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Offline johnM8Topic starter
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« on: May 08, 2009, 06:21:39 am »
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Gday Fellow Prospectors,

Does anyone have any knowledge of the subject,ie,the study of plants to use as an indicator.We all know of quartz and ironstone(salt and pepper)does anybody know if trees and plants growing in mineralised areas act as an indicator

Cheers-John Detecting

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Offline Christian
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« Reply #1 on: May 08, 2009, 06:51:57 am »
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Hello John,

while I am unfortunately not knowledgeable on this at all, it sounds most interesting. I woild be happy to learn more about it, too!

Best wishes,

Christian

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Offline johnM8Topic starter
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« Reply #2 on: May 08, 2009, 06:28:03 pm »
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  [hello]Christian,
  The theory is some plants(trees, bushes or grasses) would grow better in the mineralised ground of goldfields.
 Idont know if this holds true in the USA but to some extent it does here in Aust.A lotr of the gfoldfields here in Victoria are in Iron bark(a native Aust. tree) forest .Chinese Broom Bush and Aust.Wild Cherry Tree are just 3of the plants linked to goldfields here in Victoria.Looking forward to what others think about these ideas.

  Cheers-John Detecting

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« Reply #3 on: May 12, 2009, 10:49:36 am »
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There are many a reference in old mining journals and books on prospecting from the turn of the centry, not 1900 to 2000 but 1800 to 1900, that talks about this type of search method. Most of the time if you get on the side of a hill and look into a field you will see greener than green in certain section. When you dig down it is usually oxidized mineralized soil. The opposite holds true if it is a sulfide layer, you will have large brown areas, or acide loving plants, in a field of green, nutral PH plants.

But just using the example of oxidized and/or sulfide has a lot to do with what is the base matrix of the soil. If you have any calcium carbonate, lime stone, of any quanity in the soil matrix this will throw off the PH of the soil and only none acid loving plants, or just nothing at all will grow. The examples go on and on but you can see my point.

-Tim-

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« Reply #4 on: May 12, 2009, 12:34:04 pm »
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hi from kev that is why you get shadows in the fields  Shocked Smiley Wink

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Offline johnM8Topic starter
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« Reply #5 on: May 12, 2009, 07:54:29 pm »
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  Gday Tim,Gday Kev,

  Thank you for the input,I really dont Know a great deal about this topic, but the more I can learn about it the better.
  The more you can recognise in the way of indicators,the better your chances.A lot of the aussie bush looks much the same,particularly in the outback,the eastern states are not so bad.

  Anymore thoughts from anyone would be most welcome and appreciated,thank you

  Cheers-John

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« Reply #6 on: May 13, 2009, 07:56:18 pm »
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I have the same issue that you have. I live in southern Nevada and do all my mining in the Southwest and northern Mexico. But the same principle can apply. When you locate a large, healthy grove of trees in your area it might be time to do a check on the plants for trace elements. Where I am I can usually find a really green Mesquite bush I will find one or two things. At times I will find really good humus and others I will see that the soil is heavy in minerals.

Using the NASA AMAS satellites you can retrieve really high-resolution SAR images. In these images you can use the color spectrum to help with the search of possible locations to look. I don?t know what is available in your neck of the woods but look at Microsoft Live Maps. They have really high res satellite images and I feel better quality than Google Earth. 

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http://es.ucsc.edu/~hyperwww/http://es.ucsc.edu/~hyperwww/
has some really good information on using remote sensing satellites to look for possible areas to dig. Also, I will be attaching a newsletter, Virginia Minerals, which talks about Botanical Prospecting and gives an idea on what to look for and the trace minerals found. This will be just as soon as I have the time to break the PDF into smaller segments so I can post it in this fourm.

Just remember, even though we are in the desert, it does not mean it is dead.


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« Reply #7 on: May 14, 2009, 02:18:47 am »
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  Gday nvprospector,

  Thank you for your time in answering my query.
  It is a really interesting facet of looking for gold,and one that most over here dont pay much attention to.
  Both kev and yourself have raised good points.I will certainly look at live maps and the other referred to site and thankyou
  for them.Look forward toVirginia Minerals sounds like its a good article.

  Thank You
  Cheers-John Detecting

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« Reply #8 on: May 18, 2009, 05:44:57 am »
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good look Smiley Wink kev by

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« Reply #9 on: May 18, 2009, 08:38:56 am »
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"For instance, a lesson in tracing the lode in a grass covered country was taught me many years ago by an old prospector who had struck good gold in the reef at a point some distance to the east of what had been considered the true course. I asked him why he had opened the ground in that particular place. Said he, "Some folks dont use their eyes. You stand here and look towards that claim on the rise where the reef was last struck. Now, dont you see there is almost a track betwixt here and there where the grass and herbage is more withered than on either side? Why? Well, because the hard quartz lode is close to the surface all the way, and there is no great depth of soil to hold the moisture and make the grass grow."


Chapter III

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