Sandstones carbonaceous matter

There are two possibilities here to explain this correlation. One is that isotopically heavy sulfide sulfur derived from seawater sulfate was fixed in shale because reducing agency of shale with carbonaceous matters is thought to be stronger than that of sandstone. The ore fluids extracted this sulfur. Gold of low NAg precipitated in shale like the Kuryu deposit under more reducing environment than in sandstone like the Saigane deposit. 

As regards the Chirmiri areas from where the two seams have been collected, Fermor (8) considered the most important exposure as that at the waterfall known as Karar Khoh in the Korea nala, where 36 feet of coal in seven beds occur in 48 feet of strata. The coal seams are underlain and over-lain by coarse to medium grained sandstones and black carbonaceous shales. Seam 2 is at the top of the section while Seam 4 is below. The two seams are separated by 40 feet. Seam 2 is 4 feet thick, while Seam 4 is actually 12 feet thick, but in the mines the mined portion is only 6 feet thick. Pillar columns were collected from these two seams for the present investigation they form the subject matter of this paper. 

The sedimentary cover reaches a thickness of some 2000 m in the centre of the basin and 125 m above the deposit. Uranium mineralization occurs mainly in the Stephanian, especially in carbonaceous siltites and argillaceous sandstone lenses with organic matter, at the contact between both layers. Mineralization occurs conformably or as scattered clusters, uranium being contained in pitchblende, coffinite, autunite, torbernite, heinrichite and uranophane. 

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