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geowizardRe: Buried Treasure!
Muley,

That's good advice.

I use drills that I can keep at least 7000 lbs of weight on the bit.

Thanks!

-Geowizard
MuleyRe: Buried Treasure!
Geowizard,
Fantastic presentation on the value's of using modern technigues for prospecting, I plan to read it again.
As far as portable drill's go, be careful not to go too light and end up bouncing on the rock instead of cutting through it.
ScrubRe: Buried Treasure!
Most of the areas mentioned are either claimed or unavailable. If it's not already claimed, it's Doyon, BLM or other Federal. Doyon is no longer accepting applications for placer mining. Federal is tough due to the restrictions too inumerable to mention in this blog.

Is it even legal to prospect on Doyon & BLM w/o a permit?
geowizardRe: Buried Treasure!

With reference to Millrock Alaska;

Here's an overview of their Fortymile project:

http://millrockresources.com/projects/fortymile/

Millrock uses a "Project Generator" business model. They recognize the important contribution made by geophysics and follow-up drilling.

The Fortymile is rich in buried treasure. The old-timers used the tools they had to explore for gold. They were successful in finding much of the gold that was in obvious localities. Gold eroding into creeks and streams is a "no brainer". Digging holes and panning gold are skills that can be learned in less than an hour.

Metal detectors have added a new dimension to prospecting for gold. The technology applies to airborne geophysical surveys. Scientists at Alaska DGGS are involved in continued surveys of the mining districts in the state. Millions of dollars are being spent every year to define new mineral deposits.

There is a window of opportunity for prospectors!

Interpretation of the data is showing me that mineralization is present that supports known and some unknown placer gold deposits. Many of those deposits remain unclaimed. These geophysical anomalies offer an "opportunity" for prospectors to get on a mineral deposit that is supported by geophysics.

The probability of success is much greater digging a hole looking for gold when a metal detector has indicated the exact location to dig. It is unfortunate for miners of the past that did not have the technology.

- Geowizard
hoppingforpayRe: Buried Treasure!
If you head due North you run into this claim block.

http://www.millrockresources.com/projects/fortymile/

A friend of mine (I have them in real life) staked some of what turned out to be some of the better ground. Twice he declined offers from Teck and perhaps Millrock,I'm not sure. The last offer was seven figures. He has held these claims for 14 years. It gets spendy to do this...hopefully he gets more offers.

Napolean Creek has good gold down by the South Fork but it disappears as you head up the creek to what may or may not have been the source. This is evident by countless prospecting shafts in the creek but no workings. Maybe it was high standards just not enough..

Their was some gold on Robinson at the mouth but apparently it disappeared to the operator when moving up the creek.

I walked up it a ways and it looked like the old timers left it alone. I didn't go far up the creek because I wasn't that interested in it because the creek is too small for what I was doing. There might be something on it but if so it is probably in discontinuous streaks that would baffle and lesson it's value. and the interest of knowledgeable heavy equipment operators.

One must also consider when using geophysical maps and what not for placer, is all the other variables not on the map.Like the whole mountain that eroded before the survey, the grade of the stream,the old timers. Their were lots of miners in the Jack Wade valley and they no doubt went up and dug holes on all the side creeks to bedrock. Is there gold on some of these side creeks? Probably, but being coarse gold country the best and cheapest way to find out is to camp out, melt and dig holes to bedrock. Not too many prospectors doing this. You could use a metal detector but these have better results in ground that has been torn up by equipment. Seldom is the bedrock close enough to the surface in undisturbed creeks to ever get a metal detector close enough to get a nugget reading. You would want to use a pan anyway to assess ground because specks count if you are able to find shallow bedrock.

The old timers miss ground on occasion but looking at ground they ignored is more risky for returns than going someplace that they actually hand dug gold out.

Most of the mining claims in Ak are pretty much worthless, if I were to guess I would put the number around 97%. Most claims are just claims around someone elses claim who is around someone elses claim and on and on it goes....I believe somewhere around 45,000 claims this past year were filed.

So do the maps show something at the mouth? There was a buried treasure there...

Good day gentlemen it's been real (sort of) and fun but not real fun! Carry on!
geowizardRe: Buried Treasure!

The Mattabi deposit, Sturgeon Lake, Canada is an example of a Grade 6 deposit.

Sturgeon Lake is now a past producer.

It produced 2.1 Mt (Million tonnes) of 2.98% copper, 10.64% Zinc, 1.47% Lead, 6.14 opt silver, and 0.21 opt gold.

