Paydirt.co.nz

New Zealand Gold Prospecting & Metal Detecting Forums Archive

 

The forum has moved to community.paydirt.co.nz, see you there!

This forum is now an archive to preserve the knowledge and finds posted here.

Low pressure zones
overdog  
Posted : Tuesday, 10 December 2013 6:20:01 PM(UTC)
overdog

Rank: Gold Ingot

Medals: Donation: Made a donation helping cover the running costs of the site - thank you :)

Groups: Registered
Joined: 2/03/2010(UTC)
Posts: 418
Man
Location: nelson

Thanks: 69 times
Was thanked: 82 time(s) in 68 post(s)
Technical question-a side creek joins a major river.Both are gold bearing.In flood where are the low pressure zones where the gold carried by both waterways drops out?Upstream of the side creek?Downstream?

Its making my head hurt trying to work this out-any hydrologists out there?
Back to top
kiwijw  
Posted : Tuesday, 10 December 2013 10:12:05 PM(UTC)
kiwijw

Rank: Gold Ingot

Groups: Registered
Joined: 28/03/2010(UTC)
Posts: 1,152

Thanks: 92 times
Was thanked: 658 time(s) in 324 post(s)
Right where the two currents meet.

JW :)
Back to top
overdog  
Posted : Wednesday, 11 December 2013 12:17:53 PM(UTC)
overdog

Rank: Gold Ingot

Medals: Donation: Made a donation helping cover the running costs of the site - thank you :)

Groups: Registered
Joined: 2/03/2010(UTC)
Posts: 418
Man
Location: nelson

Thanks: 69 times
Was thanked: 82 time(s) in 68 post(s)
Thanks for that John... so in theory there should be a gold line extending out into the main flow starting from the upstream side of the small creek?
Back to top
Golddigger7  
Posted : Wednesday, 11 December 2013 2:50:36 PM(UTC)
Golddigger7

Rank: Gold Ingot

Medals: Donation: Made a donation helping cover the running costs of the site - thank you :)

Groups: Registered
Joined: 6/09/2012(UTC)
Posts: 252
Man
Egypt

Thanks: 1 times
Was thanked: 46 time(s) in 35 post(s)
Eddies are low pressure zones, usually a large eddie at the down stream junction of both streams, and also have eddies behind any protrusion into the current. hope this helps.
Back to top
Golddigger7  
Posted : Thursday, 12 December 2013 2:57:23 PM(UTC)
Golddigger7

Rank: Gold Ingot

Medals: Donation: Made a donation helping cover the running costs of the site - thank you :)

Groups: Registered
Joined: 6/09/2012(UTC)
Posts: 252
Man
Egypt

Thanks: 1 times
Was thanked: 46 time(s) in 35 post(s)
oh and Prospector Jess on youtube has some videos out that would be helpful for you as well?
Back to top
kiwijw  
Posted : Thursday, 12 December 2013 3:54:54 PM(UTC)
kiwijw

Rank: Gold Ingot

Groups: Registered
Joined: 28/03/2010(UTC)
Posts: 1,152

Thanks: 92 times
Was thanked: 658 time(s) in 324 post(s)
When a side creek enters another river, I dont think it matters if only one is gold bearing or both, when the two currents bump in to each other is causes a major disturbance in the flow at that point & causes a drop out zone in the disturbed area of flow where the heavies drop out. A very good example of this was the junction of the Moonlight & Moke & the Moonlight & the Shotover. The junction of the Moonlight & the Shotover was known as the jewellery box for that very reason & was very very rich in gold. L & M Mining pulled out a massive amount of gold from there.

JW :)
Back to top
overdog  
Posted : Thursday, 12 December 2013 5:14:40 PM(UTC)
overdog

Rank: Gold Ingot

Medals: Donation: Made a donation helping cover the running costs of the site - thank you :)

Groups: Registered
Joined: 2/03/2010(UTC)
Posts: 418
Man
Location: nelson

Thanks: 69 times
Was thanked: 82 time(s) in 68 post(s)
Thanks Golddigger-usually pretty good with finding where gold drops out-bends and bars and what have you but just cant visualise 2 streams...
Best bet would be to go look when the rivers are up I suppose but that would be a real mission without a helicopter!
Back to top