Figure 50a above. North America EagleEye enhanced gravity showing mines, rings and structural geology.
A detailed examination of North America is on my Webinar at, https://www.ausimm.com/videos/community-event/south-west-wageoscience-society—digital-tech-talk-new-discoveries-in-the-structural-geology-mineralization–exploration-targeting-of-north-america/
North America is (has been) arguably one of the largest producers of most of the world’s metals and fuels. We will have a look at a couple of the more interesting areas for exploration targeting. First an overview.
North America EagleEye gravity plan with mines.
Figure 50a above. North America EagleEye enhanced gravity showing mines, rings and structural geology.
This figure shows the cut-out area of North America from the Potato Earth gravity lower-left (the real shape of planet earth – 3D Animation HD https://vimeo.com/213210796). This figure shows no structural geology. We must focus it. When you enhance the potato earth gravity, rings and linear structures can be seen.
When it is structurally enhanced it shows three major ring structures all of which are known to be impact structures. C is the Cheasapeake ring impact structure, S is the Slate Island ring structure in Lake Superior and M is roughly where the Beaverhead impact structure is located. That these clear ring structures all relate to known impacts means these EagleEye ring structures are real.
The insert on the right-hand side shows the Lunar Mares which are roughly the same scale as the smaller rings on the North American continent. They correlate in number, density, and morphology (Grieve and Pilkington 1996, French 1998, French and Koeberl 2010).
Gravity data note. Most geoscientists do not use gravity often as it is generally believed that gravity can only be a very general guide unless you have detailed micro gravity. We have now seen that even Earth-Scale gravity, properly enhanced, can be a very powerful geological tool.
The diamond mines (white/blue circles) follow the NNW linear and occur where this linear intersects the NW and the SE of the large 3,000 km diameter ring M. As there is such a strong correlation between the rings, linears and mines we can use these as an exploration targeting tool.
The North American webinar (link at top) has a full report on all of the metals’ relationship to the structure but we will only look at a few areas here.