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Gold Prospecting Forums - General => General Gold Prospecting Forum => Topic started by: Xplore on July 22, 2019, 11:59:23 AM

Title: Vegetation patterns for ancient channels in aerial or satellite photos
Post by: Xplore on July 22, 2019, 11:59:23 AM
Anyone know what type of vegetation patters to look for in aerial or satellite photos when trying to find where ancient channels may be intersecting present rivers or creeks cross wise?

Would the vegetation be more dense or less dense? Why?

Are there any other patterns I should look for besides a difference in vegetation? For example, would the overburden look different?

Starting to comb through potential claim locations so I want to add the possibility of ancient channels to our hypotheses for each location.

Would appreciate any insights or specific examples of places where GPEX members could see examples of where ancient channels intersect (and ideally links to photos). 

Cheers,

Xplore

Title: Re: Vegetation pattens for ancient channels in aerial or satellite photos
Post by: suburbanator on July 31, 2019, 05:37:26 PM
Anyone know what type of vegetation patters to look for in aerial or satellite photos when trying to find where ancient channels may be intersecting present rivers or creeks cross wise?

Would the vegetation be more dense or less dense? Why?


Xplore

Have a look at the vegetation type you see up  where you were just working,   where the pipeline work was done etc.     That type of re-growth is typical also of old channels.   Photo attached is a great example.

So less dense,  different type of trees.....

Vertical light green path is an old rail line,  the horizontal is a steep but dry old river channel.   It only gets water at extreme run off,  and yet its a 20' deep canyon.

Not sure if that is is what your looking for.

Old Channel.png



Title: Re: Vegetation pattens for ancient channels in aerial or satellite photos
Post by: Brad F on July 31, 2019, 06:55:59 PM
Look for photos taken in the fall. For example, cottonwoods, poplar etc. , leaved trees give it away with their orange color. These trees love water. When you see a stand of them well above river level even 1000 ft. there's a reason that their still growing. Horsetail root is another indicator, you'd be surprised what I find in these areas. McBain saw it 1st hand on the Fraser when we were digging nowhere near the river, but rather up in the grass.
Title: Re: Vegetation pattens for ancient channels in aerial or satellite photos
Post by: Xplore on July 31, 2019, 06:59:59 PM
Thanks Chad and Brad, that's some great info!

-Xplore
Title: Re: Vegetation pattens for ancient channels in aerial or satellite photos
Post by: the gold guy on July 31, 2019, 07:19:45 PM
A lot of times you will find birch or poplar instead of evergreens were an old channel might be.
Title: Re: Vegetation pattens for ancient channels in aerial or satellite photos
Post by: mcbain on July 31, 2019, 08:56:57 PM
Was talking to a Gal from the caibou the other day.She told me they really concentrate on where the willows grow.Down here we have very little willow but cottonwood can be a good indicator.Luck,Mcbain.
Title: Re: Vegetation pattens for ancient channels in aerial or satellite photos
Post by: Brad F on August 01, 2019, 09:52:02 PM
Further more, I believe I said earlier in this post a 1000 feet up from a current flowing drainage I've seen a stand of deciduous trees mixed in with evergreens, I met up with CMMC one day a while ago and pointed out a stand way the hell up a mountain to him and his buddy, near mountain tops in  a particular drainage. What are cottonwoods doing way up there?  I laugh when my old neighbor who lived 3km away from me said "Ya know, if you did an assay on this horsetail root it would show traces of gold", he was right......
Title: Re: Vegetation pattens for ancient channels in aerial or satellite photos
Post by: mcbain on August 02, 2019, 08:38:18 PM
Good post Brad.Abit of trivia most tend to forget,Gold travels down to the creek/river bottom it does not come up to the creek bottom unless the creek is eroding away ancient deposits and even then it is not coming up.the creek is simply going deeper.Hope that makes some sense.Luck,Mcbain.
Title: Re: Vegetation pattens for ancient channels in aerial or satellite photos
Post by: JOE S (INDY) on September 30, 2019, 07:32:23 PM
Other than availability of water there is yet another factor - fresh soil.

Where the surface is disturbed - from a former streambed, road cut, mining operation, avalanche area or even a fire clearing, the bare soil will naturally replant itself with whatever seeds happen to fall on it.  Often that soil will replant with the lightest airborne seeds which include (in my area) willow and black balsam. 

Having reseeded the fresh soil the species of trees or vegetation will (or could be) very different than the usual mix of plant life.  Ground water and mineralization also have an effect but what grows in those formerly bare patches of soil may well not be 'the norm'.

