IRONSANDS SURVEY
“Concentration At Surface’’
The ironsands of the South Taranaki Bight may be appreciably concentrated only near the surface, and there is danger in estimating the total amount by random sampling, D. I. Ross, of the physics department. Victoria University of Wellington, says in the “Journal of Geology and Geophysics.” All published investigations of the sands have been based on a relatively few samples taken from a considerable area, he says.
As the result of observations on the beaches between Wanganui and Pa tea with a permeability bridge, and in the laboratory with an artificial “beach” and “wind." Mr Ross concluded that there was bosh seasorting and wind-sorting of the titanomagnetite ironsands with respect to other sands, but that wind-sorting predominated. Wind-sorting in the laboratory model resulted in a region of surface concentration of titanomagnetite just in front of a “cliff” at the head of the beach.” A wind-funnelling effect would account for an observed high concentration of titanomagnetie in rivermouths.
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Bibliographic details
Press, Volume CII, Issue 30171, 1 July 1963, Page 7
Word Count
162IRONSANDS SURVEY Press, Volume CII, Issue 30171, 1 July 1963, Page 7
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