Gold production was 4410 ounces.

Silver production was over 12 million ounces.

10 percent copper = about 200,000 pounds.

A Grade 7 anomaly was Montcalm nickel-copper, Timmins, Ontario, Canada. The Kidd Creek Proven and Probable reserves are 19 Mt of 1.8% copper, 5.5% zinc, .18% lead, and 53 gpt silver.

http://www.mining-technology.com/projects/kidd_creek/

These are examples - your results may vary! :smile:

- Geowizard
geowizardRe: Buried Treasure!

Big nugget or little nugget? :confused:

Metal detectors respond by producing a signal. The signal is proportional to the conductivity of the target.

Little nugget = "Wheee!"

Big nugget - "WHEEE!!!"

A world class deposit is classified as a deposit that has a conductivity-thickness product greater than 100. They are referred to as Grade 7.

The next lower grade is Grade 6. Grade 6 anomalies have a conductivity-thickness product of 50 to 100.

Both of these targets are Grade 6 anomalies.

This grading system is based on current producing mines and their response to the geophysical survey system employed in this survey.

Is it magnetite?

Magnetite is magnetic. The system that was used in the discovery of this anomaly contained a calibrated Cesium vapor magnetometer and a second magnetometer reference station to eliminate diurnal variation.

The magnetic response was 14 nT (very low). Surrounding levels were greater.

All of this indicates noble metal mineralization with surrounding increasing levels of magnetite.

- Geowizard
geowizardRe: Buried Treasure!

Exploration drilling is used to define the deposit.

Definition of the grade and extent of the deposit allows a miner to forecast the financial return on investment and to budget cost of mining while predicting revenue. The cost of exploration drilling is minimal compared to the cost of sinking a shaft. Exploration drilling can continue at the same time a shaft is being sank. The shortest path to the deposit is a vertical shaft. Since there must be a local outcrop of gold bearing mineralization (as evidenced by placer gold in Robinson Creek), it is prudent to look along the west slope of the hillside. Geo-chem sampling by trenching or augering could lead to the discovery of an outcrop.

The first objective is to be able to mine into the deposit and produce revenue during the process of mining. Otherwise a cost analysis of mining versus return on the investment becomes a necessary part of the work to be done. The importance of planning on the cost of mining cannot be under-estimated. With adequate definition of the deposit from exploration drilling, and news of the discovery, funding opportunities will present themselves. Gold miners that have producing mines often are self-funding.

The preferred approach to mining as relates to shaft sinking, is to contract the mining to a shaft sinker. Shaft sinkers work on contract. They take care of their own personnel, are insured and bonded. Details related to construction of a head frame and collar are managed by the shaft sinker. If an outcrop is discovered on the west slope, an adit can be driven directly along mineralization to the deposit. One of the anomalies appears west of the crest. It is possible that an outcrop already exists. Adits are driven into deposits under contract by contract mining companies.

The buried treasure must be sorted.

That's another way of saying that the deposit may be poly-metallic and the valuable components need to be separated. Two options are apparent. Mill and concentrate on site or transport to another location for milling and concentration. the cost-benefit is calculated for both options.

The Fortymile mining district has thousands of placer deposits. The district has thousands of lode deposits. Each of these lode deposits represent an opportunity for miners to get busy. Over the course of time - looking forward, more areas will come under mineral closing orders, become wild and scenic areas or otherwise be removed from mineral entry.

- Geowizard
geowizardRe: Buried Treasure!
Light-weight exploration drills are available. In remote locations, it is sometimes necessary to lift drills by helicopter to the drill site.

http://www.mining.sandvik.com/

Sandvik Mining has portable exploration drills designed for remote areas.

Next, I will discuss the process of selecting the mining method.

Stay tuned... :smile:

- Geowizard
geowizardRe: Buried Treasure!

With reference to core drilling, 200 feet is shallow.

There is no shortage of options for drilling equipment. Here's another option:

http://www.ardco.net/products/geophysical/

The process of drilling should be done at leisure. In order to effectively drill a deposit, time should be taken to collect cores and properly document and box the cores into core boxes. I also collect the cuttings from the core drill for assay. If holes need surface casing to avoid collapse of the hole, then casing should be used. Drill holes provide a resource that can be used for future mining. If underground mining takes place, drill holes can be used as pilot holes for shaft sinking.

Stay tuned... :smile:

- Geowizard

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