One last factor to differing vegetation is an unusual winter with deep snow drifts, followed by cool summers.  Under the snow vegetation will die off and wherever there is bare ground ...........

Joe
Title: Re: Vegetation patterns for ancient channels in aerial or satellite photos
Post by: Shrewdly on October 05, 2019, 03:42:33 PM
You might find the following link helpful.

Shrewdly



https://www.for.gov.bc.ca/hfd/pubs/Docs/Mr/Scanned-Rn/Rn034-Rn066/Rn066A.pdf
Title: Re: Vegetation patterns for ancient channels in aerial or satellite photos
Post by: upnorth on October 06, 2019, 05:08:51 PM
Most ancient creeks may have been torn up by continental glaciers or even alpine glaciers.
Title: Re: Vegetation patterns for ancient channels in aerial or satellite photos
Post by: jurek on October 12, 2019, 01:28:56 AM
Hi
it depends !!! And this is a great topic !!! and very roomy !!!

Would the vegetation be more dense or less dense? Why?  General less dense !!! Flowers don't just need water !!!
On one of these channels I saw :  a herd of cows - and of course plants - generally these plants give depleted food to cows - so cows give  less milk and the meat tastes worse - farm crops - cultivation difficult conditions - This does not mean, however, that the flowers must be less green !!! - but sometimes they are - and no !!!
 Also depends on the deposit - climate - From the satellite you can - but not always - rely on plants -
but it's better to look at the terrain - and see plants !!! - You won't see it from the satellite - not everything -
1-2 percent !!! And not only the old channels you will see  -thanks to plants  !!!

Regards
Jurek
ps - my English is not perfect - sorry for that .




Title: Re: Vegetation patterns for ancient channels in aerial or satellite photos
Post by: johnedoe on October 12, 2019, 08:54:03 AM

Geochemical prospecting is an interesting subject. I know a guy that uses this method and is quite successful with it.
It does take some equipment and learning though.


This is from Action Mining Supply.

https://www.actionmining.com/wp-content/uploads/2019/06/June-2019.pdf

The info and supplies are on page 42 of their online catalog.

www.actionmining.com Prices good through June 2019 41
Geochemical Supplies
When looking for gold, don't took for gold,
look for geochemicals
Basic Theory
  The presence of geochemical haloes has been known and used for 59 years by many mining companies. All deposits of precious metals have associated geochemicals. Precious metals do not exist in deposits without geochemicals that are to some extent, water soluble. These geochemicals always wick their way out through solid rock and dirt over thousands of years. Such chemicals are detectable by our Geochemical Meter.
So when looking for gold, don't look for gold, look for geochemicals. The geochemicals spread out several hundred feet while the gold stays hidden. Most of the gold at the surface has already been located. Now the Geochemical Meter gives independent prospectors and miners higher technology for locating the 85% to 90% of gold that has not yet been found because it is beneath the ground surface.
In the past few years several of the larger mining companies have become discouraged with geochemical prospecting. They have made the mistake of looking for acid soluble geochemicals. Unfortunately, acid soluble geochemicals exist everywhere, and water soluble geochemicals exist only around mineralized veins and placers. Thus looking for acid soluble geochemicals can be very confusing and unproductive. When properly carried out, geochemical exploration is the best modern method available, regardless of price, when prospecting for precious metals.
What You Can Use It For
Preliminary Assays - If you want to know whether you should have a rock assayed or not, use this meter. A high reading should be assayed and a low reading indicates that it will be useless to assay the rock. The
instruction manual gives details.
Placer Prospecting and Evaluation - All placers have geochemical haloes. Does a placer exist in the area? The ground will read high in the placer area and will gradually taper off as you leave the placer. High readings in the dirt indicate a 98% chance of a placer if you use the meter correctly.
Prospecting for Hard Rock Gold Veins - All mineralized veins have geochemical haloes. These geochemicals wick their way to the surface over the hundreds of years. They even go through solid rock. You can use them to detect mineralized veins hundreds of feet deep in the earth.
Testing Rivers and Streams for Precious Metals - This is a fast, sure way of locating placer and hard rock deposits of precious metals. The Geochemical Meter can detect both more than a mile downstream from the deposit.
Locating Buried Treasure - All buried treasure eventually creates haloes of metals around it. This halo sometimes extends 100 feet and more depending upon time in the ground. This is true even if the treasure is inside of a cave in a wooden box. Proper use of the Geochemical Meter can be of invaluable use in locating such treasures. The Geochemical Meter does not replace metal detectors, rather use it in conjunction with metal detectors for serious treasure hunting.
Laboratory Testing - The Geochemical Meter will test dissolved geochemicals and metals in water. Many uses can be made of the meter. One suggestion would be to use the meter to tell when the metals have been leached out of an ore when doing cyanide or non-cyanide leaching.
Geochemical Meter
The Geochemical Meter weighs less than one pound. Its approximately 4" x 4.5" x 5" in size and can easily be carried into the field. Most tests should be conducted at home because of the increased accuracy of allowing each test to soak for approximately one hour. 10 or 20 or 100 tests can be set up to soak and then all completed with about I minute per test. Uses 2 standard 9 volt batteries. Several thousand tests can be accomplished on one set of batteries making tests cost less than 1 each. The actual meter readings are in micro mho's. The scales on the meter represent 0-1, 0-100, 0-1000 and 0- 10,000 micro mho's. In some cases a reading as low as 10 can indicate a mineralized vein is nearby. The instruction booklet gives complete details in translating the readings into probability of gold existing nearby and methods of locating same. Action Mining's Geochemical Meter makes geochemical prospecting both fast and accurate when done according to the 30 page instruction booklet which is included.
 Copyright 2019 Action Mining Services Inc All Rights Reserved 503 826-9330
www.actionmining.com
Prices good through June 2019
42
  How To Use The Meter:
Pulverize your rock to 80 mesh (about the size of table salt) or screen any placer dirt to 50 mesh. Measure out 10 grams. Mix with 40 grams of distilled water and pour into the Geochemical Meter. Push the button on the meter and read the needle. Immediately wash out the meter. Testing streams and rivers is easier. Just pour the water in and push the button. NOTE: To use the Geochemical Meter properly one must first determine the background readings for the area in question. This is accomplished in a very short time through use of the Geochemical Meter.

