Dynasty Metals Limited (ASX:DMA) Confirm 400 Million Tonnes from Phase 1 Drilling At Prairie Downs Tenements
Sydney, Nov 5, 2009 AEST (ABN Newswire) - Dynasty Metals Limited (ASX:DMA) announce that drilling at the Spearhole Channel Iron Deposit has identified a deposit of 400 million tonnes and is open and un-tested to the south and southwest.
Drilling has identified a Detrital Channel Iron Deposit ("DID") in the Spearhole Prospect exceeding 15m thickness from the surface, over an area of 8.4km2 (8,400,000m2). Assay results on the bulk of the 9,979 metres in the 305 holes drilled are pending. Preliminary results from the first 30 holes (10% drilled) of northern part of the 400M tonnes initial target confirm persistent intersections of haematite-rich detritals and iron pisolites over deep zones with wide intercepts (up to 40m) from surface.
Follow up test work and assessment is being undertaken on bulk samples of those intersections which show encouraging preliminary results to:
1. assess the beneficiation processes required to remove clay and free silica to produce a high grade iron ore product; and,
2. define which parts of the 400M tonnes target identified so far contain commercial tonnes and grades which could be viable to mine, process and export.
Dynasty's exploration target deposit is of the order of 1 billion tonnes of commercial grade Detrital Channel Iron on its Prairie Downs tenements. This exploration target deposit is in addition to the Bedded Iron, DSO Marra Mamba intersections previously announced.
Geological modelling of the Spearhole Deposit has shown that in excess of approximately 400 million tonnes of detrital channel iron material exist in the area drilled to date within E52/1927.
Formal resource estimations will be reported in accordance with the JORC Code when assays are received and assessed. Should this material extend over the full extent of the areas of known surficial occurrences of detrital chanel iron and have a similar thickness to that already drilled, the total exploration target deposit would range from 800 million tonnes to 1,200 million tonnes(See Note:1)
Dynasty has completed the first phase drilling of 305 holes totalling 9,979 metres at Prairie Downs, the majority of which was on the Spearhole Channel Deposit. Assay results from the program are awaited. The drilling at each of the locations is set out in Table 1.
Table 1 - Reverse Circulation Drilling - Prairie Downs Phase 1
--------------------------------------------------------------------Hole Prospect Target Number Total Avg.Series Areas Holes Meters Depth --------------------------------------------------------------------MMRC Marra Mamba Marra Mamba Formation 29 2,254 78MSRC Marra Mamba South Marra Mamba Formation 11 622 57SWRC Spearhole West Channel Channel Iron 12 372 31SERC Spearhole East Channel Channel Iron 184 5,557 30NCRC Northern Channel Channel Iron 69 1,174 17TOTAL Prairie Downs Project 305 9,979 33--------------------------------------------------------------------
The country in which the thicker sequences of Detrital Channel Iron are encountered is flat and readily accessible as shown in the photograph below. Preliminary results show that the detrital channel iron is persistent throughout the intersections from the surface (no overburden).
Detrital Channel Iron mineralisation has been encountered elsewhere in the Pilbara iron province, for example, Brockman Resources Limited has recently completed the Pre Feasibility Study for its Marillana Iron Ore Project, which is largely a "beneficiation feed hematite detrital ore".
The area of the deposit of >15m in thickness is approximately 8.4km2 or 8,400,000m2 in the area drilled to date. The average thickness is 22.25m and the estimated bulk density 2.4 tonnes per cubic metres which gives an in-situ tonnage of between 350 and 510 million tonnes.
Preliminary results from laboratory test-work of drill samples are returning in-situ grades typically 20% to 25% Fe and ranging from 15% to 45% Fe and low average phosphorous (<0.05% P). Completion of the laboratory analysis and beneficiation test work is required to determine which part of the deposit contains commercial grades of iron.
(1) Pursuant to Clause 18 of the JORC Code, please note "the quantity and grade of this deposit is conceptual in nature as there are insufficient assay and beneficiation results to define a Mineral Resource and it is uncertain at this stage whether further results and testwork will result in the determination of a Mineral Resource"
For the full release including charts and tables, please view the link:
Link: http://www.abnnewswire.net/media/en/docs/61702-ASX-DMA-468098.pdf
Contact
Malcolm Carson
Executive Technical Director
TEL: +61-2-9229-2702
Lewis Tay
Executive Director
TEL: +61-433-166-818
Ian Levy
Chairman
TEL: +61-407-189-122
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