SEMs with check-double-checks. Prior stated efforts to proove beyond a shadow of a doubt...right hand raised...voice firm in tone...so stating the obvious without a cloud overcaste from the NM or any regulatory agency in Canada or in my minds eye the USA market forces and agencys since they trade under the OTC:BB also at BHMNF. Yeap, we wait for the beyond a shadow statements. Chucka birchmountain.com P.S.-New Entry on Page One with the Calgary Show and Tell comming up for the first couple days of October- My Hunt For Red October! Make that THE HUNT for Black October in Financial Terms, maybe basis! P.P.S.- Maybe that is a Oct 3 type date to laught about! <<..Meet the staff of Birch Mountain Resources and and learn more about opportunities to invest in junior public companies in all resource, industrial and technology sectors at: Calgary Venture Investment Conference October 3/4 1999 Calgary Convention Centre 120 - 9th Ave. SE, Calgary, AB..>> P.P.P.S.- northernminer.com and this article available from March Issue on The Resource Calculation Constraints: northernminer.com
<<..EDITORIAL & OPINION - COMMENTARY -- Resource estimation and geological constraints, Part 2
By Mark O'Dea, Michael Michaud & Ross Sherlock
Without a doubt, the most important step in deposit resource estimation is formulating a well-constrained geological model for the orebody, its shape and the structure and stratigraphy that controls it. This model serves as the backbone of the resource calculation, and it is the integrity of the resource estimate that ensures the choice of mining method, production rates and processing methods. The projections of cash-flow have integrity too.
When a resource model is not sufficiently constrained by geometrical and geological knowledge, there may be an excess of averaging between the higher and lower grade zones of the deposit. This can yield a higher-tonnage, lower-grade resource estimate and a less accurate picture of the distribution of mineralization than can a model with better geological control.
Taking an epithermal-style deposit as an example, and using the methodology we advocate, the first and most critical step in a resource calculation is to determine the geological features that control the mineralization. Is the mineralization localized along fault zones? Does it occur with silicification? Does density of veining or fracturing provide a good indication of metal tenor? Is hydrothermal brecciation important? Does host rock lithology play a role in localizing mineralization? Can solid boundaries be drawn around mineralized or potentially mineralized bodies? Once the essential geological criteria that are associated with mineralization have been established, they form the basis for defining "geologically constrained" bodies of mineralization. The information that reveals the boundaries of these zones generally comes from surface data extrapolated downdip and along strike, correlated with information from the drill logs. All of the assay results that intersect these corridors of mineralization potential go into the calculation that estimates the grade of the zone.
The accurate construction of geologically constrained zones of mineralization is extremely important for subsequent geostatistical analyses. These zones make it possible to domain the assay population and gain an understanding of the "real" metal distribution within a mineralized zone. A positive consequence of determining accurate metal distributions is the delineation of "deposits within a deposit." Conversely, discrete high-grade deposits can easily be masked within low-grade bulk-tonnage disseminated deposits if an inappropriate geological model is applied. It must be stressed, therefore, that, in the absence of geologically constrained zones of mineralization, geostatistical techniques can produce unreliable and unpredictable results.
Mineralized envelopes are not delineated by down hole assay data. They do not come from using an arbitrary cutoff grade, and they do not introduce a statistical bias to either low-grade or high-grade assays. Instead, the correct technique is based on identifying the fundamental features that host mineralization, and determining the subset of the data that comes from inside the boundaries of those features. This approach can be applied to the entire spectrum of hydrothermal mineral deposits, from porphyry coppers to volcanogenic massive sulphides.
The largest potential error in any resource model is in the way geological boundaries are linked from one drill hole to the next. Geological acumen and a firm understanding of the property geology are the most valuable assets in any resource estimation. No one can overemphasize how important it is to integrate surface mapping and accurate core logging data into the resource model. Without a robust geological model, resource estimates will seldom be reliable; in fact, their results can be detrimental, generating a false sense of confidence and hurting the investor. Resource estimation integrates the geologist, who understands the deposit; the mining engineer, who evaluates minability; and the geostatistician, who crunches the numbers. We cannot leave it just to the academics.
-- The authors are senior geologists with the mining and exploration division of Vancouver-based SRK Consulting Canada. They specialize in assessing the controls on mineralization and resource modeling for feasibility studies...>>
Let's All Read about the NEED for Palladium afterall the SEMs say we have a third OPT of the PGMs anyways: northernminer.com <<..EDITORIAL & OPINION - FACTS 'N' FIGURES -- Price rise undercuts palladium market
The volatility of palladium supply and the consequent rise in prices put the long-term future of the palladium market in doubt, according to a new study.
As prices of platinum and palladium converge, one of the major reasons for using palladium in a number of applications is disappearing. Moreover, although palladium is technically better than platinum in its main auto-catalytic application, the perception of relative stability in the long-term supply of platinum may result in a move back to it. In the meantime, thrift on the part of consumers may result in the loss of some of the traditional markets for palladium, such as dentistry and electronics.
The adoption of palladium as the main automobile emissions catalyst has led to its emergence as the principal platinum group element, rather than platinum.
The implications, in terms of both the volume and value of the market, are far-reaching, particularly at a time when the largest traditional source of palladium -- Russia -- appears incapable of meeting demand with new production. As a result, the palladium market since 1996 has been in a severe deficit, dependent on releases from the large but finite Russian stockpile built up over many years of production.
Autocatalysts, by far the largest use of PGMs, accounted for 45% of total consumption in 1998. Palladium consumption was 4.2 million oz., about 50% of total consumption. Efforts to meet ever-tightening automobile exhaust emission standards in Europe and North America have resulted in demand for autocatalysts with heavy loadings of palladium to oxidize hydrocarbons.
Palladium's resistance to heat has made it particularly effective in starter bricks, located close to the engine, which heat up quickly and control emissions after startup. They are also suitable for small, fuel-efficient cars with high engine speeds, such as those on the European market. Platinum electrodes in fuel cells have the potential to be the next major end use for platinum, contingent on the fuel cell being adopted as the power source for zero-emission vehicles. Several major car makers plan to introduce fuel-cell cars on a commercial scale by 2004-2005, by which time some 100,000 fuel-cell cars could be on the road. Each such car will use about 10 grams of platinum, or about 320,000 oz. for every million vehicles.
Jewelry remains the largest use for platinum, with considerable growth in demand from China coinciding with a decline in its use in autocatalysts. Japan and China have the largest platinum jewelry markets, having used 1.25 million oz. and 500,000 oz., respectively, in 1998.
-- The preceding is an excerpt from The Economics of Platinum Group Metals, published by Roskill Information Services. ..>>
P.P.P.P.S.- G.P.S.- Anyone have the GPS data for the Aurora or Discovery Mine, plug in the data Log and Lat here: FREE Map: spotimage.fr See my details today on MMU - Marrum Thread on there Alberta Maps. NW of us here! MMU Thread: Message 11331048 Message 11331048 siliconinvestor.com What the Heck, it is an Area Play, I hear that Griz is on the way back for soon: Subject 8393 Subject 8393 siliconinvestor.com Chucka Chucaupt-guzzintight |