system, the Sase Fault Zone. Fault breccias related to the fault systems represent important exploration targets.
Several other analogous geological settings have been identified in other parts of the Lupoto Project area. Mineralisation at Sase is hosted in intensely brecciated sedimentary rocks, mainly carbonaceous siltstones, shales and dolomites of the lower kundelungu group.
These stratigraphic units are known to host one of the world’s largest Pb-Zn-Cu deposits at Kipushi, 50km west of Lubumbashi in the DRC.
Ivanhoe discovery geologically just next door.......
Ivanhoe Mines Reports Exceptionally High-Grade Silver, Zinc and Copper Assay Results from Big Zinc Drill Holes at the Kipushi Mine in the Democratic Republic of Congo
T.IVN | 13 hours ago
34.5-metre intercept graded 35.1% zinc, 10.7% copper, 479 grams/tonne silver, 77 g/t germanium and 0.30 g/t gold Additional high-grade zinc intersections recorded outside the historical Big Zinc resource
LUBUMBASHI, THE DEMOCRATIC REPUBLIC OF CONGO--(Marketwired - Nov. 24, 2014) - Robert Friedland, Executive Chairman of Ivanhoe Mines (TSX:IVN), and Lars-Eric Johansson, Chief Executive Officer, announced today that additional, exceptionally high-grade silver, zinc and copper drill intercepts have been reported in the third batch of assay results from the company's underground diamond-drilling program at the Kipushi copper-zinc-germanium-lead and precious-metals mine.The new results include those from the first hole, KPU040, drilled through the historical Big Zinc zone from the hanging-wall drill drift on the 1,272-metre level, which provides the geometry for near-true-width intercepts. KPU040 was drilled on section 3 North and intersected high grades of base and precious metals mineralization:
- 70 metres grading 43.0% zinc, 5.5% copper, 244 grams per tonne (g/t) (7.8 oz/tonne) silver and 71 g/t germanium and 0.1 g/t gold.
Approximately one-half of the KPU040 intercept consists of a precious-metals-rich, very high-grade copper-zinc zone, which returned:
- 34.5 metres grading 35.1% zinc, 10.7% copper, 479 g/t silver (15.4 oz/tonne), 77 g/t germanium and 0.30 g/t gold.
Within the same interval, KPU040 also intercepted a zone of exceptionally rich silver, zinc and copper mineralization, which returned:
- 9.7 metres grading 19.9% zinc, 21.1% copper, 1,573g/t silver (50.6 oz/tonne), 65g/t germanium and 0.80 g/t gold.
This intercept correlates with the previously reported high-grade copper-zinc intercept in nearby hole KPU003, which returned 31 metres grading 44.5% zinc, 6.1% copper, 144 g/t silver, 67 g/t germanium and 0.1 g/t gold.Mr. Friedland noted that although Kipushi was one of Africa's richest copper and zinc mines, the records from its first 68 years as a producing mine did not mention the actual production of precious metals.
"Now, our discovery of high-grade copper-zinc-silver mineralization with significant gold and germanium values within the Big Zinc zone confirms our hypothesis that copper zones, which also are rich in precious metals, exist within the deep, unmined portions of the Kipushi Mine. These zones now present new and compelling targets for our ongoing exploration."New intersections show potential to expand southern limit of historical Big Zinc resourceHole KPU042 on the southern margin of the historical Big Zinc resource returned the following intersections of high-grade mineralization:
- 43.2 metres grading 42.0% zinc, 0.5% copper, 14 g/t silver and 45 g/t germanium, and a second intercept of 12.9 metres grading 46.9% zinc, 0.3% copper, 5.0 g/t silver and 86 g/t germanium.
Two drill holes completed south and outside of the historical Big Zinc resource returned zones of high-grade mineralization:
- KPU033 drilled on section line 1: 37.9 metres grading 42.0% zinc, 0.3% copper, 10 g/t silver and 36 g/t germanium.
- KPU037 drilled on section line 0: 27.5 metres grading 40.6% zinc, 0.4% copper, 19 g/t silver and 43 g/t germanium.
The new assay results also include the following intersections from the Nord Riche (North Rich) and Série Récurrente (Recurring Series) zones:The Série Récurrente intercepts are true widths. The Nord Riche intercepts are not true widths as Ivanhoe does not yet know the geometry of the zones. A complete summary of recent assay results at Kipushi is in Table 1, on page 14.
- KPU026 (Série Récurrente zone): 4.4 metres grading 15.6% copper, 17.3 % zinc and 38.0 g/t silver.
- KPU045 (Série Récurrente zone): 5.0 metres grading 3.3% copper, 41.3% zinc and 24.0 g/t silver.
- KPU028 (Nord Riche zone): 7.1 metres grading 3.6% copper, 0.1% zinc and 6.0 g/t silver.
- KPU032 (Nord Riche zone): 24.2 metres grading 2.8% copper, 23.8% zinc and 8.0 g/t silver, including:
- 6.0 metres grading 10.9% copper, 24.2% zinc and 31 g/t silver.
A compilation of Ivanhoe's drill results to date indicates that the Série Récurrente zone forms a westerly-plunging shoot of high-grade copper-rich massive sulphide that is open up-plunge, and requires more drilling to define its down-plunge extent (Figure 10). Historical drilling by Gécamines intersected this zone up-plunge but it was not mined."These latest assay results demonstrate the world-class grades and untapped potential of the Kipushi deposit," Mr. Friedland added.
"Our continuing exploration drilling will continue to test for extensions to the Big Zinc and the newly discovered high-grade precious metals mineralization."
Ivanhoe now has completed 62 holes totalling approximately 12,000 metres of its planned 20,000-metre underground diamond drilling program. Assays for holes one through 47 have been released, while assays for hole 46 and holes 48 through 62, are pending. The company has streamlined its sample dispatch process to the analytical laboratory in Australia, which is expected to improve the turnaround time for future assays from Kipushi.
Two diamond-drill rigs continue to complete confirmatory drilling of the Big Zinc zone from the hanging-wall drill drift on the 1,272-metre level. Deep drilling is planned to test for depth extensions to the Big Zinc zone, including the recently discovered precious metals-rich high-grade copper-zinc zone in hole KPU040.
"We are delighted by our discovery of a significant zone of high-grade copper, germanium and precious metals within the Big Zinc. We will continue drilling off the Big Zinc from the 1,272-metre hanging-wall drift to delineate and explore this remarkable mineral discovery," said Mr. Johansson.
Germanium is a key component of high-efficiency solar cells that are up to twice as efficient in converting solar energy into electricity than traditional, silicon-based cells.
"At current spot prices of approximately $1,900 a kilogram (approximately $59 per troy ounce) for germanium and $16.50 an ounce for silver, the germanium and silver grades have the potential to significantly add to the overall metal value at Kipushi," Mr. Johansson added.
"The Big Zinc is sulphur rich, which also represents a potentially significant value addition given the scarcity of primary sulphur supply in the Copperbelt region, and the demand for acid in conventional in-country oxide recovery circuits."
Read more at http://www.stockhouse.com/news/pres...ver-zinc-and-copper-assay#xTRRZLgsjeAiyHSk.99
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