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OCT-29-96 TUE 12 37 Ph <br />1 <br />SHEr'HEt~U i11LLEk FRh idU. 9r0 223 7111 <br />Port rate =cochcmistry. strllidt tailinst, Wane Amulet. Ouetxc ,~ <br />through Icach-)iquor rvdretrlation. and the cart of <br />wlM1de oxidation an be assumed to be tontrdkd <br />x+kly by tnrraport and rea~tivn mcclfanMns rt[hin <br />panida. For tar7in~ and trasro•roet pile undersu- <br />in; sutural oxidation, the rate tN stdM1de-mmml <br /> <br />oxidation mar also be controlled br tha wpply of <br />oxidant into the system. <br />A series of mathamaticat ntode4 that ia7Y(oe the <br />supply of oxygen is wntrolkd by both Q diRttaitre <br />throus}t the pore spa+.e o(the nihags asst! dilhnioo <br />FC. t, Bae[sc7ttaed-ekwroa a[icmtnph sha+irr~ a hrjr formtr pyrrhotite gain in +•hich anlr rcriduak <br />o(the sat(de rtmaia (pal alter np6cnxnt M iron auihn (sn. The irrejWar, rhiter pertphcral •einku <br />and rim ar< tnriched N Fe and p,ah+dy are Soethire. Adjnecnt mac~ethe gain (maa) a n:lati•ely <br />unakercd. Somple W A:09 tram the t+ottom of the axidCCd conc. scar the intermctfutc tone. <br />Fw. 5. BackaottettddtMron minoanph o! unaltered ehatcopyrita (ep) and an ctrenaireh eltercd gain <br />of pyrrleotite (po). Araas n( Nghtest gry to rhite. including the extrentcF. thin rim m0 the trx;alar <br />partida at the gaio mar;:tR. are corellite. Somt of tht co•tRin haf pencmred and partly replied <br />pyrrhotire aboa in paring planes. $amPte W A?~•G8. <br />P. 22 <br />