Australia's largest stock trading and investment forum Australia's #1 stock forum

it sounds like the king of metal detectors

First 3 Last

Share
Profile

Follow
zeedafrk

160 Posts.

22/05/20

18:07

Post #: 44784109
Share

Originally posted by Scipio_Africanus: ↑

MT and AMT are the same type of survey. The key thing is that they are using naturally circulating electro-magnetic fields in the earth's crust as the input or source field. Because these fields are very low frequency and long wavelength they can penetrate to great depths within the earth's crust. If there is a conductive (metallic) body in the area being surveyed then the source field will generate a secondary electromagnetic field within that conductive body. Very sensitive magnetometers are used on a survey grid to take the magnetic field measurements. The induced magnetic field can be differentiated from other magnetic fields by its vector direction as it is out of phase with the input field. The strength of this induced magnetic anomaly is directly proportional to the conductivity of the target body so results are usually reported in ohm-metres. MT surveys are used extensively in North and South America. They have not caught on so quickly in Australia due to cost and competition from other methods.

Expand

it sounds like the king of metal detectors
2 Upvote

Reply

Top Stories

WIN

'Incorrect datasets': Old irony sets WIN Metals up for golden opportunity at Emjay

AII

Inside the depths of Panasqueira: A legacy carved in rock

Listen: HotCopper Wire Podcast 017 – RBA holds the toppings

ASX Market Close: Tariff fatigue truly evident; RBA eftpos proposal sinks Tyro

Tuesday's HotCopper trends: Sayona intercepts, Bowen Coking crisis | July 15

First 3 Last

SPONSORED BY