Geochemical meter only
Geochemical Meter Instruction Booklet
Carrying Case - Made of hard plastic outer shell with foam rubber inside to hold meter.
Cat # GEOCHEMCS Price $ 65.00
Range Extender - Increases the range by a factor of ten (X10) on all of the above ranges, i.e., the 10,000 range is extended to 100,000. Cat # GEOCHEMRANG Price $ 27.00
BUNDLED PACKAGE - Meter, carrying case, range extender, and booklet Cat#GEOCHEMPK Price $520.00
Geo Meter - Actually a 5 in 1 meter! Reads temperature, pH, PPMs, conductivity, and salini- ty. Range , 0-2000 PPM (this is for geochemicals), 32.0-149.0F, 0.00-14 pH. Resolution 0.1 PPM, 0.1F, 0.01 pH. By Extech Cat#GEOMETER $215.00
Geo Calibrator Solution - recommended for use with the small GeoMeter or the full size Geochemical Meter referred to above. Cat # GEOCALIB Price $ 29.95
The Story of Geochemical Prospecting
by R. T. Axworthy, 4th edition revised & updated by Action Mining in 1992 - an in-depth coverage of geochemical prospecting including the University of Alaska's method using Dithizone. You learn how to take samples and do tests. There are also 3 chapters on tips for prospectors. "Must" reading for anyone getting into geochemical studies. Cat #BOOK-GEO Price S 32.33
Shown - Instruction Booklet, Geochemical Prospecting Manual, GeoMeter (at left), Geochemical Meter in Carrying Case with Range Extender
 Cat #GEOCHEM
Price $ 440.00 Cat # GEOCHEM3
Price $ 12.00
           Copyright 2019 Action Mining Services Inc All Rights Reserved 503 826-9330
Title: Re: Vegetation patterns for ancient channels in aerial or satellite photos
Post by: jurek on October 12, 2019, 12:20:46 PM
Hi
So tell me one qestion !!!
gold prospectors  have created several sciences
including botany - and it's easy - very easy - plants say it all .
regards
jurek
Title: Re: Vegetation patterns for ancient channels in aerial or satellite photos
Post by: jurek on October 13, 2019, 01:03:45 AM
Hi all !!!
answering the question- where can you see it
three hundred years after Albert the Great / creators of botany / a guy
the Pope's confessor had contact with the works of Albert the Great
and lectured at the same University - on his mining field !!!
From the 16th century !!!
I have studied his  mining field carefully and I am surprised by the knowledge of miners from 500 years ago !!

Regard
Jurek
Title: Re: Vegetation patterns for ancient channels in aerial or satellite photos
Post by: jurek on October 13, 2019, 01:19:32 AM
Hi
At the first in the world Mining  University - in Banska Stiavnica - botany was taught !!!
Best regard
Jurek